Starting out – Page 4 – Hoopoe

The NHBS Guide to UK Chat and Flycatcher Identification

Chats and flycatchers are birds in the Old World flycatcher family, the Muscicapidae. They are small passerine birds and are mainly insectivores. Chats (subfamily Saxicolinae) were originally included in the thrush family, Turdidae, but were reclassified after genetic analysis. Several chats and flycatchers have a number of subspecies, although the classification of these species is often contested.

This family contains many well-known species, such as the nightingale and the robin, which have important cultural connections and have inspired many songs, fairy tales, artworks and poetry. The nightingale’s song has been an important symbol for many poets and writers, often depicted as a mournful lament. The robin has featured prominently in British folklore for centuries, with a strong association with Christmas beginning in the mid-19th century. In both the 1960s and 2015, the robin was voted as the unofficial national bird of the UK.

Many of the birds on this list are striking examples of our wildlife but some now face a serious threat of extinction in the UK. Several have been listed on the birds of conservation concern 4 (BoCC4) red list, such as the pied flycatcher and whinchat, due to their severe population declines. These declines have been attributed to several different threats, including agricultural intensification, climate change and nest failures caused by mowing.

Nightingale (Luscinia megarhynchos)

Distribution: Summer migrant, visiting between April to July/August, Found mainly in the south east, east of England, south west and areas of the east and west Midlands.
BoCC4 status: Red
What to look for: The nightingale is a brown species, with a paler throat and underside and a reddish tail. They have pale, pinkish legs and a small beak that is yellow and grey.
Did you know? There are three accepted subspecies, the western nightingale (L. m. megarhynchos), which visits the UK, and the caucasian (L. m. africana) and eastern nightingale (L. m. golzii).

Black redstart (Phoenicurus ochruros)

Distribution: Rare. During the summer, they’re found mainly in Greater London, Birmingham and the Black Country, with scattered pairs in Liverpool, Manchester and along the south coast between Suffolk and Dorset. During the autumn and winter months, they can be found along the south coast and areas of Wales and Scotland.
Birds of Conservation Concern 4 (BoCC4) status: Red
What to look for: This species is a similar size to the robin. Males are grey-black with a red tail, dark brown wings and a dark black face. Its underside is lighter and it has paler fringes on its secondary feathers, forming a whitish panel. Females are browner and lighter, with the same red tail. They have darker wingtips and a black beak.
Did you know? There are several subspecies of the black redstart, with different authorities accepting between five to seven subspecies, generally separated into three major groups according to DNA sequencing, biogeography and morphology. The subspecies that visits the UK is P. o. Gibraltariensis, one of the two European subspecies.

(Common) Redstart (Phoenicurus phoenicurus)

Distribution: A summer migrant, found in the north and west of the UK, with the greatest concentrations in Wales.
BoCC4 status: Amber
What to look for: The redstart has a distinctive bright orange-red tail. Males are black and grey with a red underside and black legs. Their face is black and their crown is grey, with a white patch across the forehead. Females are duller, with a greyish-brown colouration but still have red tail feathers.
Did you know? There are two subspecies accepted for this species. The one that migrates to the UK is P. p. Phoenicurus, the other subspecies, P. p. samamisicus, is found in the Crimean Peninsula, Turkey, the Middle East and parts of Central Asia.

Stonechat (Saxicola rubicola)

Distribution: Present across much of Scotland and Wales, parts of Northern Ireland and parts of England, particularly the south coast and the east of England.
BoCC4 status: Green
What to look for: During the summer, males have a black head with white patches on either side of their throat, a rust-red breast, streaked dark brown wings and a pale underside. During the winter, they are brown with a rust-brown breast. Females resemble the male winter form, although they are a lighter brown with a whitish throat.
Did you know? There are two currently recognised subspecies, S. r. hibernans (present in the UK) and S. r. rubicola. S. r hibernans is the darker subspecies, with less white than S. r. rubicola.

(Northern) Wheatear (Oenanthe oenanthe)

Distribution: Much of Scotland, Wales, Ireland and northern England, as well as parts of the coasts of south east and south west England.
BoCC4 status: Green
What to look for: The males have a blue-grey upperside, black wings and a white underside, with an orange breast and throat. They have a black mask, edged above and below with white. Females are brown, with dark wingtips and an orange breast and throat, with no black mask. Both have a white rump and tail, with a black T-shape on their white tail. Immature and non-breeding birds lack the contrasting black wings and are buff coloured.
Did you know? There are four accepted subspecies, two of which have been recorded in the UK, O. o. oenanthe and O. o. leucorhoa.

Whinchat (Saxicola rubetra)

Distribution: Summer migrants to Scotland, Wales and the north and north east of England. They can be found in other areas during their migration, such as parts of the south west and Ireland.
BoCC4 status: Red
What to look for: This species has a pale eyestripe, dark cheek and crown, and a pale chin. The males have a streaky brown upperside, with a buff-orange breast and throat during the breeding season, but females are paler. Male whinchats have a dark tail with a white underside, while females have a paler tail with a white underside.

Bluethroat (Luscinia svecica)

Distribution: This is a rare species and can be seen on passage between May to June and August to October, usually along the east coast of the UK.
BoCC4 status: Not assessed
What to look for: Two subspecies visit the UK, the red-spotted bluethroat (L. s. svecica) and the rarer white-spotted bluethroat (L. s. cyanecula). Both species have grey upperparts and white underparts, with a chestnut-coloured patch under their tail. The males have a bright blue patch on their throats, which is where the two subspecies differ. The white-spotted bluethroat has a patch of white on its throat within the blue patch, whereas the red-spotted bluethroat has a chestnut coloured patch. Under this patch on both subspecies is a half-moon of black and another of chestnut feathers. The beak is black, with yellow colouration on the inside and a yellow gape flange, the area where the upper and lower mandibles of the beak join together at the base.

(White-spotted) Gertjan van Noord via Flickr

Pied Flycatcher (Ficedula hypoleuca)

Distribution: A summer migrant present in Wales, the north west of England, and parts of the south west and Scotland.
BoCC4 status: Red
What to look for: Male pied flycatchers have a mostly black upperside and white underside, with a white patch on the folded wing. Females and non-breeding males are browner, with a brownish chest and a less bold white wing patch. They have a black beak, and breeding males have a small white patch above it.
Did you know? There are four recognised subspecies, F. h. hypoleuca is the subspecies that visits the UK but there is some suggestion that F. h. tomensis (formally F. h. sibirica) has also been recorded in Britain.

Spotted Flycatcher (Muscicapa striata)

Distribution: Widespread across the UK between April to August/September.
BoCC4 status: Red
What to look for: The spotted flycatcher is a streaked grey-ish brown species, with a pale underside and a streaked breast and crown. They have a dark beak and legs and are a similar size to a house sparrow (Passer domesticus).
Did you know? There are five recognised subspecies of spotted flycatcher. The subspecies that migrates to the UK is M. s. Striata.

Robin (Erithacus rubecula)

Distribution: Widespread across the UK.
BoCC4 status: Green
What to look for: This well-known bird has brown upperparts, a brown crown and a red face and breast. It has a pale underside and a grey stripe from its eye to its side, between its brown and red plumage.
Did you know? There are multiple subspecies of the robin, although the exact number is contested. E. r. melophilus is endemic to the UK and there is some suggestion that E. r. rubecula, the western European subspecies, has also been recorded here.

The NHBS Guide to UK Deer Identification

Deer are among the UK’s most elegant and familiar mammals and sightings of them in their natural habitat are always special moments, however these encounters can often be fleeting, and our views obscured.

This ID guide covers all of the native and non-native deer species that are found in the UK, and describes the key features to look out for to aid in their identification.

Deer are hoofed ruminants that comprise the family Cervidae. They are naturally found across Europe, Asia and the Americas and can be divided into two subfamilies, differentiated mostly by their bone structures. Most familiar in the UK are the Cervinae or old world deer subfamily, which includes the red, sika, fallow, Chinese water and Reeves’ muntjac. The Capreolinae (new world) sub family includes the roe deer as well as elk, reindeer and all the species found across the Americas.

Of the six species found in the UK, only the red and roe deer are truly native, although fallow deer were thought to have been first introduced to Britain in the 11th Century from the Mediterranean region, so are long established. Three other species, the sika deer, Chinese water deer and Reeves’ muntjac are all more recently naturalised within the UK.

Identification of deer can be straightforward in some situations, but some species are similar and, when not seen well, identification can be a challenge. Two of the best features to focus on for identification are the rump and the antlers, if they are visible. Except for reindeer (caribou), in which both sexes grow antlers, and the Chinese water deer and musk deer, which lack any antlers, all male (stags) deer usually grow antlers, which they use in battles to access females (hinds) during the rut. Antlers are unique to deer and a great tool to look at to identify different species. However, they are shed every year after the rut, so although a striking feature, the rump pattern of deer is perhaps the most reliable feature to use for identification.

Red Deer (Cervus elaphus)

Distribution: Widespread in Scotland and abundant in the Highlands and Islands. Elsewhere populations occur in Cumbria, Lancashire, the Peak District and Pennines, Exmoor and the Quantock Hills, the New Forest, and East Anglia. There are also small populations in Wales and Ireland.

Head and body length: 1.6–2.6 metres for a male and 1.7–2.1 metres for females

Height at shoulder: 1.14–1.22 metres.

What to look for: Both our largest species of deer and land mammal, the magnificent stags can weigh in at around 200kg making them an impressive and noticeably large species. Look for their reddish-brown coat that lacks any spots or delineation of colour. Only their rumps and tails feature a paler buff cream colour. Another characteristic of red deer are their elongated faces and large ears.

Their favoured habitat is woodland, although in Scotland they have adapted to live year-round in more open treeless landscapes. Grasses make up the bulk of their diet throughout the year, but they will also browse on a wide range of shrubs, young trees and bark, brambles, bracken and heathers. Sika deer are the most similar looking and the two species have hybridised in several regions. Sika have white spots in summer and darker brown coats in winter with shorter faces. Hybrid red and sika deer tend to resemble smaller darker red deer than they do sika.

Antlers: The antlers of mature stags are wide and branching with usually 8 sets of points per antler that curve upwards and sometimes in on themselves. Younger males have short unbranched, straighter pointed antlers.

Rump: A soft creamy colour with a very short russet-brown tail.

Sika Deer (Cervus nippon)

Distribution: Sika deer are native to Japan, Korea, Taiwan and far eastern Asia, but escaped into Britain from collections in 1860. Since their initial introduction in 1860, they have naturalised and spread to many regions. Population strongholds include Dorset and the New Forest, Lancashire and Cumbria Northern England, the Scottish borders and the Highlands.

Due to their genetic similarities to red deer, sika deer are thought to have hybridised with the native red deer in several regions, particularly in the Scottish Highlands. Sika prefer to keep to woodland cover more than red deer which have adapted to feeding in more open habitats.

Head and body length: 1.2–1.9 metres for a male and 1.1–1.6 metres for female.

Height at shoulder: 1.07–1.22 metres.

What to look for: Sika are very similar in appearance to red deer and the two species do interbreed in many regions. They are noticeably smaller than red deer and in summer they have white spots on their coats, but thick and often dark (sometimes almost black) coats in winter.

Their diet and feeding habits are very similar to red deer, with grasses and heather making up the bulk of their diet, but they will also browse on both deciduous and coniferous trees, gorse, holly bark and acorns. They are however generally less social than red deer and outside of the breeding season, both males and females can be solitary with females forming only small herds with young.

Antlers: Similar to those of red deer, but thinner, lighter coloured and less complex with usually only 4 points per antler.

Rump: A conspicuous white rump patch with a dark edge and a short white tail with a single thin dark dorsal stripe along its length.

Roe deer (Capreolus capreolus)

Distribution: A woodland specialist that’s rarely found far from some woodland cover, although they are increasingly using hedgerows and scrub as cover within more agricultural and urban landscapes. They are widely distributed throughout the UK but absent from Ireland, with the greatest population densities found in Scotland.

Head and body length: 0.95–1.25 metres

Height at shoulder: 0.6–0.75 metres

What to look for: A medium sized lightweight deer with a long neck and uniform brown coat. Other features that distinguish them from the larger deer include shorter muzzles and a clean white rump patch. In summer their coats turn a rich reddish brown and appear sleeker, while in winter, the coat turns a thicker and dark more peanut brown.

They are mostly solitary but sometimes form small family groups with young, particularly during the winter. They browse a wide variety of trees, shrubs and herbs including bramble, heather, and rosebay willowherb but during the autumn will also feed on the ground on fruits, acorns and occasionally fungi.

Antlers: Short and mostly vertical, they are rarely much taller than the head, with only 2 or three points per antler. With a close view, the antlers can often appear particularly velvety or crusty at the base, depending on the season and growth stage.

Rump: The patch varies between the sexes, but both have a clean white patch and no visible tail. Males have a kidney shaped white patch, whereas females have more of a round shape.

Chinese water deer (Hydropotes inermis)

Chinese water deer by Nick Goodrum via Flickr

Distribution: The Chinese water deer is a native of eastern China and Korea but has formed a naturalised population in England after escaping from Woburn Park in Bedfordshire towards the end of the 19th Century. They’re found throughout most of East Anglia and a more scattered population in the southeast-England where there is suitable habitat. The strongholds include the Norfolk broads and Cambridgeshire fens. The population trend is increasing, with over 1500 individuals and their distribution is also expanding. Interestingly, it is thought that due to population decline in their native range, the British population may now represent a significant part of their world population, despite not being a native species.

Head and body length: 1 metre

Height at shoulder: 0.7–0.95 metres.

What to look for: A small and uniformly light brown (sometimes greyish) coloured deer with large, rounded ears and a distinctive black nose. They are strongly associated with freshwater marshland habitats where they feed on coarse grasses, reeds, herbs and aquatic vegetation. Chinese water deer are solitary and secretive, preferring to keep close to cover and use both woodland close to wetlands and reedbeds. They will occasionally forage in farmland but prefer to keep close to cover.

Males have impressive and prominent downward pointing tusks instead of canine teeth that can be seen with a close-up view. These tusks are used during the rut, mostly for display purposes between rival males and to impress females. They are quite a distinctive looking deer with a more unusual almost bear-like face, although their secretive nature means that obtaining good views can be difficult.

Antlers: This species lacks any antlers.

Rump: Their rear and short tail is the same pale brown colour as the rest of their coat.

Reeves’ muntjac (Muntiacus reevesi)

Reeves’ muntjac by Peter Trimming via Flickr

Distribution: The Reeves’ muntjac is also native to China and again its UK population derives from escaped individuals from Woburn Park in Bedfordshire from 1901. They are now abundant and found throughout southern, eastern and central England spreading rapidly into southwest-England, Wales and southern Scotland. Since 2000, a population has become established in Ireland and Northern Ireland.

Head and body length: 0.9–1 metres

Height at shoulder: 0.45–0.52 metres

What to look for: A very small, robust and stocky deer that often appears to have a hunched-over appearance due to its short neck, arched back and tendency to walk with its head facing down to the ground. The coat varies from a deep russet brown in summer to a greyer and paler brown in the winter. The face is short and squat with a characteristic set of black stripes creating a V shape on the top of the head. Male muntjac also have slightly protruding tusks but they are much shorter than those of Chinese water deer and rarely visible without a close view.

Muntjac favour dense undergrowth within both deciduous and coniferous woodland but will also thrive within urban environments with suitable cover. They browse woodland leaves and flowers during the spring and summer including some scarce woodland ground flora species. During the autumn and winter their diet switches to nuts, fungi and grasses.

Antlers: A single very short point that curves back.

Rump: The rear patch and tail are the same reddish-brown colour as the back. The tail is short but when alarmed it will often raise the tail revealing the white underside.

Fallow Deer (Dama dama)

Fallow deer by Heather Smithers via Flickr

Female fallow deer by Steve Slater via Flickr

Distribution: Introduced to Britain for hunting in the 11th Century and to Ireland in the 13th Century from the Eastern Mediterranean, the species is now found throughout England, with more scattered populations in Wales and Scotland.

Head and body length: 1.45–1.55 metres for a male and 1.30–1.45 metres for a female.

Height at shoulder: 0.7–0.95 metres

What to look for: Fallow deer are quite variable in their appearance due to their wide range of pelage (hair). Typically, most individuals have some conspicuous white spots on pale brown, fawn or gingery coats in the summer and then dark brown coats with only faint or no spots in the winter. There is a great range of variation within this species though with some individuals and populations remaining very dark or very pale throughout the year, some of which can be melanistic. Fallow are medium sized deer that are very social, often forming large herds that remain together throughout the year. Due to their numbers, they also leave conspicuous signs of their presence such as runs and tracks in frequented areas.

Their preferred habitat is open deciduous woodland but will also use farmland and woodland edge habits if there is cover close by. Fallow deer are grazers with grass forming most of their diet, although they will also eat nuts and browse on heather, holly and some deciduous trees to a lesser extent.

Antlers: Very large, broad and palmate shaped with numerous spikes.

Rump: A clean white rump with a dark outside edge. The tail is long and appears mostly black because of a long black stripe that runs down the course of its length, but the underside is clean white.

The NHBS Guide to UK Rabbit and Hare Identification

Rabbits and hares are species in the family Leporidae, which contains over 60 species. They are mammals within the order Lagomorpha, together with the pikas. They are small to moderate-sized species, characterised by long hind legs, long ears and rapid movements. They are almost exclusively herbivorous, feeding mainly on grasses and herbs, although they do also eat leaves, fruits and seeds. Leporids are coprophagous, meaning they pass food through their digestive system twice. To do this, they first expel the food as soft green faeces, termed cecotropes, which they then reingest, eventually expelling it again as dark faecal pellets. This increases their ability to break down and digest plant material, extracting further nutrients.

They inhabit a wide range of habitats, from mountains and wetlands to forests and grasslands. Leporids play an essential role in many of these ecosystems, as seed dispersers, ecosystem engineers (a species that significantly modifies their environment) and as a primary prey item for a number of predator species, such as foxes, wildcats and some mustelids, including stoats and weasels. Their young are particularly vulnerable to these predators, as well as badgers, domestic cats and several birds of prey. Because of this vulnerability, many leporids have large litters, often nesting in burrows underground to protect their young from predation.

One threat to populations, particularly in European rabbits, is myxomatosis, a disease caused by the poxvirus Myxoma virus. Its two natural hosts, the tapeti and brush rabbits of South, Central and North America, experience only mild disease. However, myxomatosis is a severe and usually fatal disease in European rabbits. When the disease originally spread to the UK in the early 1950s, the mortality rate was 99%. In the 1970s this declined to between 47 and 69% but populations were severely affected. The disease, which causes localised swelling, skin lesions, blindness and respiratory distress, has also been deliberately introduced into the wild on multiple occasions. Used to try to eradicate or control rabbit pest populations, myxomatosis was intentionally introduced in Australia, New Zealand, South America and parts of Europe, including Britain.

Other threats to leporid populations include rabbit haemorrhagic disease (RHDV1 and RHDV2), hunting, habitat loss and agricultural intensification. Rabbit populations declined by 64% in the UK between 1996 and 2018 and numbers of brown, mountain and Irish hares are also thought to have declined in some areas. As ecosystem engineers, the loss or reduction of these species can have major consequences, particularly for rabbit-dependent habitats. In their absence, the consequent changes in vegetation structure due to a lack of grazing can have further impacts on other wildlife, such as invertebrates.

Rabbit (Oryctolagus cuniculus)

Distribution: Widespread across the UK, although they are absent from Rum, Isles of Scilly and some smaller islands.
What to look for: Rabbits are the smallest leporids in the UK, with the characteristic long ears and long hind legs. They have a sandy, grey-brown colouration and a white tail. They have dark, amber coloured eyes. Other than their size, the most noticeable difference between rabbits and other leporids in the UK is the lack of a black tip on the ears.
Did you know? The rabbit, also known as a coney, is not native to the UK. The exact date of their introduction is one of ongoing research. It was previously thought that rabbits were first introduced by the Normans in the 11th or 12th century as both a food and fur resource. But the recent re-examination and radiocarbon dating of a bone found at a Roman palace show that at least one rabbit was present much earlier, in the first century AD. Researchers have stated that there is no evidence of many rabbits in the area and another analysis suggests the rabbit was kept in confinement, therefore it has been suggested that it was most likely kept as an exotic pet.

Brown hare (Lepus eueopaeus)

Distribution: Widespread across the UK, although they are less common and more restricted in Northern Ireland and absent from parts of north-west Scotland.
What to look for: This species is larger than the rabbit, with long, black-tipped ears and very long hind legs. Their colouration is redder than the rabbit and the mountain hare, and they have a black-topped tail that is white underneath. The brown hare has amber eyes and their fur can appear grizzled.
Did you know? This species is also non-native and were introduced in the Iron Age. Radiocarbon dating of bones found in Hampshire and Hertfordshire, along with historical accounts, suggest that brown hare were not eaten until hundreds of years later during the Roman period, and were instead associated with deities.

Mountain hare (Lepus timidus)

Distribution: Mainly in the highlands of Scotland, although they are also found in other areas of Scotland, on some Scottish islands and in the Peak District.
What to look for: This species has a grey-brown coat during the summer and a white coat in the winter, although the tips of their ears remain black in both forms and their tail remains white. They have brown eyes and long ears, although these are shorter than the brown hare’s.

Irish hare (Lepus timidus hibernicus)

Distribution: Widespread across Ireland
What to look for: They are very visually similar to the mountain hare, except they do not develop a white coat during winter months and are noticeably smaller. During the summer, their coat is reddish-brown which dulls to grey-brown in winter, although their tail remains pure white.
Did you know? The Irish hare is a subspecies of the mountain hare and is the only lagomorph species native to Ireland. Fossil carbon dating suggests that these hares have been present in Ireland for at least 30,000 years.

Jimmy Edmonds via Flickr (Image cropped)

Domestic rabbit (feral) (Oryctolagus cuniculus domesticus)

Distribution: Unknown
What to look for: Domestic rabbits can have a huge variety of appearances, with at least 305 breeds of domestic rabbits around the world, although different numbers are accepted by different organisations. They can vary in size, colouration, body shape, coat type and ear length.
Did you know? Many pet rabbits are abandoned each year, particularly in the period after Easter.

The Naturalist’s Microscope Guide Part 1: Stereo Microscopes

When thinking of the varied toolkit of the enterprising naturalist, a microscope is perhaps not the first thing that springs to mind. Nevertheless, for many entomologists, botanists and comparative zoologists, the ever-reliable 10× hand lens eventually proves insufficient. Indeed, many species of insect, lichen and fungi (among many others) are difficult to identify past genus or even subfamily without the use of more powerful optics. Animal scat, small mammal dentition and hair fibres can be likewise difficult to evaluate without suitable magnification. But researching the best optical equipment for your purpose can be a disheartening task, especially for naturalists who are likely to come across a wide range of resources for the engineer and medical professional, but sparse pickings tailored to their own specific needs.

For most naturalists, the 3D image and relatively low magnification of the stereo microscope (also called the low-powered dissection microscope) fits the bill nicely. However, with several big-name brands, a wide range of price points and numerous specifications available for uses across a plethora of fields, it’s useful to be armed with some background knowledge when choosing your own microscope.

Stereo Microscopes

Stereo microscopes are made up of several parts: most include a base with or without illumination, a pillar with an adjustable bracket for the head and a head comprising of two eyepieces and one or two objective lenses, depending on whether the microscope uses the Greenough or Common Mains Objective design (discussed below). Some also include a third eyepiece or ‘photo tube’.

Specifics regarding the different parts of the microscope will be discussed later, but for now, it is important to understand how magnification is calculated. The optics of a stereo microscope consist of two eyepiece lenses and one or two objective lenses with which they are paired. Each provides its own zoom – typically 10× for a standard eyepiece and 2× or 4× for the objective (although many objectives provide a range of magnifications between 2× and 4×, see below). The overall magnification is calculated by multiplying the objective and eyepiece lenses together, for example a system with 10× eyepieces and a 2× objective will provide a zoom of 20×. Some objectives have a dynamic zoom lens, as we’ll discuss later.

Optical Systems: Greenough vs Common Mains Objective

Stereo microscopes are grouped by the optical system that they use – Greenough or Common Mains Objective (CMO). Both systems have distinct advantages and disadvantages, so knowing the difference is vital.

A staple since its original conception in the 1890s, the Greenough Optical System works by angling two objective lenses towards each other to create a 3D image. The objectives have wide apertures for good light-gathering potential, providing a crisp, clear image. It is also cheap to produce, meaning that most entry- to mid-level stereo microscopes utilise this design. However, as the lenses are slightly tilted, the focus is not constant across the image – the outer left and right portions of the view are always slightly over-focused while the centre is clear. This is known as the ‘keystone effect’, and while it is often unconsciously corrected for by the human eye, it does cause the viewer to experience eye fatigue more rapidly than the alternative.

Introduced in the middle of the 20th century, the Common Mains Objective (CMO) system uses one objective lens that is shared by both eye pieces, allowing for exceptional light-gathering potential, and eliminating the keystone effect. However, the single objective leads to a problem known as ‘perspective distortion’, in which the centre of the image appears to be elevated like a fish-eye lens. Models that correct this can cost thousands of pounds, so for many naturalists, a high-end Greenough system is likely to be a better investment than a low-end CMO microscope.

Magnification

Once you’ve decided which system you would like to go for, consider the magnification. Most microscopes under £1,000 fall into the 20-40/45× range. Occasionally 60× models are offered in this bracket, but it’s definitely worth testing these before purchase as the extra range can come at the cost of features such as lens quality. Remember too that as zoom increases, the aperture of the lens decreases, making the image worse. For most insects above 2mm, a 20×-40× microscope should do the job. Groups that rely on minuscule features or genitalia dissections may require higher magnifications, but this often requires a better-quality microscope that uses high-quality parts to maintain a clear, bright image.

The cheapest stereo microscopes use a ‘fixed’ zoom system, with a single pair of objective lenses that provide one magnification, normally 20×. The objective (and sometimes the eyepieces) can be removed and replaced manually with a higher magnification alternative.

Models above the £150 mark generally use a rotating ‘turret’ system shared with compound microscopes. Two pairs of objective lenses are included and can be rotated into place, generally 2× and 4× allowing for 20× and 40× magnification. For the serious amateur naturalist looking to invest in a ‘workhorse’ style system, this is often the design to choose, and many professional entomologists and botanists spend years learning with such an optic.

Finally, stereo microscopes above around £300 generally use a dynamic zoom system. This allows the magnification to be altered across a range (normally 20-40×). The default 10× eyepiece can be swapped for a greater magnification if desired. Many also include a ‘click stop’ system for easy reading of the magnification without having to look up. The flexibility of these microscopes makes them the most popular choice among many naturalists.

The Head: Binocular vs Trinocular

This is simple but important to consider. While the binocular head is generally considered to be the default for stereo microscopes, the trinocular variant is extremely popular among researchers and anyone who seeks to document their microscopy: the addition of the third eyepiece (phototube) allows for a camera to be attached and images or video to be captured while the user is viewing the image. Many microscope cameras are designed to be used specifically with a phototube and will not function when used with a binocular head. Some, like the Moticam X3, can be used with either.

The Stand: Base, Stage Plate and Illumination

When choosing an illumination system, it is important to consider what you’ll be using your microscope for. You’ll often see plain (no illumination), halogen, or LED bases offered, with the plain option being the cheapest and LED the most expensive. Most illuminated bases offer both transmitted and reflected illumination, referring to the way in which light reaches the eye. The reflected system utilizes a light that shines straight down on the subject, reflecting the light off of the subject and into the user’s eye. This is the most commonly used design among naturalists, as the examination of opaque objects such as insects, plant material and mammal hairs requires the user to observe the sample’s upper surface.

Transmitted illumination utilizes a bulb beneath the sample, projecting light directly to the user’s eye, similar to a compound microscope. This is used in the examination of translucent samples such as aquatic invertebrates and some macroalgae.

This is also where stage plates come in. Sitting below the subject as the ‘background’ of the image, most microscopes come with opaque black and white options for use with the reflected illumination setting and a frosted glass option that light will shine through for use with transmitted illumination.

Don’t immediately discount a plain base. Many naturalists prefer not to use built-in illumination that sits directly above the subject, as specimens that require the examination of fine details on the sample’s surface, such as many beetle species, can be difficult to ID under such a light. The best solution is to purchase a dedicated microscope illumination unit, a handy tool that usually includes two swan neck LEDs that can illuminate the subject from whichever angle is most auspicious. These aren’t cheap, but the cost of one is often covered by the money saved in purchasing a base without a built-in light.

Finally, consider the difference between halogen and LED illumination. For many purposes, such as the examination of bones, animal hair or water samples, this is irrelevant and largely comes down to a matter of taste. However, some materials are prone to desiccation under the heat of a halogen lamp. Therefore, particularly for entomological work and work involving live samples, LED illumination is often preferred.

More Information

The array of options that go alongside buying your first microscope can be daunting, but with a little consideration, you should be well set to explore the wonderful world of the tiny. Keep in mind your budget, and the microscope’s intended function, and you won’t go wrong. The information in this blog should be a strong starting point, but if you should want any more advice, feel free to get in touch with our friendly team of Wildlife Equipment Specialists via customer.services@nhbs.com or phone on 01803 865913. Our full range of stereo microscopes can be found here.

The NHBS Guide to UK Mustelid Identification

Mustelids are species in the family Mustelidae of the order Carnivora. They are medium to small mammals comprising around 56-60 species worldwide, eight of which are found in the UK, including feral ferrets. While the conservation status of most is considered Least Concern in Great Britain, several of these species are considered Critically Endangered or Near-Threatened in individual UK countries. This is mainly due to historical and current persecution and habitat loss. Pollution, however, has also impacted mustelid species, such as the otter, which was particularly affected by pesticides, such as organochlorines. Thankfully, many of the most harmful pesticides have been banned in most European countries since 1979, allowing populations to begin to recover. Other conservation efforts, such as legislative protection, habitat restoration and relocations, are also helping to restore mustelid populations.

Mustelids, other than badgers, are characterised by their long, thin body shape, which allows them to enter burrows and tunnels used by their prey. These mainly include rabbits and small mammals, but also some birds, bird eggs, invertebrates and fish. Several species resemble one another, particularly the stoat and the weasel, but several key identification features can help you to correctly identify the species. Colouration, body size and distribution within the UK can be helpful, as well as other features such as tail size, shape and colour, snout shape and even their running gait. Binoculars or a scope can help you to identify these features from a distance.

Polecat (Mustela putorius)

Distribution: Found throughout Wales, parts of Scotland and central and southern England.
Body length: 32–45cm
Tail length: 12–19cm
What to look for: This species has dark brown guard hairs, the top or outer layer of the coat, and buff-coloured underfur, giving them a two-tone appearance. They have a dark face with a white stripe across it, similar to a ferret. They can produce hybrid offspring with ferrets that can be difficult to identify, but the hybrids usually have a lighter appearance and more white on their faces.

Pine Marten (Martes martes)

Distribution: Mainly found in Scotland and Ireland, although fragmented populations are found in northern England and North Wales.
Body length: 46–54cm
Tail length: 18–27cm
What to look for: The pine marten has a chestnut-brown colouration with a pale yellow patch on its chin and throat that resembles a bib and a long, bushy tail. The ‘bib’ is uniquely shaped on each pine marten, meaning individuals can be identified by the pattern.

Stoat (Mustela erminea)

Distribution: Widespread throughout the UK, although absent on the Isles of Scilly, most of the Channel Islands and some Scottish islands.
Body length: 17–32.5cm
Tail length: 6.5–12cm
What to look for: This species is orangy-brown with a cream-coloured underside and throat. They have a very similar appearance to the weasel but there are some key differences: the stoat is larger, with a longer, black-tipped tail and a distinctive bounding gait compared to the run of the weasel.

Weasel (Mustela nivalis)

Distribution: Widespread in England, Wales and Scotland but is absent from Ireland and most islands.
Body length: 11.4–26cm
Tail length: 1.2–8.7cm
What to look for: The weasel is the smallest species of Carnivora in the UK, with a russet-brown coat that can appear more orange in certain lights, and a cream underside and throat. Their tails have no black tip and are much shorter compared to the stoat’s tail, and they run with a straight back, rather than the arched, bounding gait of the stoat.

American Mink (Neovison vision)

Distribution: Widespread across the UK, thought to be absent from the far north of Scotland and some Scottish Islands.
Body length: 31–45cm
Tail length: 13–23cm
What to look for: The mink has dark brown fur with a white chin and throat and a narrow snout. They can resemble otters but they can be distinguished by their smaller size and face, as well as their darker fur.
Did you know? The American mink is an invasive species, introduced into the wild in the 1950s and 1960s as a result of fur farm escapees and deliberate releases. Accurate population estimates are difficult but many areas are attempting to control numbers as American mink are a serious threat to the endangered water vole (Arvicola amphibius).

American Mink by Kary Nieuwenhuis via Flickr

Eurasian Otter (Lutra lutra)

Distribution: Rare but widespread throughout the country, although absent from areas in central and southern England, the Isles of Scilly, the Isle of Man and the Channel Islands.
Body length: 60–80cm
Tail length: 32–56cm
What to look for: This species has brown fur with a grey tint, a paler chest and throat and a broad snout, which can be used to distinguish it from the mink.
Did you know? In the UK, otter populations were in severe decline in the second half of the 20th century, due to hunting, pollution from pesticides and habitat loss. Conservation efforts have allowed populations to start to recover, with otters returning to every county in England.

European Badger (Meles meles)

Distribution: Widespread throughout England, Wales, Scotland and Northern Ireland. Absent from far north Scotland, Scottish Islands, the Isles of Scilly, the Isle of Man and the Channel Islands.
Body length: 75–100cm
Tail length: 15cm
What to look for: This is a distinctive species, with a grey back, black underside and paws, a fluffy, short tail and an unmistakable black-and-white striped face.

European Badger by caroline legg via Flickr

(Feral) Ferret (Mustela furo)

Distribution: Feral populations throughout Britain, but thought to survive best on offshore islands, such as Shetland, Mull, Harris, Islay, Rathlin Island and North and South Uist. There is also a population in North Monaghan.
Length: 48–56cm (including tail)
What to look for: This species has multiple colour variations, including white, brown, black or mixed fur. Their nose is usually pink, although they can have darker blotches, and they have a thin white band across the face with darker eyes, giving it a bandit-like appearance. They can be hard to distinguish from the polecat, from which it is descended. Where there is an established population of both species, hybridisation can occur. Patches of white on the fur, particularly the paws, can indicate either a ferret or a hybrid.

The NHBS Guide to UK Puffball Identification

Puffballs are a type of fungi in the division Basidiomycota. They are so named due to the dust-like spores that are emitted as clouds when the fruitbody bursts. They are characterised by their lack of an open cap with visible spore-bearing gills. The spores are, instead, produced internally within the gasterothecium, a spheroidal fruitbody. Stalked puffballs have, as the name suggests, a stalk to support this structure, which is tough, woody and made of infertile material, whereas true puffballs have no visible stalk. Some species, such as ones attached to the substrate by mycelial cords, may become unattached and roll with the wind.

Puffballs are saprotrophic, meaning they feed on non-living organic matter, known as detritus. They break down detritus into utilisable nutrients and minerals, which maintains soil health and aids plant growth. Puffball species can be identified by the shape and size of the fruitbody, any surface features and the presence and shape of a stem. Species can also be determined by the examination of spores using a microscope. When cut in half, young puffballs whose spores have not begun to develop will be pure white all the way through. Older species turn yellow or brown on the inside. This can help distinguish them from earthball species, which has a dark interior (or gleba), or other mushroom species, which have visible gills.

Most puffballs are not poisonous but can resemble young poisonous mushrooms such as the death cap. True puffballs are edible when immature but any spore can cause digestive upset if consumed and caution should always be taken as some fungi are highly poisonous. This blog is not meant to be used as a guide for foraging. This blog covers the key identification features, distribution, season and habitat preference of some of the puffball species known in the UK.

Common Puffball (Lycoperdon perlatum)

Distribution: Common and widespread in Britain and Ireland
Habitat preference: Deciduous and coniferous woodlands, grasslands and along roadsides.
Season: July to November
What to look for: This species usually has a pear-shaped fruitbody that is 3–6cm tall. Its surface is covered in pearl-like attachments, called pyramidal warts, that are different sizes. These warts begin as a cream colour before turning ochre and falling off to leave an olive-brown surface marked with scars. Older specimens will have a dark area at the apex, where the pore hole develops. The common puffball has a visible stem that resembles an often distorted inverted cone. The spore mass is olive-brown and turns dark brown when fully mature.

Giant Puffball (Calvatia gigantea)

Distribution: Widespread and fairly common
Habitat preference: Roadside verges, field edges, nettle and other rank vegetation, woodland edges and occasionally found in open woodland or woodland clearings
Season: July to November
What to look for: This species can achieve a massive size, typically 10–80cm across. They are initially white, with a lumpy and leathery appearance, connected to the substrate by a root-like mycelial cord. While the interior of the immature puffball is white, mature specimens have a greenish-brown gleba.
Did you know? This species is known to form fairy rings. The mycelium hyphae spreads horizontally in a radial pattern. The hyphae can then sprout fruitbodies on the surface, forming a circular pattern thought in folklore to be the dwelling places of fairies and other magical beings.

Peter O’Connor aka anemoneprojectors via Flickr

Pestle Puffball (Lycoperdon excipuliforme)

Distribution: Widespread and fairly common
Habitat preference: Woodland and short grassland
Season: August to November
What to look for: The pestle puffball is initially white but turns ochre as it ages, and grows to between 10–20cm tall. The globe-shaped head grows between 4–10cm wide. The stem-like section, called a stipe, is often wrinkled in appearance and usually around half the diameter of the head. It is covered in pointed warts that fall off, leaving a smooth surface.
Did you know? After the head has ruptured and released the spores, the stipe will grow and remain intact throughout winter.

Dusky Puffball (Lycoperdon nigrescens)

Distribution: Widespread, fairly common
Habitat preference: Variety of habitats, such as woodland, moorland and sand dunes
Season: June to September
What to look for: The dusky puffball is usually between 2-3.5cm tall and 2-4cm across. It is pear-shaped, with a surface that begins pale brown before turning darker. It is covered in dark-brown spines that fall off as the puffball matures. This species has a visible, short stem with shorter spines. The spore mass inside is initially white and firm, before turning yellowish-brown and then dark brown and powdery.

Mosaic Puffball (Lycoperdon utriforme)

Distribution: Widespread but uncommon
Habitat preference: Sandy open pastures or heaths
Season: July to November
What to look for: The common name for this species is derived from the pattern across the head of the fruiting body, which develops as the specimen matures and the outer wall breaks into patches. It is subspherical to pear-shaped, between 6–15cm across and up to 15cm tall. The fruitbody turns grey-brown with age and the scales begin to fall away before the fruitbody eventually ruptures.
Did you know? The base of this species can also persist for several months after the fruitbody has burst. It resembles a blunt-ended inverted cone.
Other synonyms: Calvatia caelata, Calvatia utriformis, Handkea utriformis, Lycoperdon bovista, Lycoperdon caelatum, Lycoperdon sinclairii, Lycoperdon utriforme

Brown Puffball (Bovista nigrescens)

Distribution: Widely distributed, more frequent in southern counties
Habitat preference: Grassland and pastures, but can also be found in fields, lawns or roadside verges
Season: Late summer to autumn
What to look for: The fruitbody is between 3–6cm across, with a slight point at the bottom. This species lacks a stem and is attached to the substrate by a mycelial cord. The outer wall is initially white but flakes off as the fruitbody matures to expose the dark purple-brown inner wall.

Saxifraga/Peter Meininger via freenatureimages.eu

Stump Puffball (Lycoperdon pyriforme)

Distribution: Widespread and fairly frequent
Habitat preference: Grows mainly on decaying trees and logs
Season: July to early December
What to look for: This species is typically 1.5–4cm across and around 3–4cm tall. It has a pestle- to pear-shaped fruitbody that is initially covered in short pyramidal warts. The originally white surface browns with age, developing a dark area at the apex where the pore will occur. The stump puffball is attached to the substrate by several mycelial filaments. The stem remains white as the head matures.

The NHBS Guide to UK Goose Identification

Geese are birds in the family Anatidae, comprising mainly of the genera Anser and Branta. They are a common sight in our estuaries and other wetlands, particularly during autumn and winter. Many species are migratory visitors to the UK, arriving in autumn and leaving again in spring to places such as Greenland and Iceland. There are some resident goose species, however, which are present all year round, such as greylag and Canada geese.

They feed mainly on seeds, grass, other water plants and some small invertebrates. They are primarily grazers and can search for food both on land and underwater. In UK species, males and females rarely differ in colour, though males are usually larger in size. Geese are monogamous and often pair for life, but several studies have noted evidence of extra-pair copulation (mating outside of this pair bond). One study, for example, found evidence of extra-pair copulation in 14% of 42 Canada goose clutches.

Identifying geese can be based on colouration, distribution, calls, time of year and size. Very little equipment is needed for birdwatching, but we recommend a pair of binoculars or a scope, along with a guide to other waterfowl you may see.

Greylag Goose (Anser anser)

Distribution: Resident population is widespread throughout the UK, although less common in Wales and southwest England. Scottish and southwest England populations are boosted by winter migrant numbers.
Birds of Conservation Concern 4 (BoCC4) Status: Amber
Wingspan: 147–180cm
What to look for: The greylag goose has a grey body and a brown back. It has a brown and grey striped neck, an orange to pink bill and pink legs. They have a paler tail and pale secondary feathers that stand out in flight.

Canada Goose (Branta canadensis)

Distribution: Resident population, widespread, although less common in Scotland and Ireland.
BoCC4 Status: Not Assessed
Wingspan: 150–180cm
What to look for: The Canada goose has a black head, neck and bill, with a white patch on its throat. They have a white underside and a brown back, with black tail feathers and black legs.
Did you know? Canada geese are not native to the UK and were introduced from North America in the 17th century.

Egyptian Goose (Alopochen aegyptiaca)

Distribution: Resident population in East Anglia and southern coastal areas, with winter migrants in southeast England. The largest population is along the Norfolk coast.
BoCC4 Status: Not Assessed
Wingspan: 110–130cm
What to look for: This is a distinctive species, with a pale, dappled grey underside and darker grey to reddish-brown back and wings. They have a reddish-brown and white head with dark patches around their orange-yellow eyes. Their tail and primary feathers are black, and their secondary feathers are green. They have pink legs and feet, and a pale pink bill with a black tip and black basal knob, a prominent bump at the base of the bill.
Did you know? The Egyptian goose was first introduced to the UK as an ornamental bird that then escaped and now successfully breeds in the wild.

Barnacle Goose (Branta leucopsis)

Distribution: Throughout coastal areas in the UK during winter, with a resident breeding population in southern England.
BoCC4 Status: Amber
Wingspan: 132–145cm
What to look for: This species has a black head, neck and breast, with a white face and a black patch running from its eye to its black bill. It has a white underside, black and grey barred back, a black tail and black legs.

White-fronted Goose (Anser albifrons)

Distribution: Winter migrants are found in coastal areas throughout the UK, particularly near estuaries.
BoCC4 Status: Red
Wingspan: 130–165cm
What to look for: There are two subspecies of white-fronted goose in the UK, the Greenland white-fronted goose (A. a. flavirostris) and the European white-fronted goose (A. a. albifrons). The white-fronted goose is greyish-brown with a large white patch around the bill and orange legs. They have black bars on the front of their underside, white feathers under the tail and have a white line between their wings and body. The two subspecies differ in a number of ways but most notably the Greenland white-fronted goose has an orange-yellow bill and a darker, ‘oily’ appearance, whereas the European white-fronted goose has a pink bill and a lighter plumage.

European white-fronted goose by Ian Watson-Loyd

Brent Goose (Branta bernicla)

Distribution: Found around estuaries and saltmarshes throughout most of the UK coastal areas in winter.
BoCC4 Status: Amber
Wingspan: 110–120cm
What to look for: This is a darker species, with a black head, neck and primary feathers. Their body is grey-black in colour, with either a dark or pale underside and a white tail. They have a white patch on their neck, a black bill and black legs.

Bean Goose (Anser fabilis)

Distribution: Two subspecies in the UK, taiga bean goose (A. f. fabilis) (Falkirk, Scotland and Norfolk, England) and tundra bean goose (A. f. rossicus) (erratic appearances in winter but most common in eastern and south-eastern England).
BoCC4 Status: Amber
Wingspan: Taiga: 147–175cm, Tundra: 118–140cm
What to look for: The taiga bean goose is darker and browner than other grey geese, with a darker head and neck and orange legs. It has an orange patch on its bill. The tundra bean goose has a similar appearance but is smaller, with a slightly darker plumage and a stockier body. It has the same orange patch on its bill but it is smaller, covering less than half of the bill.

Pink-footed Goose (Anser brachyrhynchus)

Distribution: Winter migrants are most common in coastal areas near large estuaries and central England.
BoCC4 Status: Amber
Wingspan: 135–160cm
What to look for: A medium-sized goose, this species is grey with a darker back and head, pink legs and feet, and a pink and black bill. It has white feathers under its tail and a striped pattern on its neck.

Snow Goose (Anser caerulescens)

Distribution: Migrant species are more likely to be spotted in Scotland and Ireland. There is also a feral breeding population in Scotland.
BoCC4 Status: Not Assessed
Wingspan: 132–165cm
What to look for: This species has two colour forms, an all-white body with black wing feathers (pictured) and a white-headed form with a blue-grey body and wings. In both forms, it has an orangy-pink bill and pink legs.

U. S. Fish & Wildlife Service Southwest Region via Flickr

The NHBS Guide to UK Duck Identification

Ducks are waterfowl from the family Anatidae, which also contains geese and swans. They are mostly aquatic birds and there are several resident, breeding and migrant species in the UK. Ducks are split into multiple families, or ‘tribes’, such as dabbling ducks (Anatini), diving ducks (Aythyini) and sea ducks (Mergini). All ducks are generally elongated and broad, with long necks. They have bills and strong, well-developed legs for swimming. The males often have more elaborate plumage than the females, and often similar-looking females of different species can be confused.

Ducks eat a wide variety of food, including vegetation, fish, invertebrates and small amphibians. They have multiple predators including foxes and birds of prey, such as hawks or owls. Ducklings are particularly vulnerable and can also be taken by herons, pike, rats, mink and weasels.

Winter is a great time to birdwatch for ducks in the UK: some species occur in much higher numbers compared to the summer months, and 3 of the 22 species that occur in the UK can only be seen in the winter. The best places to see ducks are lakes, marshlands, estuaries, coastal bays and other wetland areas.

The best equipment for birdwatching is a pair of binoculars or a scope, a notebook and pen to record your sightings, and a guide for more information on other species of duck.

Shelduck (Tadorna tadorna)

Distribution: Present in almost all coastal areas in the UK year-round, as well as some inland waters such as reservoirs.
Size: Length (L): 55–65cm, wingspan (WS): 100–120 cm
Birds of Conservation Concern 4 (BoCC4) Status: Amber
What to look for: Shelducks are a large, boldly-patterned and colourful duck with a white body, dark-green head and red bill, a chestnut band around their chest and pink legs. They can be spotted along estuaries and on the coast.

Eider (Somateria mollissima)

Distribution: During the breeding season, they’re most common northwards from the Northumberland coast and off the west coast of Scotland. During the winter, their range expands to include areas along the east and south coasts, parts of the southwest coast and some areas of the Welsh coast.
Size: L: 60–70cm, WS: 95–105 cm
BoCC4 Status: Amber
What to look for: Eiders are large and impressive sea ducks (rarely seen away from the coast) with distinctive wedge-shaped heads. The males are boldly marked in black and white with subtle green and yellow markings on their head and neck. The females are a dark mottled brown colour all over, providing camouflage during nesting.

Goldeneye (Bucephala clangula)

Distribution: Mainly restricted to the highlands of Scotland during the summer, their winter range includes most coastal areas, lakes, large rivers and other inland water bodies. They are particularly best looked for in north and west Britain.
Size: L: 40–48cm, WS: 77–83cm
BoCC4 Status: Amber
What to look for: Goldeneyes are diving ducks, found mostly in larger lakes and reservoirs. The males are black and white, with a large, dome-shaped head that has a green sheen to it. As its name suggests, it has a distinctive, bright yellow-gold eye, as well as a white spot between its eye and bill. The female is grey with a brown head.

Mallard (Anas platyrhynchos)

Distribution: Widespread
Size: L: 55–62cm, WS: 81–98cm
BoCC4 Status: Amber
What to look for: A common species, the male has a bright green, shiny head, yellow bill, and a brown chest. They have a paler underside and maroon and pale wings with a bright blue patch outlined in white and black, called a speculum. The female is a mottled brown, with a brown and yellow bill.

Mandarin Duck (Aix galericulata)

Distribution: An introduced species, the main population is in the south, central and eastern areas of England, but there are small numbers in northern England, Wales and Scotland.
Size: L: 45cm, WS: 65–75cm
BoCC4 Status: Not Assessed
What to look for: The mandarin is an unmistakable bird. The males have a very elaborate plumage of orange, green, blue, white, and brown, with a bright pinkish-red bill. They have plumes on their cheeks, sail-like feathers on their backs and longer feathers down the back of their head. The female is grey and brown, with a white eye stripe and green feathers at the ends of their wings.

Pochard (Aythya ferina)

Distribution: During the summer, pochards are most likely found along the east coast of England but in the winter they can be seen along almost all of the UK coastline, as well as on large lakes and estuaries inland.
Size: L: 44–48cm, WS: 77cm
BoCC4 Status: Red
What to look for: The male pochard has a grey body, black chest and tail, and a reddish-brown head. They have a bright red eye and a black and grey bill. The female is a darker brown, with dark eyes. They also have a black and grey bill, but with less grey than the males. This species was once common but populations are rapidly declining.

Female pochard by Koshy Koshy via Flickr

Tufted Duck (Aythya fuligula)

Distribution: Widespread across England, parts of Scotland and Northern Ireland. Less common in Wales and south-west England but they can be seen here as their range expands during the winter.
Size: L: 41–45cm, WS: 70cm
BoCC4 Status: Green
What to look for: The male tufted duck is black with white flanks, and a long ‘tuft’ at the black of their head. They have bright yellow eyes and a grey bill with a black spot at the end. The female has brown feathers and no white flanks. The females’ tufts are shorter or sometimes not present.

Male tufted duck by ianpreston via Flickr

Female tufted duck by Noel Reynolds via Flickr

Gadwall (Anas strepera)

Distribution: Mainly found in the Midlands, south-east of England, parts of Scotland’s east coast, eastern Northern Ireland and along the south and north coasts of Wales. Their range expands during winter to include Cornwall and North Devon, parts of Scotland’s west coast and larger areas of Northern Ireland.
Size: L: 48–54cm, WS: 78–90cm
BoCC4 Status: Amber
What to look for: Male gadwalls are grey-brown in colour, with black and white tail feathers. They have a paler head with a black bill and black eyes. Females are mottled brown, with a black bill edged with orange. They have a white and black speculum that also contains reddish-brown on the males.

Shoveler (Spatula clypeata)

Distribution: Widespread in England and along the Welsh coast during winter but more restricted to east and north-east England and the Midlands during summer, with some populations in parts of Scotland, Northern Ireland and the south coast of England.
Size: L: 47–53cm, WS: 77cm
BoCC4 Status: Amber
What to look for: The shoveler has a large, broad shovel-like bill. The male has a dark green head, white chest, reddish-orange flanks, and a black and green back and tail. The males also have yellow eyes and a black bill. The female is a mottled brown, with a yellow-orange bill.

Pintail (Anas acuta)

Distribution: Restricted to scattered areas of Scotland and the east of England in summer in only small numbers. Their significant winter population has an expanded range that includes much of the English coastline and parts of Wales, Northern Ireland and Scotland.
Size: L: 55–65cm, WS: 80–95cm
BoCC4 Status: Amber
What to look for: This is an uncommon species in the UK, but it is easily distinguishable by its long tail feathers. The male has a dark chestnut head, a white chest with black feathers on the back of its neck, and a grey body. They have black feathers along their back and a black tail, dark eyes, and a grey and black bill. The female has shorter tail feathers, a mottled brown colouration and a grey bill.

Northwest Power and Conservation Council via Flickr

Useful Resources

RSPB ID Spotlight: Ducks, Geese and Swans Unbound | June 2022

This guide is a reliable fold-out chart with illustrations of 30 of the UK’s most familiar wildfowl by renowned artist Stephen Message. Species are grouped by family to assist with identification and artworks are shown side-by-side for quick comparison. The reverse of the chart details the habitats, behaviour, life cycles and diets of the group, as well as the conservation issues they are facing and how the RSPB is working to support them.

Guide to Ducks, Geese and Swans Unbound | January 2019

This fold-out chart from the Field Studies Council (FSC) shows 32 species of ducks, geese and swans you are likely to see in Great Britain and Ireland. Not included are domestic ducks and geese descended from respectively the mallard (1 species) and the greylag (30 species).

RSPB Spotlight: Ducks and Geese Paperback | May 2020

This detailed ‘biography’ of ducks and geese in the UK covers 30 species in total. It includes chapters on their evolution, anatomy, courtship displays and breeding behaviour. The author reveals their migrations and examines their social interactions with their own and other species, including humans, and discusses their presence in historical folklore and literature.

The NHBS Guide to UK Owl Identification

There are six owl species in the UK, although only four are native (barn, tawny, long-eared and short-eared owl). We also get occasional visitors, such as the snowy owl (Nyctea scandiaca).

Owls are mainly nocturnal and feed on predominantly small mammals such as the field vole (Microtus agrestis), but also some small birds, invertebrates, amphibians and fish. All these species are listed as ‘least concern’ by the IUCN red list but face serious threats in the UK, such as habitat loss, declining prey populations and a decrease in nesting sites, as well as direct deaths such as from car collisions or poisoning. Owls can be used as an indicator species for the health of the food chain: their decline may indicate that other wildlife that also depend on the same habitats are also under threat.

Identification of owl species usually relies on colouration and eye colour, as well as their call. This is particularly important as owls are often active at night and therefore are hard to identify by sight.

There are several types of equipment that can be useful when searching for owls, such as binoculars, night vision monoculars, a headlamp or flashlight and a guide to owl pellet identification. If you wish to encourage owls onto your land, there are a variety of nest boxes available, depending on the species you wish to attract.

Little Owl (Athene noctua)

Distribution: Widespread throughout England and parts of Wales. Rare in southern Scotland
What to look for: The little owl is a small species, with brown and white feathers in a dappled appearance. It has a short tail and bright yellow eyes. Usually out at night, it is most likely to be seen perched on structures such as trees, telegraph poles and fences.
Did you know? The little owl is non-native in the UK and was introduced in the late 1800s. It is not thought to cause any detrimental impacts on any other species.

Barn Owl (Tyto alba alba)

Distribution: Widespread across England and Wales, with decreasing density towards north Scotland and scattered distribution in Ireland
What to look for: An iconic species, the barn owl is instantly recognisable. Its silver and golden-brown back and pure white underside and face are distinctive, along with its heart-shaped face and black eyes. Its face shape plays an important function for hunting, as it directs high-frequency sound to their ear openings, such as those produced by mice and voles. This helps the barn owl to perform precision hunting in tall vegetation. Another subspecies, Tyto alba guttata, which has a darker coloured underside, also occurs in the UK.
Did you know? Owing to their large wing size compared to their body mass, and the structure of their feathers, barn owls fly almost completely silently.

Barn Owl by Portable Portraits via Flickr

Tawny Owl (Strix aluco)

Distribution: Widely distributed in England, Wales, and parts of Scotland, but not in Northern Ireland
What to look for: The tawny owl has mottled brown feathers with flecks of white and more reddish-brown. Its colouration can vary from brown to grey. This species has a paler underside and a round head, with large black eyes and a dark ring pattern around its face.

Long-Eared Owl (Asio otus)

Distribution: Widespread across the UK, although fewer individuals in Wales and south west England.
What to look for: This mottled brown species has bright orange-red eyes and long tufts that resemble ears, hence the common name. The long-eared owl is a shy, nocturnal species that can be found in communal roosts in densely covered woodland and forests. The population is boosted in winter due to numbers of migrating individuals from other parts of Europe.

Short-Eared Owl (Asio flammeus)

Distribution: Migratory species, found across Scotland and northern England in summer before moving further south during winter.
What to look for: Often confused with the long-eared owl, this species is slightly slimmer, with a paler colour and yellow eyes rather than the long-eared owl’s orange. It has brown feathers on its back and a pale belly, with darker feathers framing its eyes. They also rarely display their ‘ear’ tufts.

Short-eared Owl by Oregon Department of Fish & Wildlife via Flickr

Eurasian Eagle-Owl (Bubo bubo)

Distribution: Very rare, scattered around the north of the UK, including Lancashire, Greater Manchester, Galloway, and Inverness-shire.
What to look for: The Eurasian eagle-owl has tufts similar to the long-eared owl. It is a large bird, weighing up to 4.6kg compared to the barn owl at 500g. This species is mottled, but there is a high variation in plumage colouration for this species, from browny-black to a pale grey. There is often a dark band running from the eye to the ends of the ‘ear’ tufts. It may have pale sections around the eyes and beak, with a darker, splotched forehead.
Did you know? There is serious debate surrounding this owl species and its place in the UK countryside. While there is fossil evidence that suggests this species inhabited the UK before becoming extinct, many don’t believe it is a native species. Therefore, the conservation of this species and the safety of the individuals present in the UK is under threat.

Eurasian Eagle-owl by Jenny Laird via Flickr

The NHBS Guide to UK Bird Nest Identification

The main breeding season for birds in the UK is between March and August every year. This article looks at some of the various bird nests built by UK species.

What are they made of?

Not all birds build nests, but those that do use a huge variety of materials, depending on the nesting time, the species and surrounding habitat. They can contain tightly woven twigs, grass or woody stems. Other species use premade nooks and crevices in trees, natural structures or buildings. Nests can be lined with softer or warmer materials such as animal fur, moss, mud or feathers. These materials are usually held together by spider webs, twine-like vegetation or even horsehair.

Nest varieties

Nests can be a variety of sizes, depending on the size of the bird, the need to remain hidden and the structural limitations. For example, the largest recorded bird’s nest is a bald eagle (Haliaeetus leucocephalus) nest at 2.9m wide and 6m deep. It was recorded in 1963 in Florida, USA. In Scotland, a golden eagle (Aquila chrysaetos) nest was recorded in 1954 at an impressive 4.57m deep. The smallest recorded birds nests are made by hummingbird species, around 2cm wide and 2-3cm tall.

How are they built?

The nests can be built by either the male or female, or they can work together. They can take from a few days to a few weeks to build, depending on the size and complexity. Some bird species build a new nest every breeding season but others, such as the goshawk (Accipiter gentilis) will use the same nest for many years.

Identification

Often enough, if you observe a nest from a distance, you’ll be able to identify the species when the adult birds return. But there are other ways to identify the owners of a nest. Nest size, shape, material and placement can all be useful ways to identify them, as well as egg size, number, colour and pattern. Some nests and eggs are so similar, however, they can be very difficult to identify in the field. Nests and eggs are protected by law through the Wildlife & Countryside Act 1981; it is an offence to take, damage or destroy any wild nest. Disturbance can lead to young being abandoned and injury to nesting birds – please observe nests from a safe distance.

Location and timing can also be important, as not all bird species nest at the same time and some only nest in certain ranges within the UK. Many species can also be quite specific about the habitat they nest in.

Nests are usually categorised by type and those in the UK can include:

Scrapes

These are nests of the simplest construction, usually a shallow depression in the sediment or vegetation. They can sometimes be lined with vegetation, stones, feathers or shell fragments, often to help camouflage the eggs. This is a common nest type of many wader species, as well as pheasants, quails and bustards.

Ringed Plover (Charadrius hiaticula)

The ringed plover breeds on open ground, such as beaches and gravel flats. They lay their eggs directly on the ground in an open area with little or no vegetation, with shell fragments sometimes used to line the nest. They usually produce 2-3 clutches per breeding season, each with up to four eggs. These eggs are pale brown with dark brown speckles. As this nest type is very vulnerable to predators, the ringed plovers have developed a strategy to draw attention away from the eggs – the parent bird will lead a predator away from the nest by feigning an injured wing.

Oystercatcher (Haematopus ostralegus)

This species also creates scrape nests, although they can be lined with twigs or other vegetation. Laying between 1-4 eggs, only one clutch is laid per season. The eggs are similar to the ringed plover, with a pale brown background and dark brown speckles. This species, however, uses a practice called ‘egg dumping’, where they lay their eggs in a nest of another species, such as herring gulls, and allow them to raise the chicks.

Burrow

These are nests dug into the ground, riverbanks or cliffs. The UK birds that nest in burrows include puffins, some petrel and shearwater species, sand martins, shelducks and kingfishers. Many burrow-nesting birds excavate their own burrows but some use the pre-dug burrows of other species. Puffins, for example, often use empty rabbit burrows. As these nests are underground, species identification can be difficult without disturbing the nest, therefore it is best to wait for an adult bird or chick to appear. The location of the nest can also help to identify the species. Kingfishers, for example, usually occupy burrows in riverbanks.

Puffin (Fratercula arctica)

The Atlantic puffin lays a single white egg between late April to early May. The parent birds will defend the nesting site and take turns feeding the chick until it is ready to fledge, between 34-60 days after laying. During this time, the chick will remain within the nest burrow.

Cavity

Cavity nests are chambers, usually in trees. They can be excavated by the bird themselves, such as woodpeckers, but most species use natural cavities or disused nests. These species are often enticed to use nest boxes as these mimic natural cavities. The process of excavating a cavity can take, on average, around two weeks.

Eurasian Nuthatch (Sitta europaea)

The nuthatch does not create its own cavity and will often use old woodpecker nests, although they will enlarge an existing hole or, if the entrance is too large, the female will plaster it with mud to reduce the size. The nuthatch lays between 6-9 white eggs that have red speckling. The eggs are small, usually around 2cm long and 1cm wide.

Cup

A cup nest is a hemispherical nest, with a deep depression for the eggs to be housed in. It is often made of a more pliable material such as grasses and thin twigs, but some can be made of mud. These nests are built mostly by passerine birds.

Blackbird (Turdus merula)

Blackbirds usually build their nest in evergreen bushes such as ivy, hawthorn or holly, but will also nest in sheds and outbuildings. The nest is built by the female and made with vegetation such as leaves and grass, bound together with mud. The female lays 3-5 bluish-green eggs with reddish-brown blotches that are, on average, 2.9cm long and 2.1cm wide.

Song Thrush (Turdus philomelos)

This species builds a mud-lined cup nest, usually in bushes or trees. The song thrush lays between four to five eggs, which are blue with dark spots and are around 2.7cm in length and 2cm in width. They can lay between 2-4 clutches per season.

Platform

These nests are large structures, which can either be elevated or on the ground, depending on the species. They can often be much larger than the bird that built them. This nest type is often used by birds of prey, but also by other birds such as herons, cormorants, and grebes.

Great Crested Grebe (Podiceps cristatus)

Some waterbird species build nests directly on top of the water. These floating platform nests are built out of aquatic vegetation, cattails, reeds and mud. They can be anchored to vegetation to keep them from drifting away and to conceal them from predators. The great crested grebe usually lays four chalky white eggs, which are around 5cm in length and 3.7cm in width.

Osprey (Pandion hallaetus)

Usually breeding near freshwater, the osprey creates large platform nests made out of sticks, turf, driftwood or seaweed. They can be built on rocky outcrops, artificial platforms, forks in trees or even utility poles. The nests can be as wide as two metres. Osprey usually lay 2-4 whitish eggs with reddish-brown splotches. The eggs are quite large at 6.2cm long and 4.5cm wide.

Sphere

A few UK species create sphere nests, round structures that are completely enclosed apart from a small entrance opening. The entrance is usually on the side as it allows for protection from the rain. These nests can be made from mud, vegetation, or woven twigs and are commonly covered on the outside with moss, lichen or other camouflaging vegetation.

Long-tailed Tit (Aegithalos caudatus)

These nests can be identified by shape but also by construction material. The long-tailed tit uses lichen, feathers, spider egg cocoons and moss to create its nest. The nests are usually suspended in gorse, bramble bushes or high up in tree branches. The lichen is usually used to line the outside as camouflage and the feathers line the inside as insulation. The long-tailed tit has one brood per season and lays between 6-8 eggs, but can lay as many as 15. The eggs are white with reddish-brown speckles.