Hoopoe – A blog by nhbs – Page 8 – The NHBS Conservation Hub

Wilder Sensing: An Interview with Geoff Carss

Wilder Sensing, founded in 2021, is bringing innovative techniques to conservation, providing additional insights into biodiversity. This promising tech start-up featured on Springwatch this Wednesday (12th June), showcasing the applications of this innovation. We had the opportunity to chat with Geoff Carss, CEO of Wilder Sensing, on the organisation, its role in conservation and the future of technology in the field.

Can you share with us why Wilder Sensing was founded and what the company is involved in?

Wilder Sensing was founded to ensure that anyone can collect high-quality, long-term biodiversity data. There are many different ways of doing this, but we focus on sound. By recording 24/7 for weeks, or even months, you can build up a very rich picture of what is present in an environment. The technology we use is low-cost with limited bias, and it is easy to use, even for non-professionals. It’s not perfect, especially because we are focusing on birds at the moment. Not all birds make much noise – some make very subtle noises which we can’t pick up – but for most species it works well.

Can you tell us about the capabilities of Wilder Sensing technology and the insights that it can provide for a given environment?

We work with our customers to agree on survey patterns and how many recorders should be deployed on each site. The customer uploads their audio files to our website, and once they have arrived, we automatically process them using machine learning. It takes us around 20 seconds to process an hour-long file, and we can process many in parallel. During this, the technology checks every three seconds to see if a sound has been detected – every sound gets a species match, and a probability is assigned. So, for instance, the technology will be 92% certain that it has detected a Robin. Through this, we can give a species richness assessment, which is a species list at the moment. Our technology is currently unable to tell us how many individuals there are in a given space – there could be one very noisy bird, or ten very quiet ones.

However, bioacoustic surveying technology does not remove the need for ground truthing. It is still important to get the baseline. Ecologists will find species that we don’t pick up. And the converse is true as well. We can find 20-30% more species when combining acoustic and traditional surveys. We are also working on other approaches for the future, like triangulation, which could identify exactly where a sound is coming from.

Over 45,000 records were species-matched in the Peruvian Amazon. Image by Wilder Sensing.Can you tell us about the current projects that you are involved in and the role that bioacoustics played in conservation?

We’re involved with a whole raft of different projects. We are working with environmental consultancies, Wildlife Trusts and NGO’s using acoustic technology for long-term surveying. Wendling Beck in Norfolk is a site that we have been working on for around 18 months. We realised that Skylarks are using one small part of the site, but you don’t see this until you look at the data – when you are just walking around, you don’t make that connection. If you look at some species, you might think that you have a ubiquitous habitat, but when you start looking at the distribution of birds and their calls, you may find that there are many times more calls in one part of the site. If you were to redevelop an area, you would probably lose some species altogether, but going into a development project, knowing that’s a likely ecological consequence, is really important and that is why acoustic technology is so valuable.

What is the future for AI in conservation? Where do you think its applications could take us over the coming years??

I think it has a lot to contribute. To get good, accurate data you need highly skilled ecologists, people that really understand bird sound – it takes years to build those skills. I think the role will change so that ecologists will get more involved in survey design and interpreting the data to understand the consequences of a project. It becomes much more evidence-based and more quantitative. We have some customers who deploy up to 20 recorders, and you can get a quarter of a million acoustic records on each device. With that amount of data, you can start to ask different questions and we can see all kinds of behaviours that we couldn’t see before.

In the South-west, some farmland was purchased to develop into allotments and after digging, they found that Skylarks were nesting on-site. Biodiversity Net Gain (BNG) does not look at species, so a habitat survey would not record Skylarks in the area. If acoustic recorders had been deployed on site, ecologists would know they were present – so well-rounded data will also help developers plan better, mitigating issues from the onset of construction. The BNG survey was designed to be consistent and relatively easy to use, and species surveys could prove to be more difficult because of inconsistencies and methodologies etc. With AI we can move to a new level of understanding. If you just stick the recorder out, it is consistent in how it works and removes bias.

Over 4,000 calls were detected from Meadow Pipits at Wendling Beck. Image by Kev Chapman via Flickr.

For those interested in bioacoustics, it is worth noting that you will be holding webinars from July. What can we expect from these sessions?

We have three sessions lined up. The first one is on 7th July and is about measuring nature using sound. It’ll dig into both how the technology works and how it compares against other methods, and hopefully we’ll have an open discussion around its strengths and weaknesses. The session is intended for people who are interested in the subject, and we will go through some examples.

This will be followed by two in the autumn, which are more technical and are perhaps more suited to professional ecologists. These sessions will be touching on some of the technology behind Wilder Sensing and some of the ways it should and shouldn’t be used.

What is Wilder Sensing hoping to achieve over the next decade?

I am hoping to move onto other taxa, the obvious ones being insects and bats. We would also like to look at triangulation as well – if we can triangulate how birds and bats are using a landscape, we can use this to help inform better environmental management. I think this data will be used with other environmental data in the future. People doing nature restoration or project planning need to understand the water quality, air quality, the climate etc. to get a better environmental outcome. And even forward-looking companies, we can look at their supply chain as well.

An acoustic sensor deployed at Honeygar Farm. Image by Wilder Sensing.

Increasingly the media are reporting on the quietening of British soundscapes, a symptom of the biodiversity and climate crisis we are facing. How do you think Wilder Sensing will adapt to an increasingly quiet environment? Will technology need to adapt to keep up?

Wilder Sensing technology will quantify exactly what is happening in the biodiversity crisis. I have a copy of the iconic Silent Spring by Rachel Carson, which was published 60 years ago, and we haven’t learned from that. I think this type of technology will hold a mirror up to people to show exactly what is going on. I would love to get a good quality recording from 50 years ago, maybe two or three hours of dawn chorus in woodland, and go back to the same time of year in the same place (assuming it still exists) and compare it. Showing exactly that this is the difference in diversity.

To find out more about the innovative work by Wilder Sensing, their blog features some interesting case studies on the applications of their technology and they are also active on LinkedIn. For more information on Wilder Sensing and their product, email info@wildersensing.com.

The NHBS Guide to UK Finch Identification

Finches, in the family Fringillidae, are small to medium-sized birds, often having colourful plumage and short, triangular beaks, though this can vary depending on food preference. They’re found across the world, excluding Australia and the polar regions, and include more than 200 recorded species. The family Fringillidae is split into two subfamilies: Fringillinae and Carduelinae. In the UK, there are more than 15 finch species with breeding populations, along with several migrants and occasional visitors.

Hawfinch (Coccothraustes coccothraustes)

A Hawfinch perched on a snapped twig in the centre of frame — Hawfinch by Luiz Lapa via Flickr.

Distribution: Mainly found in southern England, with populations in the north and south of Wales as well as southern Scotland.

Habitat: Woodland, particularly forest canopies.

Size: Length: 18cm, Wingspan: 31cm

BoCC5 status: Red

What to look for: This is the largest finch in the UK, with a large head and thick beak. They are mainly a rusty brown colour, with a darker brown back and wings. Their white undertail, tail tip and wing bars are easy to see in flight. Their head is a warmer orange-brown and they have a grey band around their neck. The black border to the base of their beak stretches down the front of their throat and towards the eye. The prominence of these features can vary between individuals, with females usually paler than males.

Bullfinch (Pyrrhula pyrrhula)

a male bullfinch with a bright red breast sitting on a branch — Male Bullfinch by F. C. Franklin via Flickr

Female Bullfinch by Luiz Lapa via Flickr

Distribution: Widely distributed across Britain and Ireland.

Habitat: Woodlands, orchards and hedgerows.

Size: Length: 14.5–16.5cm, Wingspan: 22–26cm

BoCC5 status: Amber

What to look for: A larger species of finch, the Bullfinch has a thick, black bill and distinct colouring. Males have a vibrant pink-orange breast, with a contrasting white rump, grey back, black cap and tail. Females are duller in colour, with a light reddish-brown breast and back.

Goldfinch (Carduelis carduelis)

A goldfinch sat on a small branch — Goldfinch by Caroline Legg via Flickr

Distribution: Widespread throughout England and Wales, largely absent in upland areas such as northern Scotland

Habitat: Urban greenspaces, heathland and commons with seeding plants such as thistles, farmland, wetlands and woodland.

Size: Length: 12cm, Wingspan: 21–25.5cm

BoCC5 status: Green

What to look for: A recognisable and colourful finch, the Goldfinch has a bright red face with white cheeks and a black crown. Its golden-brown back is framed with black wing edges and yellow wing patches. Both males and females look alike.

Greenfinch (Chloris chloris)

Greenfinch on a tree branch — Greenfinch by Andy Morffew via Flickr

Distribution: Widespread, largely absent in upland areas such as northern Scotland

Habitat: Urban greenspaces, heathland and commons with seeding plants such as thistles, farmland, wetlands and woodland.

Size: Length: 15cm, Wingspan: 26cm

BoCC5 status: Red

What to look for: Adult Greenfinches are, as their name suggests, green, but their wings and tail are mostly grey with a bar of bright yellow. They have a grey patch on their cheeks and a pink bill and legs. They have two distinct calls: a long wheezing call and a more melodic call consisting of trills and fast whistles.

Chaffinch (Fringilla coelebs)

Chaffinch standing on grass — Chaffinch by Sid Mosdell via Flickr

Distribution: Widespread.

Habitat: Woodlands, hedgerows, urban greenspaces, farmland and heathland.

Size: Length: 14.5cm, Wingspan: 24.5–28.5cm

BoCC5 status: Green

What to look for: One of the most common garden birds in the UK, the Chaffinch has a loud, distinctive song and colourful plumage. Males are memorable for their chestnut-orange breast and back, contrasted with a blue-grey crown and white shoulder patches. Females are less colourful, featuring a light brown breast and back.

Linnet (Linaria cannabina)

Linnet on a small branch — Linnet by Alan Shearman via Flickr

Distribution: Widespread in Britain and Ireland, absent from upland north Scotland.

Habitat: Commons, heathland, farmland, saltmarshes and urban greenspaces.

Size: Length: 13.5cm, Wingspan: 21–25.5cm

BoCC4 status: Red

What to look for: A smaller, slenderer finch, the Linnet is historically known for its melodic song. The male Linnet boasts a crimson forehead and chest, with a grey head and brown back. Females are paler in appearance and showcase the characteristic streaky brown hue of the species, though lacking reddish patches. Linnets may be found in large flocks during winter, often mixing with other seed-eating finches.

Siskin (Carduelis spinus)

Male Siskin on a pine branch — Male Siskin by Caroline Legg via Flickr

Female Siskin on a broken piece of wood — Female Siskin by Caroline Legg via Flickr.

Distribution: Found across the UK, most abundant in Scotland and Wales.

Habitat: Tree tops in coniferous and mixed woodland, urban greenspaces.

Size: Length: 12cm, Wingspan: 20–23cm

BoCC5 status: Green

What to look for: A streaky green finch with a narrow bill, the Siskin is a resident breeder in the UK. Males have a distinct black crown and chin, with yellow cheeks and breast, and yellow streaks on black wings. Less colourful, females are a dull yellow on the head and back, with a streaky breast and underside. Both have a forked tail. Often found gathered in groups over winter with other finches.

Serin (Serinus serinus)

Serin bird sitting on a small branch covered in lichen — Serin via RSPB

Distribution: An occasional visitor in southern England and the Channel Islands

Habitat: Coniferous woodland, farmland and urban greenspaces

Size: Length: 11–12cm, Wingspan: 18–20cm

BoCC5 status: Not assessed, former breeder

What to look for: A small, brown streaky finch with a stubby bill. Males feature a vibrant buttercup-yellow head and breast, with brown patches on the crown and cheeks. Females are less eye-catching, browner in colour with soft yellow hues. Both males and females have a forked tail and yellow streaks on brown wings.

Common Rosefinch (Carpodacus erythrinus)

Common Rosefinch breeding-male sitting on a branch — Common Rosefinch breeding male by Birds of Gilgit-Baltistan via Flickr

Common Rosefinch female by Imran Shah via Flickr

Distribution: A rare visitor, mainly observed in the northern Isles, east coast of Scotland and southern England.

Habitat: Woodland, scrubland and urban greenspaces.

Size: Length: 13.5–15cm

BoCC5 status: Not assessed

What to look for: Common Rosefinch are similar in size to a Chaffinch. Males have a striking scarlet head, breast and rump. The wings are a woody-brown, contrasted with a pale, whitish underside. Juveniles and adult female Common Rosefinch have a lightly streaked olive-brown plumage and a short beak. Juveniles are mostly observed in autumn during migration, and adult males may be seen in spring.

Common Crossbill (Loxia curvirostra) and Parrot Crossbill (Loxia pytyopsittacus)

Common Crossbill:

Common Crossbil (male) by Ashley Wahlberg via Flickr

Red Crossbill (female) by Luiz Lapa via Flickr

Parrot Crossbill: Female (left) by Tero Laakso via Flickr, Male (right) by Alan Shearman via Flickr

Parrot Crossbill (female) by Nina Laakso via Flickr

Red Crossbill (male) by Ashley Wahlberg via Flickr

Distribution: Common Crossbill: widespread throughout Britain and Ireland. Parrot Crossbill: rare resident in Caledonian pinewoods of north-eastern Scotland.

Habitat: Coniferous woodland.

Size: Common Crossbill: Length: 16cm, Wingspan: 29cm. Parrot Crossbill: Length: 16–18cm, Wingspan: 30–34cm

BoCC5 status: Common Crossbill: Green, Parrot Crossbill: Amber

What to look for: Common Crossbill: Named for their distinctive crossed beak, the Common Crossbill is a large finch with a forked tail and colourful plumage. Showcasing a vibrant, brick-red head, breast and underside, a male Common Crossbill is easily distinguished from its female counterpart. Instead of the characteristic vibrant plumage, females have an olive-green colour on the head, breast and belly, with a yellow rump and grey wings. Juveniles have a grey-brown streaky appearance. Parrot Crossbill: A slightly larger species, with a deeper, heavier bill, the Parrot Crossbill is difficult to distinguish from their common cousins. Males feature a similar, orange-red head and breast with muted grey wings and tail. Females also have olive-green plumage with the characteristic crossed bill.

Did you know? A close relative, the Scottish Crossbill (Loxia scotica), is endemic to the Caledonian pine woods of Scotland. They are the only bird to be found in these forests and nowhere else in the world.

Common Redpoll (Acanthis flammea) and Lesser Redpoll (Acanthis cabaret)

Common Redpoll by Lisa Hupp/USFWS via Flickr

Distribution: Common Redpoll: Visitor to the UK in winter during migration, seen in eastern Scotland and England. Lesser Redpoll: Widespread.

Habitat: Birch, Larch or Alder woodland, urban greenspaces, farmland.

Size: Common Redpoll: Length: 12–14cm, Wingspan:20–25cm. Lesser Redpoll: Length: 12–13cm, Wingspan: 22cm

BoCC5 status: Common Redpoll: Red, Lesser Redpoll: Not Assessed.

What to look for: Common Redpoll: Paler than their vibrant cousins, Common Redpoll are streaky brown from above, with a pale white plumage from below. Displaying a vibrant red forehead and pink breast in summer, they are remarkably similar to their smaller cousins. Lesser Redpoll: Slightly smaller, Lesser Redpoll are a similar streaky brown with red colouring on the crown and pink-red breast in summer. They have a black bib under a small, yellow bill. Females appear similar to male counterparts, without the pink flush on the breast. Juveniles are streaky brown and do not have a red crown or pink flush.

Twite (Linaria flavirostris)

Distribution: Found in upland England, Wales and coastal Northern Ireland during summer months. East coast of England in winter. Widespread in Scotland.

Habitat: Moorlands, coastal saltmarshes, coastal crofts.

Size: Length: 14cm, Wingspan: 22–24cm

BoCC5 status: Red

What to look for: A small, streaky brown finch with a forked tail and a short bill. Twite have a brown back with dark streaking, a pale underside and streaking on the breast. During summer months the bill is grey, where it turns yellow for winter. A rich golden-brown face and upper breast are also present during winter months. Males are distinguished by a pink rump during summer.

Brambling (Fringilla montifringilla)

Distribution: Widespread in the UK during winter

Habitat: Beech woodlands, hedgerows, stubble fields, farmland and urban greenspaces.

Size: Length: 14cm, Wingspan: 26cm

BoCC5 status: Green

What to look for: A brightly marked winter visitor, Brambling are of similar size to a Chaffinch. They have a rust-orange hue over the breast and shoulder which is more vibrant and extensive among males. Males have a blue-grey head which transforms to a sleek black during summer breeding. During winter, they sport a flecked black and brown plumage, contrasting a white belly and rump. Wings are dark in colour with orange bars. Females have a softer orange breast than males, and a brown head with two pronounced dark lines running across the head and down the nape. When part of a larger flock, Brambling are recognisable for their white rump and a yellow bill during winter.

The NHBS Guide to UK Birds of Prey

As we enter the warmer months, many of us will find ourselves wandering through nature more often, perhaps while camping or taking an evening walk through wild areas. We might encounter birds of prey during these times, and many of us will ask ‘Which one is that?’. Here we look at a selection of the 15 birds of prey in the UK, covering every group of predatory bird aside from vultures.

Red Kite (Milvus milvus)

A red kite shown flying from below with its wings spread out. — Red Kite. Image by Countryfile.

Conservation Status: On the Green list under the Birds of Conservation Concern 5. Listed as least concern under the IUCN Red List.

Distribution: Widespread and common throughout the UK. Estimated 4,600 breeding pairs.

Identification: Red Kites are large birds with a wingspan of up to 2m. Easily identified by their angled red wings, reddish-brown streaky body and a long, forked tail. These birds have a distinctive white patch underneath their black-tipped wings. Adults have a grey head and a yellow beak with a grey-black hook.

Best places to spot: Red Kites can be seen year-round and are active during the day. They can be found in woodland, open countryside, farmland and increasingly in suburban areas and towns. The Chilterns, central Scotland and southern England are great places to spot Red Kites in the UK, although the species is commonplace and can be found across the country.

Sparrowhawk (Accipiter nisus)

Grey sparrowhawk resting on a mossy treestump — Sparrowhawk. Image by Caroline Legg via Flickr.

Conservation Status: On the Amber list under the Birds of Conservation Concern 5.

Distribution: Widespread throughout the UK except for the Scottish Highlands and offshore islands. Around 31,000 breeding pairs.

Identification: A small bird of prey with a wingspan of around 60cm, the Sparrowhawk is around the size of a blackbird (although females can be as large as a Feral Pigeon) and weighs up to 300g. Males have a bluish-grey back and cap with white and orange barred underparts. Females are browner in colouration and have brown/grey barring on their underside. The species have broad, rounded wings and bright yellow/orange eyes. The chin and cheeks of both males and females are a reddish orange.

Best places to spot: Sparrowhawks can be found year-round in grassland, woodland, heath and moorland, farmland and suburban areas. Good places to spot Sparrowhawks are: Bowers Marsh, Basildon; Blean Woods, Canterbury and Wolves Wood, Ipswich. The Sparrowhawk is also a good species for garden watchers – often feeding on finches, tits and sparrows, you may be fortunate enough to see one in your own garden.

Peregrine Falcon (Falco peregrinus)

Peregrine Falcon resting on a tree branch — Peregrine Falcon. Image by Countryfile.

Conservation Status: On the green list under Birds of Conservation Concern 5. Protected under the Wildlife and Countryside Act 1981.

Distribution: Nesting occurs in the north and south-west of England, also in Wales and Scotland on coastal cliffs. There are around 1,750 breeding pairs in the UK.

Identification: The Peregrine Falcon has a large wingspan measuring up to 1.2m and a muscular, heavy-set profile. From above, this bird appears a dark slate-grey with pointed wings and a shorter tail. From below, it appears white with thin, dark stripes across the chest and belly. This species also has a white throat and cheek with a black mask and moustache.

Best places to spot: Peregrine Falcons can be found nesting along coastal cliffs and rocky coastlines. They may also be found in urban areas as their range expands and have famously been found at the top of Derby Cathedral. Great places to spot Peregrine Falcons include Ramsey Island, Pembrokeshire; Saltholme Nature Reserve, Cleveland and Rainham Marshes Nature Reserve, Essex.

Osprey (Pandion haliaetus)

Osprey flying in-air with its wings widespread — Osprey. Image via BBC Wildlife.

Conservation Status: On the amber list under Birds of Conservation Concern 5. Protected under the Wildlife and Countryside Act 1981.

Distribution: Osprey can be seen from March to September before they migrate to west Africa for the winter. Osprey breed in Scotland, Wales, Cumbria and the east Midlands. Breeding populations are estimated to be between 200–250 pairs.

Identification: Ospreys are large birds with a wingspan of up to 1.7m. The species have brown and white plumage – a dark brown upper contrasting with a white chest, underside and head. The wings are long, barred and appear angled during flight. A ‘necklace’ of slightly darker, mottled colouration may be present, and is more visible in females.

Best places to spot: Osprey have a fish-based diet so are best spotted in freshwater and wetland habitats. Loch Ruthven, Lock Lomond and Loch of Kinnordy are reported to be good locations for Osprey spotting.

Common Buzzard (Buteo buteo)

Common buzzard resting on a wooden post — Common Buzzard. Image by Caroline Legg via Flickr.

Conservation Status: On the green list under Birds of Conservation Concern 5.

Distribution: The UK’s most common bird of prey, the Common Buzzard can be seen year-round almost everywhere in the UK. The population has an estimated 63,000 breeding pairs.

Identification: A large bird with broad, rounded wings, the Common Buzzard has a wingspan of up to 1.2m. In flight, their wings have a distinctive ‘V’ shape with dark coloured wingtips. Their plumage can vary from shades of dark brown to paler hues, and individuals often have a ‘necklace’ of colour beneath the breast. Their underside is white, some more so than others, and their tail feathers have light brown barring. Their beak is sharp and yellow in colour with a dark brown/black hook.

Best places to spot: Buzzards can be found in farmland, grassland, woodlands and urban areas with green spaces. West Sedgemoor Nature Reserve, Taunton; Fairy Glen, Isle of Skye and Labrador Bay, Torquay are reported to be good places to spot these birds.

Kestrel (Falco tinnunculus)

Kestrel resting on a wooden fence — Kestrel by Andy Morffew via Flickr.

Conservation Status: On the amber list under Birds of Conservation Concern 5. Populations are declining.

Distribution: This species is widespread and can be found year-round across the UK, although absent from north-west Scotland, central Wales and Shetland. There are an estimated 46,000 breeding pairs.

Identification: Slightly larger than a Feral Pigeon, Kestrels have a wingspan up to 80cm. This species is often seen hovering mid-air, and has distinctively pointed wings. The head and tail of male Kestrels is grey, with a black band at the bottom of the tail feathers. Their backs are gingery-brown with a black-speckled cream underside. Females have a more uniform colouration, with a lighter brown plumage and dark bands on the wings and tail. The chest and underside have a lighter, almost-cream plumage with brown spots. The species have a short, yellow/grey beak with a sharp hook.

Best places to spot: Kestrels can be found on open grassland and farmland, wetlands and urban areas. This species is often observed by roadside hedges and may be seen perching on fences or lampposts.

Goshawk (Accipiter gentilis)

Goshawk resting on a mossy fallen tree — Goshawk by Andy Morffew Via Flickr

Conservation Status: On the green list under Birds of Conservation Concern 5. Protected under the Wildlife and Countryside Act 1981.

Distribution: Found dispersed across the UK in localised populations. Strongholds are present in south and east Scotland, northern England and Wales. There are an estimated 620 breeding pairs.

Identification: This species has a wingspan of up to 120cm and is around the size of a Buzzard. Goshawks have broad wings which appear grey on top. Females have a slate-grey upper and males have a blue-grey upper, both with white, barred underparts. The species has long, thick legs and a rounded tail. Goshawks also have a distinctive white line above their eyes.

Best places to spot: This species can be seen year-round in wetlands, farmland and coniferous woodland. Goshawks are commonly seen in late winter and spring during aerial displays over their breeding grounds. Sites of particular interest are Kielder Forest, New Forest and the Forest of Dean.

Merlin (Falco columbarius)

Merlin resting on a fence post — Merlin by Veir via Flickr.

Conservation Status: On the red list under the Birds of Conservation Concern 5. Protected under the Wildlife and Countryside Act 1981.

Distribution: Widespread across the UK. Merlin are seen nesting in north and south-west England, Wales and Scotland. Up to 1,500 breeding pairs are estimated in the UK.

Identification: The UK’s smallest bird of prey, the Merlin is around the size of a Blackbird (Turdus merula). This species is often seen low to the ground or hovering in breezy areas. Males have blue-grey plumage from above with cream-slightly brown underparts with black streaks. Females also have dark streaking underneath but are instead more brown in colour. The species has broad wings with pointed tips (wingspan up to 60cm) and a square, blunt tail. As with other raptors, they have yellow legs and a grey tipped beak.

Best places to spot: This species can be seen year-round in moorland, coastal marshes and farmland where they nest in heather. Orkney, Loch Sunart and Dee Estuary are reported to be excellent places to spot Merlin.

Tawny Owl (Strix aluco)

Tawny owl resting on a mossy tree stump in front of shallow water — Tawny Owl by Caroline Legg via Flickr

Conservation Status: On the amber list under Birds of Conservation Concern 5.

Distribution: Widespread in the UK, but absent in Northern Ireland and the Isle of Man. An estimated 50,000 breeding pairs in the UK.

Identification: Tawny Owls are the largest common owl in the UK and have a wingspan up to 100cm. They appear a mottled reddish-brown with a paler underside. Their large, round head has a dark ring around its border, and they have characteristically large dark eyes. The species has an olive-yellow hooked beak

Best places to Spot: Tawny Owls can be spotted year-round in broadleaved woodland, farmland and urban green spaces.

Barn Owl (Tyto alba)

Conservation Status: On the green list under Birds of Conservation Concern 5. Protected under the Wildlife and Countryside Act 1981.

Distribution: Widespread across the UK but absent from the Scottish Highlands. An estimated 4,000 breeding pairs.

Identification: Barn Owls are best known for their distinctive heart-shaped face and snowy white feathers. Their back and wings are mottled grey and beige, with a pure white underside. They have a white face with large black eyes and a short, curved beak.

Best places to spot: Barn Owls can be seen year-round at dawn and dusk. The species may be seen in farmland, grassland and wetland. Strumpshaw Fen, Norfolk; Middleton Lakes, Staffordshire and Bempton Cliffs, East Riding of Yorkshire are reported to be good places to spot Barn Owls in the UK.

This Week in Biodiversity News – 3rd June

Wildlife

Ambitious project in south-west Wales aiming to restore one of the world’s most important habitats is getting underway. Two species of seagrass, Eelgrass (Zostera marina) and Dwarf Eelgrass (Zostera noltii) are being grown in ponds fed with seawater pumped in from the nearby Carmarthen Bay, and over the past two years alone this project has processed 1.5 million seeds. These have subsequently grown tens of thousands of plants that are now being reinstated in the wild to help restore the UK’s underwater seagrass meadows, 90% of which have vanished in the past 30 years alone.

Photo taken with a camera lens half under water and half above water showing a thick seagrass forest. — Seagrass near body of water during daytime by Benjamin L Jones via unsplash.

Thriving Ecuador bird tourism is incentivising farmers to turn their agricultural land into nature reserves. Ecuador is home to over 1,600 species of bird, almost double the number found across the whole of Europe. As the country’s birding tourism grows, increasing numbers of farmers are turning their agricultural land into nature reserves to help preserve their stunning local wildlife. This is not only benefiting nature, but also the country’s economy as wildlife tourism offers a much more profitable livelihood than farming, resulting in some farmers expanding their land’s potential further than any traditional farming model would have provided.

Critically endangered Devils Hole Pupfish population reaches a 25 year high. This rare species lives in the smallest known desert habitat of any vertebrate and is only found in the upper areas of a single limestone cave in the Mojave Desert, Nevada, where the whole population resides on a single shallow rock shelf. They have evolved to be able to withstand harsh desert conditions, including very high water temperatures and extremely low oxygen levels. In 2013, their population fell to just 35 individuals, but careful conservation efforts over the past 11 years have offered hope for this rare species as their population has now reached a 25-year record high of 191 fish.

Environment

The North Atlantic is set to be hit by more than double the normal number of hurricanes this season, warns NOAA. Researchers have suggested that this is predominantly due to high sea surface temperatures as a result of the upcoming transition between El Niño and La Niña which helps these storms grow more easily. Although there is no evidence showing that climate change is a contributing factor, it is likely to exacerbate the severity of these weather patterns. Contrastingly, NOAA have predicted a below-normal hurricane season for the central Pacific region where El Niño and La Niña work in opposition.

Hurricane Matthew hits Haiti aerial photograph. — Hurricane Matthew hits Haiti by NASA Goddard Space Flight Center’s photostream, via flickr.

Purbeck Heath begins its transformation into an ancient savannah habitat to help precious species thrive. The National Trust’s lead ecologist for Purbeck, David Brown, explained that the project hopes to use domestic grazers such as wild cattle, pigs, ponies and deer to mimic their wild ancestors and shape the 1,370 hectares of open grassland in Dorset into a dynamic, complex and biodiverse ecosystem. Purbeck Heath is already one of the most diverse areas in the UK, and this project will aid the recovery of rare and threatened species such as Purbeck Mason Wasps, Heath Tiger Beetles and Sand Lizards.

Climate

Increased ocean temperatures are undercutting the Thwaites Glacier and causing glacial melt from below. This glacier is currently losing 75 billion tons of ice per year, accounting for nearly half the total ice lost from Antarctica per annum. Scientists have revealed that an estimated 150 million kilowatts of thermal power are injected into the ice with each undercutting intrusion, which could melt 20 meters of ice off the bottom of the glacier each year. Recent simulation to assess the effects saltwater invasion may have on retreat rates has revealed it could double the overall rate of ice loss for some glaciers.

Thwaites Glacier photograph showing the edge of the glacial shelf with some small icebergs floating along the side of it. — 22-01-21 04 Thwaites Glacier by Felton Davis, via flickr.

New research reveals the catastrophic effects of extreme heat, deoxygenation and acidification in the oceans due to fossil fuels and deforestation. In the top 300 meters of affected oceans, these compounded events are lasting three times longer and are six times more intense than in the 1960s. A fifth of the world’s ocean surface is susceptible to all three of these stresses at once, which has been further exacerbated in recent decades as extreme weather conditions have become more intense. Scientists warn that the extra CO₂ absorbed by the oceans has increased the temperature and acidity of seawater, is dissolving the shells of sea creatures and starving the ocean of oxygen. This series of events is comparable to those experienced at the end of the Permian period 252 million years ago when the planet experienced the largest known extinction event in its history.

No Mow May 2024: An Update

Each year, Plantlife launch their national campaign of #NoMowMay. This initiative encourages people across the UK to allow their garden lawns to grow wild in the spring, providing vital habitats for many species. Here at NHBS, this is our fourth year taking part – each year in awe of the diversity of species in our lawn. Find our previous No Mow May blog posts on our conservation hub. Here, we give an update on the species we saw throughout last month.

The wilder lawns that develop during No Mow May provide a haven for invertebrate species in our gardens. At NHBS, we saw a whole host of insects in and around our lawn last month, from wasps to weevils and Green-veined White butterflies. Other highlights have included:

A Small Yellow Underwing (Panemeria tenebrata) – a diurnal moth species frequenting meadows and grassland.

Mayfly (Ephemera vulgata) – found near rivers and areas of freshwater between May and August.

Volucella bombylans – a bumblebee-mimicking hoverfly common throughout the UK.

Beautiful Demoiselle (Calopteryx virgo) – a damselfly with a striking blue, metallic body found near rivers and streams.

And some beautiful wildflowers, including Red Clover (Trifolium pratense) and Perforate St John’s Wort (Hypericum perforatum). Here are some of our favourites:

The Southern Marsh Orchid (Dactylorhiza praetermissa) – the most common and widespread of marsh orchids, features spectacular purple petals.

Bee Orchid (Ophrys apifera) – named for its mimicry, the Bee Orchid self-pollinates due to a lack of appropriate pollinators in the UK. The specimen on our lawn has yet to bloom (left), but we have a striking image from last year showcasing the mimicry of this species (right).

Cuckooflower (Cardamine pratensis) – also known as ‘Lady’s-smock’, this flower is one of the first signs of spring, often found near riverbanks, wet meadows and grassland.

Germander Speedwell (Veronica chamaedrys) – considered a ‘good luck charm’ for travellers, this plant has a beautiful blue flower and is found in meadows, woods and hedgerows across the UK.

Our Product and Purchasing Manager, Mark, has documented the progress of his local park during No Mow May. Towards the end of the month, the green expanse had varying lengths of grass and plenty of wildflowers, encouraging pollinating species – a great example of how local councils can boost biodiversity in public spaces.

And our Sales and Marketing Manager, Adam, has grown his lawn throughout May creating a corridor for local wildlife brimming with wild buttercups, dandelions and many other self-seeded plants.

No Mow May is a fantastic initiative to engage with, attracting homeowners, businesses and local councils with its wealth of benefits. If you have enjoyed taking part, then Let it Bloom June could be a great opportunity to continue supporting your garden wildlife. This scheme simply involves continuing the No Mow May philosophy throughout the summer with less garden maintenance. You may choose to allow your entire garden to grow wild or leave some areas untouched for wildlife.

Have you taken part in No Mow May? Share your pictures with us via Twitter, Instagram and Facebook.

Book Review: Crossings: How Road Ecology Is Shaping the Future of Our Planet

***** An eye-opening and thought-provoking reportage

The road to hell might be paved with good intentions, but the roads to pretty much everywhere else are paved with the corpses of animals. In Crossings, environmental journalist Ben Goldfarb explores the outsized yet underappreciated impacts of the ~65 million kilometres of roads that hold the planet in a paved stranglehold. These extend beyond roadkill to numerous other insidious biological effects. The relatively young discipline of road ecology tries to gauge and mitigate them and sees biologists join forces with engineers and roadbuilders. This is a wide-ranging and eye-opening survey of the situation in the USA and various other countries.

As Goldfarb points out, roadkill is as old as the road but the phenomenon went into overdrive with the invention of the combustion engine and a new-found need for speed that menaced humans and animals alike. With the morbid curiosity typical of biologists, Dayton and Lilian Stoner published the first tally of motorcar casualties in 1925, in the process diagnosing “a malady with no name” (p. 16), as the word roadkill would not be coined for another two decades. The word road ecology was only coined in 1993 by Richard Forman, though it was translated from the German Straßenökologie that was coined in 1981 by Heinz Ellenberg.

As a discipline, road ecology both studies the impact of roads and formulates solutions. Particularly common, and featured extensively in this book, are wildlife crossings. Underpasses serve many animals but others have different needs such as overpasses or canopy rope bridges. Amphibians and reptiles are given a helping hand with toad tunnels and bucket brigades. Fish migration is being restored by retrofitting culverts that are better navigable.

An empty long, winding road running through trees going down a hill. — The long and winding road by Mussi Katz, via flickr.

To us, roads are the unnoticed connective tissue that links places of extraction with industry and commerce, and shuttles commuters between home and work. For other animals, they are barriers: despite the good intentions, wildlife crossings cannot serve all animals equally and cannot be constructed everywhere. Millions of animals still die in collisions every day. Goldfarb addresses the very real concerns of extirpation, habitat fragmentation, interrupted migrations, and noise pollution. With roads come humans who bring deforestation, hunting, real estate development, urban sprawl, tourism, etc.

Amidst this litany of harms, Goldfarb features several topics that will be eye-opening even to ecologists. There is the little-known history of how the US Forest Service constructed one of the world’s largest road networks of now mostly abandoned forest tracks. Roads also feed a diverse community of scavengers that includes humans; a necrobiome that “airbrushes our roadsides, camouflaging a crisis by devouring it” (p. 181). In Syracuse, Goldfarb faces the racist legacy of interstate highways that were bulldozed straight through Black and Latino neighbourhoods. Plans are now afoot to reverse this wrong, move the highway, and create a community where people can again walk to their destinations. In a brilliant flourish, Goldfarb connects this back to the book’s main topic: “Road ecologists and urban advocates are engaged in the same epic project: creating a world that’s amenable to feet” (p. 287).

Badbury Rings Avenue in Dorset showing a long downhill slope with large oak trees either side. — Badbury Rings Avenue – No HDR by JackPeasePhotography, via flickr.

So far, so good. Goldfarb’s writing shines and certain turns of phrase are memorable. I was initially concerned how US-centric this book would be. Though weighted towards US examples, Goldfarb also visits Wales, Costa Rica, Tasmania, and Brazil, and discusses several European initiatives.

Despite the gloomy picture, there are some encouraging signs. The US Forest Service has started decommissioning parts of its road network. Brazil, meanwhile, shows what government regulation can achieve. Here, highway operators are held legally responsible for dealing with the harm and costs resulting from collisions. Contrast this with the USA, Goldfarb observes sharply, where individual drivers are blamed for collisions. This “deflects culpability from the car companies building ever more massive SUVs and the engineers designing unsafe streets” (p. 295). As with addressing climate change, individual action only gets us so far; making roads safer demands systemic change, “a public works project, one of history’s most colossal” (p. 296).

And yet, something nagged at me. The focus on mitigation smacks of a palliative solution and Goldfarb concedes the limitations of road ecology. Crossings and fences will not stop the many other impacts of roads and risk becoming “a form of greenwashing […] a fig leaf that conceals and rationalizes destruction” (p. 265). As with other environmental problems, should we not first focus on abandoning or reducing certain behaviours, instead of turning to techno-fixes? Can we imagine something more radical? Can Goldfarb?

Tarmac country road running between two oil seed rape fields. — Country road and yellow field by Susanne Nilsson, via flickr.

To his credit, he admits wrestling with this problem. “The most straightforward solution to the road’s ills would be a collective rejection of automobility […] In the course of writing this book, I’ve felt, at times, like a defeatist—as though, by extolling wildlife passages, I foreclose the possibility of a more radical, carless future” (p. 295). I would have loved to see him explore this further in a dedicated chapter. Instead, Goldfarb comes down on the side of pragmatism. Bicycles and public transport are great for making urban areas more liveable, but most roadkill happens elsewhere. Furthermore, personal mobility is only part of the story, with logistics making up a huge chunk of traffic. The eye-opening chapter on Brazil, and the outsized influence of China’s Belt and Road Initiative that sees it invest in infrastructure globally, is a forceful reminder that the developmental juggernaut is nigh impossible to slow down. One road ecologist points out that you cannot seriously enter the discussion around roads if you oppose social and economic development, while another chimes in that, whether we like it or not, more roads will be built. Although I do not think resistance is futile, Goldfarb leaves me sympathetic to the road ecologists who are desperately trying to nudge construction projects in directions “that, if not quite “right,” are at least less wrong” (p. 270).

Goldfarb acknowledges the input of some 250 people and even then stresses his book is far from the final word on the subject. He encourages readers to take it as a starting point and read deeper, providing 43 pages of notes to the many sources of information he has used. I would additionally recommend A Clouded Leopard in the Middle of the Road by Australian road ecologist Darryl Jones which was published last year but seems to have flown under the radar compared to Goldfarb’s book. Overall, Crossings is a wide-ranging, eye-opening, and thought-provoking reportage that deserves top marks.

Author interview with Bjørn Olav Tveit: A Birdwatcher’s Guide to Norway

Norway is home to some of the most sought-after bird species in Europe, including the King Eider, Gyrfalcon, Capercaillie and Jack Snipe. A Birdwatcher’s Guide to Norway is the first guide to the birds of Norway and Svalbard, detailing over 350 of the best birdwatching sites in this country. The guide efficiently explains where and when to visit these sites, which species are present in each area, how to use tower hides and shelters, other animal species you may encounter and more. The upcoming second edition includes 265 photographs, 95 maps and comprehensive information about each site, this is an essential travel guide for anyone planning to birdwatch in mainland Norway or Svalbard.

Bjørn Olav Tveit lives in Oslo, Norway and has explored many of the country’s best birding sites throughout his life. He is a long-standing member of the Norwegian Rarity Committee for Birds and acts as the nature conservation contact for his local BirdLife Norway division. He runs bird-spotting guided tours for nature enthusiasts, composes music, authors books and works for the Norwegian Ministry of Culture.

We recently had the opportunity to talk to Bjørn about how he became interested in birdwatching, what can be expected from the second edition of his book and more.

Firstly, can you tell us a little about yourself and how you got into birdwatching?

I have been an avid, Oslo-based birder since childhood, which is more than 40 years ago. When travelling abroad with my parents as a kid, I would lose myself in the birdwatcher’s site guides for that country or region, although I was puzzled by the fact that no such book existed for Norway. Rumours were that some older and more experienced birdwatchers were in the process of writing such a book, but the years went by, and it never materialised. Not only would I need the guidebook myself, as my activity range gradually expanded beyond Oslo, but also I was embarrassed on behalf of my country by the lack of such a guide. In my eyes, at least at the time, a birdwatching site guide defines a country’s identity and level of development. So, I decided to go forward and make the guidebook myself.

For anyone that enjoyed the first release of A Birdwatcher’s Guide to Norway, what can they expect to discover in this updated edition?

A lot has changed since the first edition came out 15 years ago. This change is most eye-catching in regard to Norway’s infrastructure: roads are improving and changing course; in some places, ferries have been replaced by bridges or tunnels; new tower hides have been built, and so, all maps and text have been updated accordingly. There have been quite a few changes in birdlife as well. For example, the Barred Warbler no longer breeds regularly along the Skagerrak coast, and the numbers of most cliff-breeding seabirds have greatly reduced to a point where e.g. Leach’s Storm Petrel is no longer expected on boat trips in Lofoten. On the positive side, the population of Rustic Bunting seems to be recovering, Red-flanked Bluetail is on the move into Norway, and Great Grey Owl now breeds regularly near Oslo. Furthermore, the book has expanded to a slightly larger format, allowing for more, easier-to-read maps and even more stunning images taken by some of the best photographers in the country.

This book details over 350 birdwatching sites in Norway and Svalbard – what was your process in deciding which sites to include?

Based on my experience with guiding birdwatchers from abroad all over Norway, I have prioritised the sites that can produce the target species that birders from abroad tend to aim for. I have also included many all-round good birding sites, especially those situated close to larger towns or popular tourist attractions.

Can you share any stand-out birdwatching experiences during your research for this edition?

Oddly enough, making a birdwatching site guide is not easily combined with birdwatching! In the process, I first spent a lot of time at home, taking notes while reading trip reports and local bird magazines. Then I corresponded with over 100 local birdwatchers, who all helped me in various ways on picking the sites and giving me their opinion on how to get the most out of a birding trip in their area. Then I fired up the car engine and drove across Norway, double-checking all the theoretical information, with a focus on ensuring that a lone birdwatcher would be able to find the way and make the most of his or her birdwatching trip, solely with the help of this book. In order to visit all the included sites (and a few that were subsequently dropped), I couldn’t afford to spend as much time at each site as I would have liked to. All in all, the remarkable experience of travelling across Norway, taking in the spectacular scenery and variation in habitats and birdlife, was perhaps the most outstanding part of it all for me personally. I did see a lot of good birds along the way, though.

Fifteen years have passed since the first edition was published, and during this time environmental pressures have continued to increase for wildlife. Have you noticed any changes over this time that may illustrate these impacts?

I have witnessed a lot of negative impacts at several sites and areas, but at the same time, the general public in Norway has become gradually more concerned with nature preservation. By watching the reactions from people visiting the country from abroad, the locals have understood that they live in a country that is unique in terms of nature and wildlife. And so they have become prouder and more prone to taking better care of the environment. During the process of making this book, the environmentalist in me has been awakened to an even greater extent than before. I was particularly shocked by the urbanisation of my childhood local patch, Fornebu near Oslo, when I visited it for the first time in a long time during the making of this book. In the aftermath, I have been strongly engaged in preserving and enhancing the bird habitats there.

You mentioned observing a greater accessibility to birdwatching sites since the first edition. Are you anticipating any changes in bird behaviour resulting from this? And how can birdwatchers minimise disturbance to bird species?

One of the negative effects that birdwatching tourism may have on birds and habitats is the heightened disturbance caused by the increase in foot traffic. However, if you lead people along paths to designated hides, you reduce this risk. And you get the added bonus of getting to see the birds close up, without disturbing them. By doing this right, I hope even more people become interested in watching birds. I believe that increased awareness and interest in birds among the public is a key element in preserving birds and their habitats.

What’s next for you? Are there new books on the horizon?

I plan to make a third edition of the Norwegian version soon, because the English second edition is much better than the Norwegian one that I put out four years ago. And I have contemplated writing a book presenting the birds and sites in my home municipality west of Oslo. Furthermore, I have been waiting in vain for four decades on a book presenting the rare and vagrant birds of Norway… as the case was with the site book, maybe I will have to write it myself!

A Birdwatcher’s Guide to Norway is published by Pelagic is available to pre-order from our online bookstore.

Book Review: The Last Days of the Dinosaurs

*****A unique on the story of dinosaur extinction and its aftermath

The day an asteroid slammed into the Yucatán Peninsula some 66 million years ago is a strong contender for “the worst day in history”. The K–Pg extinction ended the long evolutionary success story of the dinosaurs and a host of other creatures, and has lodged itself firmly in our collective imagination. But what happened next? The fact that a primate is tapping away at a keyboard writing this review gives you part of the answer. The rise of mammals was not a given, though, and the details have been hard to get by. Here, science writer Riley Black examines and imagines the aftermath of the extinction at various times post-impact. The Last Days of the Dinosaurs ends up being a fine piece of narrative non-fiction with thoughtful observations on the role of evolution in ecosystem recovery.

Before delving in, a brief word on what is not in the book. Black does not discuss the history of the research that discovered evidence of an asteroid impact, such as the iridium spike and the crater. Nor does she go into the ongoing debate on the relative contributions of the asteroid and Deccan Trap volcanism. Instead, Black’s approach is to imagine a day in the life of the survivors at various time points post-impact: after an hour, a day, a month, a year, a century, all the way up to one million years. She focuses on the Hell Creek formation in western North America as it offers one of the clearest windows into the mass extinction and its aftermath. Most chapters have a short coda that looks at how life was faring elsewhere on the planet. Black’s style of choice is narrative non-fiction: she is resurrecting individual animals and imagining their lives. As she explains in her preface, to allow full immersion, she is not interrupting the flow of her story with notes and references, which are found at the back of the book. An extensive, 58-page(!) chapter-by-chapter appendix reveals her process and discusses what we know, what is hypothetical, and where she has speculated to smooth over the gaps in our knowledge.

Barringer Crater in Arizona. — Barringer Crater by Simon Morris, via flickr.

Now, when this book was announced, just the prospect of dipping into the story of the disaster and the ensuing recovery already had me excited. However, The Last Days of the Dinosaurs surpassed even these expectations for two main reasons.

First, there are plenty of exciting new ideas and scientific findings here. Black’s interpretation of the impact will no doubt ruffle some feathers as it is particularly catastrophic. Forget the often-depicted idea of an asteroid seen streaking across the sky, Black writes, this thing came in fast at some 45,000 miles per hour (~20 km/s). Forget, too, the often-depicted drawn-out hunger winter for the surviving dinosaurs. I had not come across this idea before, but Black writes how a global heat pulse that lasted several hours fried anyone that could not crawl underground or stay submerged underwater. This is based on estimates of the amount of material ejected by the impact that, upon re-entry, heated the atmosphere to several hundreds of degrees centigrade. It would have ignited global wildfires. Finally, the impact injected vast amounts of sulfate aerosols into the atmosphere as the impact site was rich in calcium sulfate. The ensuing acid rain “might have effectively erased some of the slowly forming fossil record” (p. 256), explaining why fossils are hard to find in the layers around the K–Pg boundary.

Fossil of dinosaur jaw full of sharp teeth. — Fossil of dinosaur jaw full of sharp teeth by Ivan Radic, via flickr.

Regarding the survivors, Black has plenty of interesting ideas too. As seen at other times and other places, there was a fern spike. A rapid initial proliferation of ferns is frequently seen in devastated ecosystems where plants have died. And why did birds survive? One novel idea is that the survival of beaked, but not toothed birds is part of the answer. “Maintaining a mouth of sharp teeth comes with a reliance on animal food. […] A consumer that feeds on other consumers has very little to survive on now. But beaked birds do not face the same constraints” (p. 117). With the extinction of toothed birds and pterosaurs, the beaked birds were poised for an evolutionary radiation. Something similar happened with the mammals. Black prominently mentions the idea that Elsa Panciroli promoted in Beasts Before Us, that “it was competition between mammals that limited the number of different forms and niches Mesozoic mammals evolved into” (p. 158). With the extinction of more archaic mammaliaformes, the placental and marsupial mammals would flourish.

The second reason the book surpassed my expectations is Black’s reflections on the process of evolution and its role in ecological recovery. This is where her prose sings in places. One thousand years post-impact “[…] there is no script for what’s about to unfold, no cast of characters that inevitably must be filled” (p. 142). One million years post-impact a reptilian resurgence seems unlikely, but “the rise of the mammals is anything but assured […] When a global disaster ends one evolutionary dance, shifting the tempo, another begins, with no certainty as to who will lead” (p. 182). She poignantly notes how the fossil record “is not in any way a complete record of life on Earth. It is a record of fortuitous burials” (p. 254). And on the process of evolution, she writes how variation and happenstance provide “the raw material for natural selection and other evolutionary forces to shunt down different pathways. Not that there is any intent to this. It’s a passive state, a constantly running routine that is merely part of existence itself” (p. 196). This is music to my ears and Black’s writing is one of the highlights of this book.

Fossil of a dinosaur hand in a museum in sand. — Fossil of a dinosaur hand in a museum by Ivan Radic, via flickr.

Writing about such an iconic event carries the risk of intense scrutiny. No doubt, some experts and other palaeo-nerds will disagree with some of the details presented here. I think her appendix is sufficiently explicit about where she speculates and where she has chosen not to hedge her bets on different explanations. I was willing to read the book in this spirit, as one possible interpretation of how things might have unfolded, though one that Black carefully backs up with scientific evidence. My quibbles are rather minor instead. One is that the book has no index, the other is that there are no notes to the appendix. Relegating the discussion of the underlying science to the appendix is a defensible choice. But not properly referencing the studies mentioned here is, to me, a minor blemish on an otherwise excellent book.

If you have any interest whatsoever in dinosaurs and their extinction, this book comes highly recommended. Her take on the topic, dipping into the extinction and recovery at various moments post-impact, is novel. I am not familiar with other books attempting this. As a bonus, I expect that many readers will come away with a better understanding of the process of evolution.

The Last Days of the Dinosaurs is available from our online bookstore.

Author interview with Richard Mabey: The Accidental Garden

In The Accidental Garden, author Richard Mabey takes the reader on a journey through his own garden in Norfolk and explores the possibility of nature becoming humankind’s equal partner. He watches as his ‘accidental’ garden becomes its own director and reorganises itself in its own way, with ants sowing cowslips in their own patterns, roses serendipitously sprouting amid gravel, moorhens nesting in trees and other fascinating interactions.

Richard Mabey has authored 30 books since becoming a full-time writer in 1974, a number of which have won awards, including the East Anglia Book Award, National Book Award and Whitbread Biography Award. He sat on the UK’s Nature Conservancy Council in the 1980s, has been awarded two Leverhulme Fellowships and three honorary doctorates, and became a Fellow in the Royal Society of Literature in 2011.

We recently had the opportunity to talk to Richard about his most recent book, where we discussed his approach to garden ‘by’ wildlife and the challenges he faced, the extent to which nature can thrive itself when human involvement is minimised, projects that are currently occupying his time and more.

Can you tell us what inspired you to write The Accidental Garden?

I’ve been meditating on many of the book’s themes for a long while – the paradox of our seeming new respect for nature co-existing with an obstinate reluctance to relinquish control; our obsession with tree-planting, as if trees have lost the ability to reproduce themselves; the lust for tidiness over vitality. What sparked the book – and set it in the theatre of our own garden – was a Dark Bush-cricket singing at midnight from the hollyhocks on that hottest-ever day in July 2022. It sounded like an anthem of hope.

Dark Bush Cricket sat on a leaf poised to jump. — Dark Bush Cricket (Pholidoptera griseoaptera) by Dean Morely, via flickr.

You mentioned in the first chapter that you try to garden ‘by’ wildlife as much as for it. Have you faced any challenges while using this approach, and what tips would you give to someone who wants to try and garden by the wildlife and biodiversity found in their own patch?

The Accidental Garden isn’t an advice manual. It’s a hesitant, personal account of what happened when we opened the gate to what I call ’parallel development’ in our space. We do what humans do in gardens, and allow other organisms to do what they want. Allow them to become subjects rather than objects, and effectively become fellow gardeners. So I left the bramble patch be, instead of digging it up to plant some runtish nursery-forced oakling. Result: Field Maple and Hazel saplings growing through its protective thorniness. I kick bare patches in the grass and see what self-seeds. Broomrapes, Heartsease and Bee Orchids have been among the surprise settlers. If you’re prepared to junk judgemental labels like weeds and pests there are very few challenges from this approach.

22:50 by Marie-Lou Wechsler, via flickr.

There seems to be evidence that, if left to fend for itself, nature can thrive and colonise without human involvement, as seen along the Dorset coast in the 1800s. What do you think humankind can learn from this going forward?

I’m continually amazed that we find nature’s ability to thrive and adapt surprising. How else could the planet have supported an abundance of life for billions of years before humans arrived on the scene? The natural world has never lost that enterprise and agility. Our reluctance to take advantage of this, to capitalise on adaptive solutions to environmental change, is a typically arrogant stance by our species, still stuck in its ‘dominion over’ mode, and our loss, as well as the natural world’s.

As you mentioned in one of your chapters, many people relish how non-native plant species can transport you to other places, while they also play a key role in garden biodiversity and over time can become at home in the UK, as seen with Snowdrops and Horse Chestnut. How do you think we can nurture the inevitable introduction of new species without this disadvantaging native plants?

The only visiting species we have any trouble with is Ground Elder, and otherwise our patch is developing into a resilient fusion garden. Native plants and animals form new communities with benign settlers. I’m writing this in May just feet from a large and dazzling patch of self-sown flowers that have established themselves in the gravel round the house, including Red Campion, Green Alkanet, Lamb’s Lettuce, Red Valerian, Hedgerow Cranesbill, Ox-eye Daisies. My interest is in the vitality and autonomy of this community (and its insect life – Hummingbird Hawk-moths are the stars!). But in terms of pure visual attractiveness it would match any herbaceous border. I’m also pleased by the way Turkey Oaks are regenerating in and beyond our patch of treeland, growing alongside the Wild Cherries and Ashes, and proving more resistant to deer browsing than English Oaks. Of course, many newcomers cause trouble away from their home ground. But in an environment that is being damaged so much by climate change, we need new species to keep a biologically rich tapestry of life here, in case our traditional species have trouble coping. ‘Nativeness’ has always had strict time limits, at both ends.

Horse Chestnut seeds on a tree. — Horse Chestnut – Aesculus hippocastanum by Judy Gallagher, via flickr.

What was the most interesting finding that you came across while undertaking this journey with your own garden?

I think learning about eliasomes, the little parcels of fat on the ends of many seeds that are ants’ rewards for acting as beasts of burden. (They ferry the seeds to their hills and feed the fat globules to their grubs.) Our red ants’ hills are now like living standing stones and I like to think they are responsible for Cowslips now carpeting most of our grassland.

What do you hope the reader can learn from The Accidental Garden?

I’ve been astonished by the inventiveness of our fellow beings when allowed a little leeway to do their own thing. When we drop our paternalistic attitude, our belief that we know best what should live where. Gardens are often compared to theatres, with the gardener as writer, director, set designer rolled into one. Can’t they also be open stages where uninvited, unsupervised species and ancient processes of colonisation and decay can improvise their own landscapes? In the 20 years we’ve been here one half of our plot has transformed itself into a kind of common, with patches of treeland and open grass, and a total of over 150 wild plant species arrived largely of their own accord. A garden is only in the smallest sense a microcosm and metaphor for the planet. But in it it’s possible to glimpse larger lessons about neighbourliness and cooperation, and the fact that the natural world is not intrinsically a victim, in need of constant intensive care.

What are you occupying your time with at the moment? Do you have any other books in progress that we can hear about?

At my age I should be put out to grass. But I can’t stop thinking and scribbling. I’ve just finished an expanded new edition of my 1993 book on the cultural history of Nightingales, Whistling in the Dark, out next year. And I’m dogged by a fancy of tracing the wild thread in the art of nature (always my second subject) from the cave paintings in Derbyshire to Andy Goldsworthy’s spring-flower-enclosing snowballs. But maybe I should just be content to use my walking stick (my Instrument of Minimum Intervention) to scratch more patches in the grass.

The Accidental Garden is available to pre-order from our bookstore.

This Week in Biodiversity News – 20th May

Climate crisis

Unusual spring weather is affecting bird migrations. The Wood Warbler, Redstart and Pied Flycatcher migrate from sub-Saharan Africa to British oak woods every spring and depend on Oak Moth caterpillars to feed their young. In recent years, these caterpillars had already emerged and were pupating by the time the birds arrived, resulting in their chicks starving. This year, however, they are facing a new issue: as spring has been so wet and cold, many birds have not reached Britain yet, while those that have are having to search for food in cool weather and have not begun nesting. These shifts in long-term weather patterns are likely to continue to cause migration issues going forward due to their unpredictability.

Pied flycatcher stood on the ground amongst small plants and grass. — Pied Flycatcher by hedera.baltica, via flickr.

The final Venezuelan glacier has been downgraded to an ‘ice field’ following large-scale glacial melt. This follows the loss of at least six other glaciers across the country in the last century due to an increase in global temperatures. In March 2024, researchers revealed that the Humboldt glacier had shrunk from 450 hectares to just two hectares. More recent observations show that, in the last two months it has reduced in size further to the area of just two football pitches. The latest projections suggest that between 20–80% of glaciers worldwide will be lost by 2100 as a result of climate change, with some of this loss already inevitable despite attempts to combat climate breakdown.

Environment

New record of Asian Hornet sightings threatens native pollination species. While Asian Hornets aren’t yet established in the UK, recent flooding and warm temperatures are increasing the risk of this species spreading across the country. Defra has warned that early detection and irradiation is the key to saving our native pollinator species who are known to feed on Honeybees. Since 2016, there have been 108 sightings of Asian Hornets, 56 of which were recorded last year alone. A further eight have been reported in the UK so far this year. Kent is on the front-line of the battle against this species with many of the UK sightings recorded in this county.

Close up photo of an Asian hornet stood on some moss on a branch. — Asian hornet by Gilles San Martin, via flickr.

Pioneering project that makes eco-friendly concrete from crushed shells may be the answer to extreme flooding. A team at the University of Central Lancashire has developed an innovative, sustainable, permeable concrete made from recycled crushed scallop and whelk shells that would otherwise go to landfill when discarded by fishmongers. Trials are being undertaken in Blackpool to assess its effectiveness in gardens, footpaths and car parks, and early results are very positive.

Over 8,000 hectares of land ‘left to nature’ to increase biodiversity. This restoration project, run by Forestry England and supported by both Forest Holidays and the Government, will be implemented in four areas across the UK: Castle Neroche, Somerset; Kielder Forest, Northumberland; Newtondale, North Yorkshire and Purbeck, Dorset. The project aims to minimise human involvement, allowing nature to shape these forest landscapes itself. Andrew Stinger, The Head of Environment at Forestry England, stated that, although the team is uncertain how these areas will evolve once human activity is reduced, they are confident they will become more biodiverse with the help of reintroduction initiatives, aid flood mitigation, improve air quality, and restore soil health.

Science

Sea Otter coming up from under the water holding a crab. — Sea Otter by Bureau of Land Management California, via flickr.

Study reveals that female Sea Otters are using tools to help preserve their teeth. Researcher Chris Law documented the moment that a female Sea Otter used a rock anvil to open the shell of its next meal, a type of behaviour which has previously been witnessed in very few animals. Further investigation revealed that, when there’s a decline in their preferred food, female Sea Otters have evolved to use tools to allow them to overcome their weaker biting ability when compared to their male counterparts, which allows them to consume alternative, larger prey without damaging their teeth.