June 2019 – Hoopoe – A blog by nhbs

Solitary Bee Week

Although we are all familiar with the important role that bumblebees and honeybees play in pollination, over 90% of the UK’s 267 bee species are in fact solitary bees. Pollinating animals are responsible for one third of the food we consume and solitary bees are particularly efficient pollinators. Unlike other bees solitary bees do not have pollen baskets and so transfer much more pollen between flowers, meaning a single red mason bee provides a pollination service equivalent to 120 worker honey bees. This makes them a critical resource in our gardens and wider countryside and one that we should all be keen to protect. We have collated some information below on how to help encourage and preserve these fascinating creatures.

Solitary Bee Ecology

Solitary bees use a wide range of nest sites including tunnels in wood or mortar, plant stems and even snail shells. They lay eggs in a series of cells and then block the entrance with materials such as mud, leaves or fine hair. The female lays an egg with a food source, made from pollen and nectar, before building a partition wall and moving on to the next cell. The bee larvae hatch, eat the food source then overwinter as a cocoon before emerging the following summer as adults.

Solitary Bee cells in the Solitary Beehive

There have been extremely worrying declines in insect numbers recorded across Europe, and solitary bees are no exception. The increased use of chemicals in farming, loss of flower meadow food sources and loss of nest sites in hedgerows and gardens are all combining to drive down numbers. The good news is that it is easy to provide food sources and nesting habitat in your garden to help solitary bees and increase pollination.

Providing Resources for Solitary Bees

Provide food sources for solitary bees by planting wild flower seeds, native trees such as hawthorn and willow, bee friendly plants such as ivy, foxgloves and lavender and allowing plants such as borage and thistles to flower in your garden. Nest sites can be provided by leaving dead wood and stems standing, creating a patch of bare earth or mud bank for mining bees and by installing wild bee houses.

With careful design consideration, bee houses can provide shelter and nesting sites for solitary bees. Bee houses can be manufactured from a variety of materials but should have a good overhanging roof to protect the nesting tubes from rain, nesting holes between 2 and 10mm in diameter and a solid back. It is better to have a number of smaller bee houses, rather than one large house to reduce the risk of parasites finding the nest. Alternatively we have a wide range of solitary bee nesting habitats available on our website.

You can tell which species of bee is using your bee house by examining the material used to plug the entrance hole. Different species also emerge at different points in the year. The most common species likely to populate bee houses are red mason bees who use mud and are active March – July, leafcutter bees who use leaves and are active May – September, and wool carder bees who use fine hairs and are active June – August. Please note that there are fewer solitary bee species in the North of England and Scotland.

Solitary Bee House Siting and Maintenance

Insect houses should be sited at least 1m off the ground, facing south or south-east, with no vegetation covering the entrance and in full sun as insects need warmth to keep moving. They should be firmly fixed so that they don’t move in the wind. If your box is likely to be occupied by red mason bees then it is helpful to ensure that there is a patch of damp mud nearby. In order to maximise the chances of adults emerging successfully from the cocoons, it is a good idea to bring bee boxes indoors into an unheated shed or garage during the winter to avoid them getting too damp. The boxes should then be taken back outside in March in time for the new adults to emerge. There is some debate as to whether brick / concrete boxes should be cleaned but they can be cleaned out with a tent peg and pipe cleaner. Boxes with cardboard tubes should have the tubes replaced regularly. Keep an eye out for failed nests and tiny holes in the mud entrance as this can indicate that the nest tube has been taken over by parasites.

Suggested Solitary Bee Houses

Bee Brick

This Bee Brick can be used in place of a standard brick or as a standalone bee house in your garden or wild patch. Available in four colours. £29.99 ~~£39.99~~

Solitary Beehive

This unique solitary beehive is made from durable FSC timber and designed specifically to attract solitary bees which are naturally attracted to holes in wood. £23.99 ~~£29.99~~

Red Mason Bee Nest Box

The nest box is supplied with 29 individual nesting tubes, two sets of screws and plugs for mounting, and full instructions. £10.99

BeePot Bee Hotel

This is a fantastic concrete planter which doubles as a nesting place for solitary bees. Available in a range of colours and sizes, this is the larger size, the mini version is also available. £42.95 ~~£49.99~~

WoodStone Insect Block

This WoodStone Insect Block is constructed from durable, FSC certified WoodStone with a nesting area created from reed stems.

£24.95

Urban Bee Nester

This urban insect hotel is part of the contemporary range of wildlife habitats that have a sleek design for city living.

£20.99 ~~£27.50~~

Suggested books on solitary bees

Solitary Bees
Paperback | July 2019| £19.99
An introduction to the natural history, ecology and conservation of solitary bees, together with an easy-to-use key to genera.

The Solitary Bees: Biology, Evolution, Conservation Hardback | September 2019| £27.99 ~~£34.99~~ The most up-to-date and authoritative resource on the biology and evolution of solitary bees.

Handbook of the Bees of the British Isles (2-Volume Set) Hardback | October 2018| £130 ~~£150~~

With photographic material of over 270 bee species, this comprehensive handbook is a once-in-a-generation identification work to the British bee fauna.

Field Guide to the Bees of Great Britain and Ireland Paperback | December 2018| £27.99 ~~£34.99~~

A comprehensive introduction to bee classification, ecology, field techniques and recording, a full glossary, and information on how to separate the sexes and distinguish bees from other insects is also included.

Buzz: The Nature and Necessity of Bees Paperback | April 2019| £9.99

Award-winning author, Thor Hanson takes us on a journey that begins 125 million years ago, when a wasp first dared to feed pollen to its young.

In order to increase awareness of how vital a role our solitary bees play in pollination, the first week of July has been designated as Solitary Bee Week. You can get involved by pledging to create nesting sites or plant food sources for bees, writing poetry or recording bee sightings.

The NHBS Harp Trap

The NHBS Harp Trap

Earlier this year we were delighted to launch another exciting product manufactured here at our base in Devon. After a concerted period of design and manufacturing effort by our expert Workshop Team, followed by testing and review by ecological professionals, our NHBS Harp Trap was ready for production. The launch of our product into the wildlife equipment market signals the arrival of the only commercially produced harp trap in Europe.

What is a Harp Trap?

A harp trap provides an alternative bat survey method to mist netting or the use of bat detectors. They are particularly useful in situations where bats in flight can be channeled through a natural funnel such as above a water course, a cave or mine entrance or a clear area within a forest.

Harp traps consist of a frame which is either freestanding or suspended, and supports two to four rows of nylon strings. The bats will fly into the nylon strands and then fall unharmed down into a collecting bag below. The catch bag is made from green cotton canvas that is water resistant and breathable and includes heavy duty clear plastic baffles to prevent the bats from escaping. Unlike mist nets, harp traps do not entangle the bats an it has been reported that they can be more effective for surveying bats, potentially capturing higher numbers of individuals.

The NHBS Harp Trap

The new NHBS Harp Trap is a three-bank trap, meaning it has three rows of nylon line. Our trap has a catch area of approximately 4m₂and catch bag which is around 60cm deep. It folds down neatly into a bespoke carry bag and weighs approximately 15kg-full specifications and dimensions are below. The trap takes two people around 10 minutes to assemble and stands on four sturdy, extendable legs and which can be arranged at the height that you need the trap to be. There is also the option to anchor the harp trap with guy ropes in windy conditions. The trap can also be adapted to be suspended if this is required.

Our trap has a few innovative features designed to make assembly and disassembly easier. Firstly the strings are wrapped around a winding mechanism which greatly reduces the stress and time-consuming act of sorting through tangled lines in the dark.

There is also an extension under the catch bag, which prevents the bats from flying underneath the trap and this doubles as protection for the component parts as it wraps around the disassembled trap when it is stored in its bag.

Dimensions:

Catch area: 4m2 approximately
Catch area L x W: 180 x 225cm
Length: 180cm
Catch bag depth: 60cm
Catch bag width: 44cm
Weight: 15kg

Folded dimensions (in carry bag)
Height: 46cm
Length: 200cm
Width: 22cm

Operational dimensions
With legs fully retracted:
Height 314cm
Width (at base): 62cm
Length (at base): 230cm
With legs fully extended:
Height: 372cm
Width (at base): 100cm
Length (at base): 252cm

Testing

As our harp trap evolved, prototypes were trialed and reviewed by ecology professionals; Professor Fiona Mathews of Sussex University and Neil Middleton of Batability. Their expertise and excellent feedback helped us develop our the harp trap to the point that it was now ready to go live.

The team at NHBS have done an excellent job in coming up with a new and refreshing approach to harp trapping, which shows many innovative and useful design features. When testing the equipment we were able to demonstrate that it was quicker/easier to assemble than competitor’s products. We are happy to recommend this harp trap, and will be ordering one ourselves, to be used during our training courses and for bat-related research.
Neil Middleton, BatAbility Courses & Tuition

The Law

Harp traps can only be sold to those who are licensed to use them. If you hold such a licence, we will ask to see a copy of your NE, NRW or SNH licence when you contact us about your purchase. If you are purchasing from overseas, we will request details about your institution and research.

NHBS Manufacturing

NHBS manufactures marine, freshwater and terrestrial survey tools, all carefully designed to meet the demands of researchers, consultants, public authorities and educators in the environment sector. Made by our team of expert engineers, fabricators and seamstresses, our products have become renowned for their quality, durability and affordability.

Find out more about our manufacturing.

Key accessories for using alongside your harp trap

The Petzl Tikka Headtorch is a high-power and easy to use headtorch that can produce a light beam with a brightness of up to 300 lumens. It is available in four colours and can be powered with either three AAA batteries (included) or using the Petzl CORE rechargeable lithium-ion battery.

The Kite LED Loupe Triplet Hand Lens 10 x 21 provides crystal clear images which are enhanced with its ring of LED lights. This product may prove invaluable when trying to identify some of the tiny distinguishing features of certain bat species.

The A4 Portrait Waterproof Clipboard allows you to write in the field without having to worry about the rain. A waterproof plastic covering system helps to keep your paper dry and can be closed over the clipboard with the strong velcro fastener.

Books

The Bats of Britain and Europe

Paperback | Sept 2018

The Bat Workers’ Manual

Paperback | July 2012

Field Guide to Bats of the Amazon

Paperback | Feb 2018

The NHBS Guide to Hand Lenses

The possession of a hand lens is one of the defining characteristics of a naturalist.

We use them for everything from peering at beetle genitalia and examining floral characters, to examining the arrangement of teeth in small mammal jaw bones. There are a wide variety of hand lenses on the market so how do you decide which lens is best for you? This article contains all the information you need to make an informed choice.

Glass versus plastic lens?

The optic in a hand lens can be made from glass or plastic. Serious naturalists and professionals will always choose a glass lens. Plastic lenses are generally more affordable and lighter but are of lower optical quality and are more difficult to clean. Plastic hand lenses and magnifiers, however, can be a good choice for schools and young children, for these users have a look at the Hand Held Magnifier.

How many optical elements?

An element is an individual piece of glass within a lens. When you look through a high quality camera lens you will typically be viewing what’s in front of the lens through four to six lens elements, as well as other elements used for focusing and zooming (see image below right).

Hand lenses are constructed with one (singlet), two (doublet) or three (triplet) lens elements. Each one is specially shaped to correct for a particular type of optical distortion, so the more elements, the higher quality the image.

The highest quality lenses that we offer are the triplet products made by Kite and Belomo. These offer a bright, crystal clear and undistorted view of your subject. The images afforded by these optics will impress the user whatever their field of work is, be it geology, entomology or botany.

N.B. There is a brand of hand lens / loupe called “Triplet”. Please note that despite the brand name this popular product has one lens (singlet).

If you are interested in obtaining a doublet hand lens you should consider those that are manufactured by Opticron and also Kite. Opticron will be a familiar name if you have ever researched the purchase of a pair of binoculars and their hand lenses provide excellent distortion free magnification at 6x, 10x and 15x.

Magnification

A 10x magnification hand lens will be more than adequate for most purposes. Higher magnification lenses tend to be harder to use but are very useful for viewing extremely small objects. If you are unsure of which magnification you need, or think you may need several different lenses, you might consider the Triple Hand Lens (x3, x4 and x5).

Lens diameter

Large diameter lenses provide a wider field of view which means that they are easier to use but they are slightly more expensive to produce.

How hand lenses are named

Hand lenses are named in the same way as binoculars, with both the lens diameter and the magnification included in the name. For example, the Opticron Hand Lens, 23mm, 10x Magnification has a 23mm diameter lens and provides 10x magnification.

LED Option

Some hand lenses such as the LED Triplet Loupe Hand Lens 10x 21mm possess LED lighting in order to illuminate the object that you are viewing. This option can greatly improve your viewing experience and can be particularly valuable in low light conditions. Bat workers have expressed how useful these can be when looking for the key identifying features of a specimen held in the hand. Using a lens with LED can reduce stress on the bat because it means that you do not have to point the beam of your head torch directly at the animal.

Using your hand lens

Finally, a quick note on hand lens technique. To use your hand lens correctly, hold the lens close to your eye and then either a) move the subject closer to your eye until it comes in to focus or b) move your head (and the hand lens) closer to the subject until it comes into focus. The magnification of your lens will affect your positioning, as the higher the magnification, the smaller the focal length (the distance between the lens and the object) will be.

Getting the light right is also an important part of using your hand lens. You need a good source of light. Ideally, bright daylight but other bright light sources such as ceiling lights are sufficient. The light should be between your lens and the object, pointed at the object and not the magnifier. Any reflection on the lens can obscure the focus. This may require a little experimenting with your positioning until you get it right. It’s easy with a little practice so don’t get put off if you find a new hand lens difficult at first. Expect to get close up to what you’re examining – it’s quite common to see naturalists crawling around on the ground to get close to a plant they’re identifying.

Keeping your hand lens safe

It can be very hard to find a much-loved hand lens dropped in long grass or woodland. To prevent this happening, we recommend a lanyard for your hand lens – if you have it round your neck you won’t drop it!

For storage and transport purposes most hand lenses come equipped with either a storage pouch or a plastic case. These enable you to keep your optic safe and reduce the risk of scratches or knocks occurring, especially when it is being carried in a pocket or bag. Spare leather pouches are available for the Triplet Loupe 10x 21mm but these may fit other lenses as well – we are happy to check before you buy.

Our full range of lenses and magnifiers can be found at nhbs.com.

Author interview: Simon Barnes

When writer Simon Barnes heard a Cetti’s Warbler sing out at a house viewing, he knew immediately that he had found his new home. Their new garden backed onto an area of marshy land which he and his wife purchased and began to manage it as a conservation area, working with the Wildlife Trust to ensure it became as appealing as possible to all species.

On the Marsh is his account of a year spent surrounded by wildlife. Part memoir, part nature guide, this is a vivid and beautifully written account of the wonders that can sometimes be found on our doorsteps, and how nature can transform us all.

We asked Simon a few questions about the inspiration behind writing his new book and his hopes and ambitions for the wildlife of Britain.

1. Can you tell us a little about your background and how you got interested in the natural world?

I received David Attenborough’s Zoo Quest for a Dragon as a junior school prize, the Natural History Museum every Saturday and the trees of Streatham Common to climb. After education and four years on local papers I ran away to Asia, when I worked as a gonzo journalist and re-found my taste for wildness.

I returned home and started writing about sport and wildlife, with columns in The Times on both subjects; I was chief sports writer for 12 years. I have written a number of books on wildlife, including the Bad Birdwatcher trilogy.

2. What was your inspiration to write a more auto-biographical work than your previous books?

I suppose it was the marsh itself. I wanted to write, not just about the few acres of Norfolk marshland we are lucky enough to own, but also about living with the place: sharing it: being a part of it.

I started writing with that idea in mind: and at once, my younger son Eddie made an entrance. I hadn’t really planned that, but he and I spend a lot of time out there, so it had to happen, I suppose. He’s just turned 18 and has Down’s syndrome. I started off wanting to write about vulnerable places: I ended up writing about vulnerable people as well.

3. Do you believe intervention in the form of land management is important to keep places like the marsh just as they are?

In land-management, doing nothing is a powerful form of action. Mostly I have left the marsh do what it wanted, but I have made sure the dikes are kept cleared and some trees have been cut down. I now manage an adjoining few acres rented from the parish: I am trying to keep this place open with the help of a local grazier. Nice contrast.

What’s natural? What’s unnatural? What’s imposed? Sterile questions: what matters is life.

4. The Barn Owl is often described in your book; would you say that it was the totem species on the marsh, or would you give that accolade to something else?

I am slightly surprised by this question, because so far as I am concerned, the marsh harriers steal the show. Marsh harriers: extinct as breeding birds in this country in the 19th century, making a comeback after WW1, then reduced in 1971 to a single pair – and now they skydance and hunt and food-pass over our bit of marsh: the powered flight just above stalling speed, the long glide with the wings held in that dihedral, and above all, the sense of ownership… because the marsh harriers own the marsh. I have the immense privilege of looking on.

5. While observing the marsh, was there one surprising fact or discovery that you didn’t previously know that you’d like to tell us about?

I was given a moth-trap for my birthday. I am pretty ignorant about moths, but on the first day I used it, the first moth I found was the moth on the cover of my moth ID book: an Elephant hawk moth, big enough to count as an honorary bird. So I read it up: and apparently it’s common. Well, maybe so: not commonly seen. It was a classic through-the-wardrobe moment.

6. What are your hopes for the future of such special and bio-diverse places?

My hope for the future is that they have one. I have long given up optimism, because I’m not daft, but pessimism is no way to live. Will we win the battle? Or will we lose? Such questions no longer matter. What matters is fighting on the right side.

7. Do you have any new projects in the pipeline that you’d like to tell us about?

I’m working on a big fat book called A History of the World in 100 Animals. It’s about the interface between human and non-human species: starting with Lion (we humans were originally a prey species), moving on to domestic cat (did we take them into our home because they purr?) and then to Gorilla (did you know there were just 46 years between King Kong terrorising New York and David Attenborough romping with Gorillas in Rwanda? That’s revisionism for you…). After that, Galapagos Mockingbird, American Bison, Oriental Rat Flea… you get the idea.

On the Marsh: A Year Surrounded by Wildness and Wet
Hardback | June 2019| £13.99 ~~£16.99~~

How the rewilding of eight acres of Norfolk marshland inspired a family and brought nature even closer to home.

All prices correct at the time of publication.

Dino-Lite Offer – free carry case with selected models

Until 31st July, receive a free sturdy carry case worth £29.99 with the AM7915MZT Dino-Lite Edge or Dino-Lite WF4915ZT Wireless, both with extended depth of field.

AM7915MZT Dino-Lite Edge USB Digital Microscope £1056

with USB connection, extended depth of field, auto magnification read and flexible LED control

Dino-Lite WF4915ZT Wireless Digital Microscope £1065

WiFi or USB connection, extended depth of field, auto magnification read and flexible LED control

See all benefits of extended depth of field here

Offer also applies to the extended working distance versions of these models: WF4915ZTL or AM7915MZTL.

See all Dino-Lite products

Author Interview – Stephen Rutt

In this moving and lyrical account, Stephen Rutt travels to the farthest corners of the UK to explore the part seabirds have played in our story and what they continue to mean to Britain today. From Storm Petrels on Mousa to gulls in Newcastle and gannets in Orkney, The Seafarers takes readers into breath-taking landscapes, sights, smells and sounds, bringing these vibrant birds and their habitats to life.

To get to know Stephen Rutt and his new book, we asked him a few questions on his inspiration, advice and some interesting facts he’s discovered on his journey while writing The Seafarers.

Can you tell us a little about your background and how you got interested in seabirds?

I’ve been birding since I was 14. I grew up with two dominant interests: birds and books. Circumstances funnelled me towards studying literature and after university I was unhappily living in London with a job I didn’t enjoy. When I was 22 I saw an opportunity to get out, by volunteering at the bird observatory on North Ronaldsay, the northernmost of the Orkney islands. I was expecting to fall in love with migratory birds, but found myself in one of the slowest, least-exciting springs for them. That focused my attention instead on the unfamiliar terns, the tysties (black guillemots) and fulmars. I fell in love with seabirds there. The Seafarers is my love letter to them.

2. If anyone wanted to observe or study seabirds themselves, what would be your advice to getting started.

Britain is brilliant for seabirds. Even if you can’t get to the coastline, there are kittiwakes – a proper sea-going gull – nesting in Newcastle city centre, and terns migrating overland. If you can get to the coast then there will be a colony of something not too far away, whether it is terns or fulmars or gannets or auks. Find a place and a species that suits you and spend some time watching – it’s a heady, hypnotic, fun thing to do. Some books will help. The Collins Bird Guide is a great field guide to help you work out what you’re looking at, particularly with the tricky common/Arctic tern, and a book like Shearwaters by R. M. Lockley will guide you through the thought processes and the joy of observation. If anyone reads The Seafarers and is inspired to go birding or seek out a seabird, I will consider it a success.

3. Seabirds face many threats to their survival; in your opinion, what is the number one threat they face?

Climate change. Plastic pollution is an obvious and alarming threat, but I fear it is easy to be distracted by a problem that’s much more visible, emotionally involving, and straightforward for individuals to have an effect on. Global warming threatens everything: not just the birds but the eco-systems they live in. It is not an original thing to say, but it is the number one threat with which we live. Problems are amplified by apathy. I wrote the book to bring the sight, the sound, and the smell of the species and landscape to the reader. I want people to fall in love with seabirds like I did.

4. Each chapter tends to focus on a different seabird; are you able to say which bird had the most profound effect on you?

Fulmars. I had been travelling the best part of 24 hours by public transport (two trains, four buses), when I finally got the ferry across to St Margaret’s Hope on the Orkney archipelago. It was blowing a gale and I was worried about the flight to North Ronaldsay being cancelled, stranding me in an unfamiliar place. I stood on the deck anyway, clinging to the handrail, fulmars carving up the breeze, turning it into their plaything. Their ability at flying elegantly in the strongest winds is exceptional. The wind continued for my first few days on North Ronaldsay. Fulmars were everywhere. At times they were close enough that it felt like I could reach out and touch them (though obviously I didn’t!). That was glorious. They were my welcome committee and they made the transition feel like absolutely the right thing to do.

5. While writing your book and observing seabirds; was there one surprising fact or discovery that you didn’t know previously that you’d like to tell us about?

I learned so much while researching the book, both how astonishing seabirds are and the distressing effects we are having on them. But let’s be optimistic! One of my favourite discoveries was in relation to the Arctic tern that were GPS tagged on Northumberland’s Farne Islands. It took the birds just a month to migrate to the sea off the coast of South Africa’s Cape of Good Hope. It took them just a month to return from there in spring, as well. The speed and the distance they are capable of is just incredible.

6. What are your hopes for the future of seabirds?

That they have one – which is depressing but true. Beyond that, I hope that we can take their conservation seriously, and that they can thrive as we continue into the Anthropocene, and a future of plastic pollution and global warming.

7. Do you have any new projects in the pipeline that you’d like to tell us about?

I do! I have just finished my second book. It’s about geese, winter, and the twin pull of Scotland and East Anglia and should be published this autumn by Elliott & Thompson. In the meantime, I’m looking forward to going birding again.

The Searfarers: A Journey Among Birds
Hardback | May 2019| £14.99
Takes readers into breath-taking landscapes, sights, smells and sounds, bringing these vibrant birds and their habitats to life.

You can discover more about the lives of seabirds, shorebirds and wildfowl by browsing our complete selection.