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 optical lens in a hand lens can be made from glass or plastic. Plastic lenses are generally more affordable and lighter but are of lower optical quality and are more difficult to clean. Plastic hand lenses, however, can be a good choice for schools and young children.

How many optical elements?

Canon 400mm

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).

Paul Canon EF 400mm f/4 DO IS USM By Paul Chin

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.

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 Duel Singlet Loupe (x10 and x20) or 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 leOpticron Hand lens, 23mm, 10x magnificationnses 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.

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. 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 – this has two functions: a) if you have it round your neck you won’t drop it, and b) if you put it down somewhere the bright blue lanyard is easy to spot.

The table below provides a guide to the hand lenses sold by NHBS. More information and specifications of each can be found by following the links. Our full range of lenses and magnifiers can be found at nhbs.com.

 

Big Butterfly Count 2017

The peacock butterfly, with its striking eyes on the hindwings, is a common visitor to British gardens. Inachis Io by Maja Dumat is licensed under CC BY 2.0.

The 2017 Big Butterfly Count, organised by Butterfly Conservation, runs from 14th July to 6th August.

This nationwide survey, launched in 2010 and conducted annually, is the world’s largest survey of butterflies; in 2016 over 36,000 people took part! The survey aims to investigate trends in butterfly and moth species and will help guide conservation efforts within the UK.

Taking part is easy – simply set a timer for 15 minutes and then count the butterflies you see during this time. Counts are best undertaken on a dry, sunny day and good places to conduct the survey are in your garden or in a local park or woodland.

If you are counting from one place, count the maximum number of each species that you can see at a single time. (This ensures that you don’t count the same butterfly more than once). If you are doing your count while walking, then simply total up the number of each species that you see during the 15 minutes. The final step is to submit your results online or via the iOS or Android app.

For lots more information, head over to the Big Butterfly Count website where you can download an identification sheet, submit your sightings and view the 2017 results map. Check out the video below for an great introduction from Nick Baker.

NHBS stocks a full range of butterfly survey equipment, including nets, binoculars, collecting pots and field guides. Need some advice? Contact our customer services team on +44 (0)1803 865913 or email customer.services@nhbs.com

 

 

The NHBS Guide to Whale and Dolphin Watching

Public sighting records are important for UK cetacean conservation. Atlantic Bottlenose Dolphins by Jo Garbutt is licenced under CC BY 2.0

Catching a glimpse of a whale or dolphin whilst visiting the coast is a uniquely memorable experience and a few hours spent whale and dolphin watching is fun for all age groups. Plus, your sightings can really make a difference and will add to the growing body of survey data collected for the UK coastline.

Keep reading for some tips on when and where to watch whales and dolphins, how to get started and where to report your sightings.

When and where should I watch cetaceans and what am I likely to see?

The best time for spotting cetaceans is between April and October when visitors to our coastal waters are at their highest. Some areas are undoubtedly better than others for catching a glimpse of these elusive animals: Devon, Cornwall and Cardigan Bay in Wales are good places to go, as well as the coasts of northern Scotland.

Twenty-nine species of cetacean have been recorded in UK waters, and some areas of our coastline are home to permanent populations of dolphins. The most commonly reported species are bottlenose dolphins, harbour porpoises and minke whales, although rarer visitors have included killer whales, humpback whales and striped dolphins.

Of course, cetaceans aren’t the only things you will see. Keep your eyes peeled for seals too and enjoy the seabirds and beautiful views at the same time!

How do I get started watching whales and dolphins?

For most people, watching cetaceans from the land (rather than from a boat) will be the most convenient and economical option. Any place where you can sit comfortably with a good view of the sea will suffice, but if you can make your way to a cliff top then this will provide a better vantage point. Calm, overcast days tend to be the best for spotting cetaceans as the combination of swell, choppy waves and surface reflections can make fins all but impossible to see. For the same reason, the hours following dusk and prior to dawn are the best times of day to go.

A watch is conducted by scanning the surface of the water with the naked eye, switching to binoculars periodically or whenever you notice a disturbance at the surface. As soon as you see something that may be a whale or dolphin, concentrate your binoculars in that area, making sure to scan a little way around in case it surfaces again nearby. Another good technique is to look out for seabirds circling or diving as this may indicate cetaceans feeding just below the surface.

Any binoculars (or a scope and tripod) can be used for sea watches. If you are looking for binoculars specifically for this activity, however, make sure to go with a model that has a large objective lens diameter as this will improve the light transmission and will help with viewing in lower light conditions.

For researchers studying marine mammals, items such as thermal imaging scopes and hydrophones are useful additions to the surveying toolbox and will allow them to find and identify cetaceans in a greater range of conditions as well as enabling more detailed investigation of behaviour.

Where do I submit my sightings?

Several organisations in the UK offer online sighting forms where you can submit information about whales, dolphins and porpoises that you have confidently identified during your watch. Take a look at the Sea Watch Foundation, the Whale and Dolphin Conservation, or the Cetacean Research & Rescue Unit websites for sighting forms. Other regional groups such as the Hebridean Whale and Dolphin Trust and Norfolk Cetaceans also collect local sightings so it might be worth finding out if there is an active recording group near to where you live.

Check out the NHBS website for a great range of binoculars and scopes, as well as other handy field kit such as waterproof clipboards and notebooks. Also have a look at these two field guides to help with identifying whales and dolphins.

Guide to the UK Cetaceans and Seals
Guide to the UK Cetaceans and Seals
Whales, Dolphins and Seals: A Field Guide to the Marine Mammals of the World
Whales, Dolphins and Seals: A Field Guide to the Marine Mammals of the World

 

The Importance of Nest Sites for Birds and Bees

Changes in land use can result in strong competition between species that have historically survived alongside eachother, such as goldfinches and chaffinches. Goldfinch by Tony Smith is licenced under CC BY 2.0.

Over the last century, land use in the UK has changed drastically. Small mixed-crop farms, traditionally separated by lanes, hedgerows and wild meadows have been replaced with larger, more specialised facilities. At the same time, the density of grazing animals such as sheep and cattle has also risen substantially. This combination of land-use change and agricultural intensification has contributed significantly to habitat degradation and biodiversity loss, and has led to huge, often dire, changes for the wildlife that call these places home.

Understanding these processes is of huge importance to conservationists, and a considerable amount of research has been conducted into the broad scale effects of land use changes on biodiversity. It is less well understood, however, why seemingly similar species can be affected to a different extent by local changes in their habitat.

A recent study, conducted by Dr Andrew Higginson at the University of Exeter, suggests that competition for nesting space may be a key factor in the differences observed. His study used a mathematical model to predict the likely outcome when populations of birds and bees are faced with a reduction in suitable nesting sites. Results indicated that larger, earlier-nesting species tend to fare better in these conditions, but at the expense of smaller, later-nesting species who, in the real world, would either fail to find a nesting site or be forced into using a poor quality or risky location.

Dr Higginson’s results illustrate that, whilst two or more similar species can co-exist together very happily when there are sufficient nesting spaces available, as soon as these become limited, competition and conflict become inevitable. In severe situations, species that have historically thrived in the same environment may suddenly find themselves battling for survival.

A key message from the study was that conservation efforts should ensure that priority is given to the creation and maintenance of suitable nesting sites. Conservation practices often focus on provision of food for wildlife, such as planting wildflowers for bees and providing food for our garden birds. Preserving and creating safe and accessible places for these animals to nest, however, is just as critical if we are to ensure their continued survival.

Head over to www.nhbs.com for our full range of bird nest boxes and insect nesting aids, or download our full nest box price list.

 

Kaleidoscope 4.3.0 Bioacoustic Software Now Available

The newest version of Kaleidoscope, version 4.3.0, is now available to download from the Wildlife Acoustics website.

See below for details about the new features included in this release, as well as a handy table to see which version of Kaleidoscope is right for you, and some useful tutorial videos.

New features include:

New Bat Auto-ID Classifiers
New bat classifiers for North America, Neotropics, Europe and South Africa as well as updated common names for some species. The default setting for classifiers is now “Balanced” which is a useful compromise between the more sensitive and more accurate options.

New time-saving workflow features
New features in the results viewer window include:
• When opening a saved results spreadsheet, a file browser allows you to easily locate the folder containing the corresponding input files
• Bulk ID multiple selected rows
• Bulk copy files in selected rows to a specified folder

Full support for GUANO metadata (Kaleidoscope Pro only)
Kaleidoscope now reads and write GUANO information alongside Wildlife Acoustics metadata (WAMD).  This will been shown in the file at the end of the metadata notes window.

Bug fixes
Several bugs have also been fixed in the new release, details of which can be found in the Kaleidoscope documentation.

Which version of Kaleidoscope is right for me?

Kaleidscope Tutorial Videos


Kaleidoscope UK, Kaleidoscope Neotropics and Kaleidoscope Pro are all available to purchase from NHBS.

 

Book Review – Turtles as Hopeful Monsters

Turtles as Hopeful MonstersTurtles as Hopeful Monsters: Origins and Evolution

Written by Olivier Rieppel

Published in hardback by Indiana University Press in March 2017 in the Life of the Past series

Turtles have long vexed evolutionary biologists. In Turtles as Hopeful Monsters, Olivier Rieppel interweaves vignettes of his personal career with an overview of turtle shell evolution, and, foremost, an intellectual history of the discipline of evolutionary biology.

An initial, light chapter serves to both introduce the reader to important experts on reptile evolution during the last few centuries, as well as give an account of how the author got to study turtles himself. After this, the reading gets serious though, and I admit that I got a bit bogged down in the second chapter, which discusses the different historical schools of thought on where turtles are to be placed on the evolutionary tree. An important character here is skull morphology and a lot of terminology is used. Although it is introduced and explained, it makes for dense reading.

I think the book shines in the subsequent chapters that give a tour of the evolution of, well, evolutionary thinking.

When Darwin formulated his theories, he argued that evolution is a slow and step-wise process, with natural selection acting on random variation to bring about gradual change. This is the transformationist paradigm. Turtles as Hopeful Monsters, page 53The fossil record has yielded some remarkable examples where a slow transformation has occurred over time, such as the development of hooves in horses. But equally, there are many examples where no such continuous chain exists in the fossil record. Turtles are one such example, as they just suddenly appear in the fossil record, shell and all. Darwin himself attributed this to ‘the extreme imperfection of the fossil record‘. This lack of transitional fossils has of course been eagerly exploited by the creationist / intelligent design movement for their own ends.

But ever since Darwin, biologists have argued, and still do, that there exist mechanisms that allow for rapid innovation and saltatory evolution (i.e. evolution by leaps and bounds). This is the emergentist paradigm. Rieppel gives an overview of the different theories that have been put forward over the last two centuries, which is both illuminating and amusing. This covers such luminaries as Richard Goldschmidt (who coined the phrase “hopeful monsters”), Stephen Jay Gould (who revived it), and Günter Wagner (who provides the best current explanation according to Rieppel).

Just a little bit more about this phrase “hopeful monsters”, as this is such a prominent part of the book’s title. According to Goldschmidt, major new lineages would come about through mutations during early development of the embryo. This, of course, has the risk of producing monsters when the organism matures, likely resulting in premature death. So, Goldschmidt proposed a theory of hopeful monsters, where such drastic changes would successfully result in new evolutionary lineages with new body plans. His explanations, which required evolution to be goal-directed and cyclical (so-called orthogenetic evolution) have become obsolete, but he wasn’t entirely off the mark either. The best current explanations, according to Rieppel, comes from Wagner (author of Homology, Genes, and Evolution) and others who suggest radical changes to body plans do originate at the embryonic stage, and that the cause is the rewiring of the underlying genetic mechanisms.

Turtles as Hopeful Monsters, page 181The final two chapters of the book show how the debate over turtle shell evolution has gone back and forth between these two paradigms over time. Here again, Rieppel goes quite deep into morphology, this time of the shell, with accompanying terminology. Although the consensus seems to be leaning towards changes in embryonic development being responsible for the sudden appearance of the turtle shell in the fossil record, the final chapter deals with recent fossil finds from southwestern China that have revealed a potential missing link: a turtle with a fully developed belly shield.

Overall then, this book is a highly enjoyable romp through the intellectual history of evolutionary biology, using turtle evolution as its red thread. I could have used a bit more hand-holding here and there, and I feel the book would have benefited from an (illustrated) glossary or some extra illustrations. The reading gets quite technical when Rieppel goes into expositions on skull and shell morphology. That said, this book is an excellent addition to the popular science works in the Life of the Past series.

Turtles as Hopeful Monsters is available to order from NHBS.

The NHBS Guide to Small Mammal Trapping

Field vole (Microtus agrestis)

Small mammals form a vital component of our terrestrial ecosystems, both by contributing to overall biodiversity and providing prey for carnivores such as owls, pine martens and weasels. Survey data for many of our small mammal species is insufficient for them to be assessed as part of the UK BAP process and so supporting our national monitoring programme is incredibly important.

One of the most common ways of monitoring small mammals is through the use of live traps. These allow a range of species to be monitored simultaneously, and also allow biometric data such as weight and sex to be collected. In addition, estimates of population size and structure can be calculated using capture-mark-recapture (CMR) techniques. The use of live traps is also a great way for getting volunteers involved and providing them with an up-close experience of the animals they are passionate about.

Live-catch techniques, however, do have a few disadvantages in that populations can be affected by disturbance or mortality. Live-trapping is also unsuitable in certain areas (such as urban or busy rural regions) and requires a relatively large amount of time and expenditure.

Here we will take a look at some of the most commonly available live-traps used for small mammal survey.

Longworth Trap

Longworth Small Mammal Trap

The Longworth trap is made from aluminium which makes it lightweight for field use. This trap has been widely used in the UK for many years.

The trap consists of two parts: a tunnel which contains the door tripping mechanism, and a nest box, which is attached to the back of the tunnel. The nest box provides a large space for food and bedding material to ensure that the trapped animal is comfortable until release.

Advantages
• Widely used for many years; well documented in scientific literature
• Lightweight and durable
• Sensitivity of the trip mechanism can be adjusted
• Door can be locked open for pre-baiting

Disadvantages:
• Expensive
• Replacement parts not available
• Larger species can occasionally trip the trap without being caught
• Pygmy shrews may be too light to trigger the trap mechanism

Sherman Trap

Sherman Trap

Sherman traps work by use of a triggered platform which causes the door to shut when the animal enters. It folds down to a size and shape which is easy to transport.

Sherman traps are available in a range of different sizes to suit the species that you are hoping to catch. They can be purchased in aluminium or as a galvanised version which is more resistant to rusting.

Advantages:
• Lightweight and foldable – easy to transport and store
• Different sizes available, including long versions
• Easy to clean

Disadvantages:
• Difficult to add bedding/food as this interferes with the trap mechanism
• Traps may distort over time with repeated folding
• Danger of long tails being trapped in the door

BioEcoSS TubeTrap

The TubeTrap is a relatively new addition to the mammal trapping range and features an innovative design. It provides a safe method of trapping even the smallest mammals such as shrews.

The robust plastic construction has self-lubricating and fully replaceable parts. It can be purchased either with or without a shrew hole in the door. Spare doors are also available which means that you can convert the trap between shrew and non-shrew versions quickly and easily.

Advantages:
• All parts are easily user-replaceable
• Door can be locked open for pre-baiting
• Trigger sensitivity is easily adjustable; suitable for pygmy shrews
• Green colour of trap makes it inconspicuous in the field

Disadvantages:
• Door is a little fiddly to set – particularly for larger fingers
• Relatively new design means it has been tested fewer times in the field in comparison to Longworth or Sherman Traps

Economy Mammal Trip-Trap

Economy Mammal Trip-Trap

The Economy Trip-Trap provides a cheaper alternative to other mammal traps.  It has a traditional treadle design which closes the door behind the animal when it enters the trap.

This lightweight trap is suitable for short-term or occasional use and is also popular for trapping mice indoors either for surveying or for relocation.

Advantages:
• Cheap and lightweight
• Transparent for easy inspection
• Good for indoor use

Disadvantages:
• Doesn’t work well in wet/humid conditions
• Can’t pre-bait or change trigger sensitivity
• Trapped animals may chew through the trap

Pitfall Traps

P2.5 litre Plastic Bucketitfall Traps consist of a container which is sunk into the ground, into which small mammals can be caught. Traps can be baited if required and drift fencing can also be used to direct animals into the trap.

Small cans or buckets make ideal pitfall traps. If using buckets, lids can be fitted when not in use, which means that traps can remain in situ for extended periods of time.

Advantages:
• Able to catch multiple individuals
• Low maintenance

Disadvantages:
• More labour intensive than box traps to set up
• Trapped animals may attack eachother or be eaten by predators
• May become waterlogged in damp areas or in bad weather

Other survey methods

Other methods of surveying for small mammals include the analysis of owl pellets for mammal remains and the use of dormouse nest tubes. Hair and footprint tubes are also useful as well as searching for field signs such as tracks and faeces.

A comprehensive monitoring programme will most likely involve a combination of these methods, depending on the availability of participants and volunteers and the type of habitat present locally.

If you are interested in becoming involved in mammal survey in the UK, take a look at the Mammal Society website where you will find information on local recording groups, training opportunities and the latest mammal-related research.

Our full range of mammal traps can be found on our website.

 

Book Review – How to Tame a Fox (and Build a Dog)

How to Tame a Fox (and Build a Dog)How to Tame a Fox (and Build a Dog): Visionary Scientists and a Siberian Tale of Jump-Started Evolution

Written by Lee Alan Dugatkin & Lyudmila Trut

Published in March 2017 by Chicago University Press

How to Tame a Fox (and Build a Dog) tells a remarkable story about a remarkable long-term experiment you will most likely never have heard of. I hadn’t, despite my background in evolutionary biology. When the announcement for it crossed my desk a month or so ago, its subtitle immediately grabbed my attention.

For more than 60 years, Russian scientists have been cross-breeding captive foxes in Siberia, selecting for tameness, in a bid to learn more about the evolutionary history of animal domestication. Written by evolutionary biologist and science historian Lee Alan Dugatkin and Lyudmila Trut, who has been part of this experiment for close to six decades, it tells the story from its inception.

Back in 1952, geneticist Dmitri Belyaev had many questions regarding domestication. Though the breeding techniques were well understood, how did domestication start? The wild ancestors of today’s domestic animals would have likely run away or attacked humans, so what changed to make domestication possible? Being the lead scientist at a state laboratory that helped fur breeders produce more beautiful and luxurious fox pelts, he had both the knowledge and the means to tackle these questions. His plan? Experimentally mimic the evolution of the wolf into the dog using its close genetic cousin the fox. It was bold, both in its timescale, likely needing years – even decades – to yield results, but also in its timing. You see, Russia was still under the communist rule of Stalin, and one of his protegees, the poorly educated agronomist Trofim Lysenko, was waging a war on the “western” science of genetics. Scientists were expelled, imprisoned, and even murdered over their career choice. But Belyaev, having lost a brother this way, refused to back down. Far from Lysenko’s prying eyes in Moscow, in the frozen wilderness of Siberia, he started his breeding experiments, purporting to improve breeding rates in case anyone did come asking. Lyudmila joined him in 1958, and this book is their story.

It’s a story of science, and the authors do a good job distilling the findings into a reader-friendly format. The results are fascinating as the foxes rapidly evolve from wild animals to tamer and tamer companions that crave human interaction, undergoing a raft of subtle morphological changes in the process. But it’s also very much a human story. Of the women, often local peasants, who came to work at the fox farm, not necessarily understanding the science, but showing immense dedication to the cause. Of the researchers, who developed a deep love for, and connection with the generations of foxes, who rapidly became more dog-like in their behaviour and appearances.

It’s a story of persistence against all odds; the experiments are running to this day and have survived Stalin’s brutal regime, the Cold War, and the dissolution of the Soviet Union, with all the economic turmoil that that caused. And it’s a story of an opportunity most scientists can only dream of: being able to follow up on previous findings and answering questions raised by previous experiments. Uniquely, this played out during (or perhaps was able to keep going because of) a period in which our knowledge of genetics, and the technologies available, kept on developing. The measuring of neurochemicals, epigenetics, PCR, genome mapping, next-generation sequencing… as new questions were being generated, so new techniques became available to probe deeper into the mysteries of the domestication.

The book makes for fascinating reading and is hard to put down once you start it. Highly recommended.

How to Tame a Fox (and Build a Dog) is available to order from NHBS.

Great Crested Newt eDNA Service with Nature Metrics

Great Crested Newt by Chris H is licensed under CC BY 2.0
What is eDNA?

eDNA or environmental DNA is genetic material found in the environment. This DNA comes from organisms in various forms including (but not limited to) faeces, mucus, gametes, shed skin or hair. Although eDNA degrades over time, it can persist long enough for its presence to be tested from environmental samples.

eDNA sampling for Great Crested Newts

Sampling and testing of eDNA in pond water is a relatively new, but increasingly popular, method of determining presence of Great Crested Newts. Provided that the sampling and analysis protocol complies with DEFRA guidance and that samples are collected between 15th April and 30th June, then eDNA test results are accepted by Natural England and Natural Resources Wales.

Unlike traditional methods of bottle trapping or torch searches, collecting pond water samples for eDNA analysis has very low impact on newts and other pond inhabitants. It also has obvious benefits in terms of labour time, and ecologists are less restricted to specific times of day for surveying. It could also provide a more accurate method of determining the presence of Great Crested Newts which are notably difficult to survey reliably. The technique is not without limitations, however, and can be problematic in ponds with large amounts of algae or sediment or where accessibility is a problem.

How do you collect and analyse eDNA samples?

The sampling process involves the use of a sterile ladle to collect 20 samples of pond water which are then mixed together in a bag. A small volume of this pond water is then added to each of six tubes containing a preservative solution and control DNA. These tubes are returned to the lab where quantitative PCR (qPCR) is used to amplify and measure the GCN DNA (if present), thus determining the presence of GCN eDNA in the samples.

NHBS and Nature Metrics

This spring, NHBS will be working with Nature Metrics to provide a complete GCN eDNA analysis service. Combining our expertise in sourcing, packing and shipping equipment with the excellent laboratory proficiency of Nature Metrics, this partnership will allow both teams to focus fully on our strengths in order to provide a fast and efficient service.

For more information about Nature Metrics and the eDNA, Metabarcoding and Metagenomics services they can provide, please visit www.naturemetrics.co.uk

 

New Bat Detectors for Spring 2017

It’s that time of year again. Spring has sprung earlier than ever, and the survey season will very soon be under way. In this post we look at some of the fantastic new bat detectors due for release this spring.

Anabat Swift

The Anabat Swift from Titley Scientific is based on the excellent design of the Anabat Express and records in full spectrum as well as zero crossing. Users can choose between sample rates of 320 or 500kHz and a built-in GPS receiver automatically sets the clock, calculates sunrise and sunset times and records the location of the device.

 

Echo Meter Touch 2

The Echo Meter Touch 2 is perfect for bat enthusiasts and students and will let you record, listen to and identify bat calls in real-time on your iPad, iPhone or iPod Touch. All you need is your iOS device, your Echo Meter Touch 2 and the Echo Meter Touch App which is a free download from the iTunes store.

Echo Meter Touch 2 Pro

Designed for consultants and professional bat workers, the Echo Meter Touch 2 Pro has all the great features of the Echo Meter Touch 2 but with additional user options such as an adjustable sample rate (256kHz and 384kHz), adjustable gain and advanced trigger settings.

Batcorder Mini

The compact Batcorder Mini has a very simple user interface with just a single button to start and stop recording. Calls are recorded in full spectrum onto the built-in memory (64GB) and the internal lithium-ion battery is chargeable by USB. A built-in GPS receiver sets the time, date and location.

Ultramic384 Ultrasound Microphone

This high performance ultrasound microphone will connect to a USB port for real time listening and can also be used as a stand-alone recorder when used with a USB battery. An internal microSD card slot allows data to be recorded.

Batcorder GSM

The Batcorder GSM is designed for use at a wind turbine site and includes a microphone disk which is inserted directly into the turbine nacelle. The unit runs off mains power from the turbine and a GSM function lets you receive status messages, reassuring you that everything is recording correctly. A Raspberry Pi setup also lets you backup your files to a memory drive and download data directly or over an internet connection.

 

 

Our full range of bat detectors can be found at www.nhbs.com