pH Meter Calibration and Maintenance

pH Meters
A pH meter is a key part of the field and lab worker’s tool kit.

Modern pH meters are extremely efficient and provide highly accurate results if they are well looked after and correctly calibrated. A key part of this is taking care of the pH electrode. In this post we will discuss how you can maintain the accuracy and lifespan of your equipment by following correct pH meter calibration, cleaning and storage guidelines.

The main components of the pH meter are the glass electrode and reference electrode which are housed together inside a thin glass membrane. The pH meter calculates pH by measuring the difference in potential, or voltage, between the two. A well cared for electrode will last for up to two years, although use at very high temperatures or with abrasive chemicals may reduce this. It is also important to make sure that you have the correct meter for your sample type: for example, a pH meter designed for use in soil samples will have a different electrode type to one which is designed for liquids.

To maximise the lifespan of your electrode and ensure that it provides consistently accurate readings, a small amount of care and attention is required. Below we answer the most common questions relating to pH meter calibration and care.

How do I calibrate my pH meter?

193227pH meter calibration requires two or more pH buffers. A buffer is a solution of known pH which is used as a standard to ensure the electrode is producing accurate results. The most commonly used buffers are pH 7.0, 4.0 and 10.0. Some pH meters will require two buffers for calibration whilst others require three or more. If you are using only two buffers then you will begin your calibration with the pH 7.0 solution and then use either pH 4.0 or pH 10.0 as your second buffer, depending on whether your sample is acidic or alkaline respectively.

The instructions provided with your meter will detail the calibration process. In general, this will involve dipping your electrode into a buffer and waiting for the reading to stabilise. You will then adjust the pH meter to read the correct pH on the display or, if your meter features automatic calibration, it will automatically adjust itself. This process is repeated with the following buffer(s) until the process is complete and the meter is ready to use. Always remember to rinse your electrode in distilled water between different buffer types and make sure to read your manual carefully before calibrating the meter for the first time.

Buffer solutions are available to purchase in 500ml bottles or as packs of 20ml sachets. Sachets are ideal for infrequent use or for use in the field.

How do I clean my pH electrode?

227513Cleaning your electrode will ensure that it stays in optimum condition and will help to maintain accuracy and efficiency. To use a cleaning solution simply place your electrode in it for 15 to 20 minutes then rinse with distilled water and store as recommended below. For pH meters which are designed for use in soil, a cleaning solution for soil deposits is available which will help to eliminate all impurities and residues which are left on the electrode after use.

How do I store my pH electrode when not in use?

180243When your pH meter is not in use the electrode should be kept immersed in storage solution. This stops the electrode from drying out and keeps it clean and protected until required again. Most pH meters come with either a specially designed cap, into which a small amount of storage solution can be added, or they come with a storage bottle which can be topped up with solution. Make sure to check the level of the storage solution regularly as it will evaporate over time. If the electrode is allowed to dry out then it will no longer function correctly and will have to be replaced.

Take a look at the NHBS website for our full range of pH meters, buffers, cleaning and storage solutions. For replacement electrodes, please contact us to discuss your requirements by phoning +44 (0)1803 865913 or emailing customer.services@nhbs.com

 

Made by NHBS – The Ichthyoplankton Net

These bespoke nets, made by NHBS, are being used by ZSL in an ongoing project to monitor juvenile and larval fish populations in the Thames.
The Ichthyoplankton Net

Earlier this year we were contacted by the Zoological Society of London (ZSL) who were interested in working with us to make a bespoke aquatic survey net.

Their specifications required the net to have a square frame with a four point bridle and connections for a flow meter. It also needed to have a diving vane which would ensure that it could be towed stably at a set depth, and a screw on cod end with a bag made from 53µm and 250µm mesh. Following these guidelines, our engineer and seamstress got to work and within a couple of weeks a detailed specification was agreed. The nets were then manufactured and two were sent to ZSL in February.

First draft of the net design

Several months later we were delighted to receive some photos from Anna Cucknell, who manages ZSL’s work on fish conservation in the Thames, showing the nets in use.

 

 

“It was great to work with NHBS, who listened to our specific needs to design bespoke sampling nets for juvenile fish, and used their experience to adapt our designs to fit our needs. Our juvenile fish surveys on the Thames are the first of their kind, in scale and resolution and we hope the results from which will be applicable in the Thames and further afield to help drive conservation and better management of our estuaries for all fish species”.
Anna Cucknell, Thames Project Manager, Zoological Society of London

Ichthyoplankton Net in the Thames
Nets are towed both at the surface and at a depth of two metres. Combined with data from seine and intertidal nets, these surveys provide a comprehensive picture of larval and juvenile fish populations.
Fish Conservation in the Thames

The nets we made for ZSL are being used for an ongoing project to monitor the use of the Thames by juvenile fish.

The Tidal Thames is home to more than 100 fish species including many that are commercially important such as Dover sole and European seabass. It also provides critically important habitat for rarer species, including European smelt and European eel.

Like most estuaries, the Thames provides invaluable spawning, migratory and nursery grounds but, despite this, the region is poorly studied. The ZSL project hopes to remedy this by providing essential information about the health of fish populations in the estuary, and to assess how these are affected by water quality and local developments.

Boat-based sampling for juvenile fish

The project, funded by Tideway, involves both boat-based and foreshore sampling and, excitingly, also provides an opportunity for volunteers to get involved via its citizen science scheme. Volunteers can help with a variety of tasks including measuring, identifying and counting the fish.

For more information about the Tidal Thames fish conservation project, head over to the ZSL website

Interested in getting involved? Sign up here to volunteer.

Have a bespoke project in mind? Contact our engineer, Thomas to discuss your requirements (email thomashk@nhbs.com or phone 01803 865913).

 

Top 10 Bat Boxes for Walls and Fences

Improved Cavity Bat BoxLooking for a bat box but don’t know which one to buy? This article is the second in a three part series designed to help you to make the right choice.

Here you will find our top 10 boxes for installing on an external wall or fence. The first and third posts cover the best options for installing on a tree in a garden, park or woodland and for building into a new build or development.

For each box you will also find helpful information such as its dimensions and weight and the box type (e.g. whether it is for summer use, for hibernation or for access into an existing roost space).

The Glossary below provides a guide to the key terms used in the descriptions.

• Woodcrete/WoodStone: A blend of wood, concrete and clay which is very durable. Is is also breathable and helps to maintain a stable temperature inside the box.
• Summer: Summer boxes are suitable for the warmer months but are less likely to be used over the winter.
• Hibernation: Designed to be larger and better insulated, hibernation boxes will provide a safe and warm space for bats over the winter.
• Maternity: Suitable for the formation of colonies and raising of young.
• Access: Provides an entrance to an existing roof space such as a wall cavity or loft.
• Crevice: Provides one or more narrow roost space. Species which prefer this type of box include common, soprano and Nathusius pipistrelle, Brandt’s and whiskered bats.
• Cavity: Provides a more spacious roost space. Bats such as brown long-eared, Daubenton’s and Natterer’s bats prefer cavity boxes.
• Large cavity: These boxes allow space for flight within the roost which is preferred by brown long-eared bats in particular.


Schwegler 1FF Bat Box1. Schwegler 1FF Bat Box

• Made from: Woodcrete and wood
• Dimensions: 43 x 27 x 14cm; 9.5kg
• Box type: Cavity; summer

 

Schwegler 1FQ Bat Roost2. Schwegler 1FQ Bat Roost

• Made from: Woodcrete
• Dimensions: 60 x 35 x 9cm; 15.8kg
• Box type: Crevice, maternity

 

Schwegler 2FE Bat Shelter3. Schwegler 2FE Wall-Mounted Bat Shelter

• Made from: Woodcrete
• Dimensions: 30 x 25 x 5cm; 2.5kg
• Box type: Cavity, hibernation

 

Chavenage Bat Box4. Chavenage Bat Box

• Made from: FSC Wood
• Dimensions: 38 x 18 x 10cm; 1.2kg
• Box type: Cavity, summer

 

Schwegler 1WQ Bat Roost5. Schwegler 1WQ Summer & Winter Bat Roost

• Made from: Woodcrete
• Dimensions: 58 x 38 x 12cm; 22kg
• Box type: Crevice, hibernation and maternity

 

Improved Cavity Bat Box6. Improved Cavity Bat Box

• Made from: FSC Plywood
• Dimensions: 38 x 24 x 15cm; 1.5kg
• Box type: Cavity, summer

 

Slimline Wooden Bat Box7. Slimline Wooden Bat Box

• Made from: FSC Wood
• Dimensions: 40 x 14 x 12cm; 1.9kg
• Box type: Crevice, summer

 

Beaumaris WoodStone Bat Box8. Beaumaris WoodStone Bat Box: Midi

• Made from: WoodStone
• Dimensions: 65 x 40 x 28cm; 4.4kg
• Box type: Crevice, summer

 

Improved Roost Maternity Bat Box9. Improved Roost Maternity Bat Box

• Made from: FSC Plywood
• Dimensions: 49 x 26 x 13cm; 6.6kg
• Box type: Crevice, maternity

 

Low Profile WoodStone Bat Box10. Low Profile WoodStone Bat Box

• Made from: WoodStone
• Dimensions: 44 x 29 x 9cm; 4.7kg
• Box type: Crevice, summer

 

Browse our full range of bat boxes for external walls.

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.

 

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.

 

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.

 

What’s new for 2017 – Trail camera news

The days are getting longer and the clocks are set to British summer time here in the U.K. With the arrival of the warmer weather, our local wildlife is also becoming more active and now is a great time to set up a trail camera to see what’s going on in your garden or local outdoor space. If you’re lucky you may even spy young animals emerging from their burrows for the first time.

In this article we will take a look at some of our new and favourite trail cameras for 2017.

Bushnell Trail Cameras

This spring has seen a new range of cameras arrive on our shelves from Bushnell, featuring an exciting selection of brand new features.

The new Trophy Cam Aggressor range is available in four models. All of these share an excellent 0.2 second trigger speed and a recovery time of just 0.5 seconds, ideal for moving animals. A new Dynamic Video function means that the camera will record continuously while there is a subject in the detection range and an Auto Exposure function helps to avoid bleached out images when the subject is too close. Three preset functions allow easy configuration of advanced settings based on the location of the camera (choose from trail/scrape, feeder or food plot). The design of the case has also been improved with a strengthened cable lock channel, stronger latch and illuminated button panel.

The four models differ in their image/video resolution, type of night vision LEDs, screen type and case colour. Take a look at our handy guide below to see which is the right model for you.

Trophy Cam Aggressor HD No Glow 24MP Camo

Trophy Cam Aggressor HD No Glow 24MP Camo
* Bushnell code: 119877
* 24MP images
* 1920 x 1080p videos
* No glow LEDs
* Colour viewing screen
* Camouflage bodyshell

Find out more

 

Trophy Cam Aggressor HD No Glow 20MP Tan

Trophy Cam Aggressor HD No Glow 20MP Tan

 

* Bushnell code: 119876
* 20MP images
* 1920 x 1080p videos
* No glow LEDs
* Text screen
* Tan bodyshell

Find out more

 

Trophy Cam Aggressor HD Low Glow 24MP Camo

Trophy Cam Aggressor HD Low Glow 24MP Camo

 

* Bushnell code: 119875
* 24MP images
* 1920 x 1080p videos
* Low glow LEDs
* Colour viewing screen
* Camouflage bodyshell

Find out more

 

Trophy Cam Aggressor HD Low Glow 20MP Tan

Trophy Cam Aggressor HD Low Glow 20MP Tan

 

* Bushnell code: 119874
* 20MP images
* 1920 x 1080p videos
* Low glow LEDs
* Text screen
* Tan bodyshell

Find out more

 

Also new for 2017 is the Trophy Cam Essential E3 which improves on the popular E2 model with the addition of low glow LEDs, an improved flash range and higher resolution images. The fantastic NatureView Live View HD is also still available and features two close-focus lenses and a detachable viewing screen.

Spypoint Trail Cameras

Spypoint produce consistently high quality cameras and their range features several models that are exciting for wildlife enthusiasts.

Spypoint Force-11DThe Force-11D has an unbeatable trigger speed of just 0.07 seconds and an adjustable detection range of 1.5m to 24.4m with a curved motion sensor to improve the detection angle. 11MP images and 720p, high definition video can be captured while no glow LEDs make your camera completely inconspicuous.

 

Spypoint SolarThe Spypoint Solar provides another fantastic option, particularly if you want to leave your camera unattended for extended periods of time. The built-in solar panel will power the camera any time that the sun is shining, only switching to battery power at night or when there is insufficient sunlight. A 2″ colour screen lets you preview your images in the field.

 

All of our trail cameras can be purchased as a starter bundle which include an SD card and all the batteries you need to power the camera. The complete trail camera range can be found at www.nhbs.com

Can’t decide which camera you need? Why not take a look at our guide on choosing the camera that’s right for you.

 

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

 

The NHBS Guide to Pond Dipping

Pond Dipping, Pensthorpe by Spencer Wright
Pond dipping is a fun and educational activity for all ages. Creative Commons “Pond Dipping, Pensthorpe” by Spencer Wright is licenced under CC BY 2.0

Pond dipping is an excellent activity for children of all ages and is a great way to introduce them to a wide range of plants, insects and amphibians. It also offers an opportunity to learn about food chains and food webs as well as discovering variations in lifecycles and the effects of pollution on aquatic life.

For school groups, a pond dipping trip will satisfy many of the criteria for learning about life processes and living things, and it can also be used to provide inspiration for art, maths or English projects. Younger children will enjoy drawing or painting pictures of the creatures they find, as well as writing stories about their experiences.

Don’t forget though that pond dipping isn’t just for children. Ponds, pools and small lakes are an integral part of our ecosystem and surveying the plant and animal diversity within them is an important way of assessing their health. If you are interested in volunteering as a pond surveyor, take a look at the Freshwater Habitats Trust website for more information.

How to pond dip:
  1. Half fill a tray or bucket with water and set aside. Do the same with your collecting pots and/or magnifying pots (if using).
  2. Use a net to dip into the pond. Sweeping in a figure of eight will ensure that you retain the catch in the net. Areas around the edge of the pond, especially near vegetation, tend to be the most productive. Take care not to scoop up mud from the bottom of the pond, as this will clog up your net and make it difficult to see what you have caught.
  3. Gently turn the net inside out into the tray. Once everything has settled, you should be able to view a fascinating selection of pond-dwelling creatures. A pipette can be used to transfer individual specimens to a magnifying pot for a closer look.
  4. Use a guide such as the Freshwater Name Trail or the FSC “What’s in my Pond” pack to identify the creatures found. For adults or older children a more in depth guide such as Ponds and Small Lakes or the New Holland Concise Pond Wildlife Guide will cover a greater range of species.
  5. When you have finished, make sure to return all water and inhabitants to the pond. Trays, pots and nets should be rinsed and dried thoroughly before storage. If you are going to be using nets in different ponds then sterilising using a broad spectrum disinfectant will help prevent the spread of disease.

Please note: Children should always be well supervised and aware of health and safety rules when working near water. Suitable clothing should be worn; wellington boots or other sturdy footwear are recommended.

Pond dipping equipment:

At NHBS we stock both individual and class sized pond dipping kits. These contain nets, trays, pots, magnifier and pipettes, as well as the excellent (and waterproof!) Freshwater Name Trail which will help you to identify the key animals found in UK ponds. Or why not choose from our top 10 list of equipment and books for pond dipping:

  1. Pond Net

Pond Net

Made at our workshop in Devon, the Pond Net is a high quality, lightweight net with a removable bag for cleaning. The bag is made from woven 1mm mesh which is ideal for pond dipping. Also available in a telescopic version.

2. What’s in your Pond?

Find out the names of the insects, plants, amphibians and repiles that you see. Features three of the FSC’s popular fold-out charts: Reptiles and Amphibians (frogs, toads, newts, slow worms, lizards and snakes), Freshwater Name Trail (classic pond dipping guide) and Commoner Water Plants (from lilypads to water mint). Also includes a card-sized magnifier.

3. Heavy Duty Sampling Trays

These strong white trays are ideal for pond dipping as they are robust and stable enough to be carried when full of water. Available in three sizes.

 

4. Bug Pots (Set of 10)

This set of 10 Bug Pots is perfect for pond dipping, as well as general nature studies. Each pot has a 2.5x magnifying lid and a measurement grid of 5mm squares on the base. They are ideal for storing and observing specimens.

 

5. RSPB First Book of Pond Life

Through beautiful full-page illustrations accompanied by key information about each creature, the First Book of Pond Life will help to encourage young children’s interest in the outside world and the wildlife around them. Covers 35 of the most common pond species. Also includes a spotter’s chart for children to fill in and links to internet-based activities.

6. Economy Pond Net

A simple and affordable pond net. Knotless mesh is guaranteed not to run if holed and, importantly, will not harm specimens which are collected in the net. A plastic handle makes it very lightweight. Available in three sizes.

7. Ponds and Small Lakes: Microorganisms and Freshwater Ecology

Suitable for adults and older children, this books introduces some of the less familiar and microscopic species found in ponds such as diatoms, desmids and rotifers. Along with excellent photographs, the book provides useful identification keys so that readers can identify, explore and study this microscopic world. This book is due for publication March 2017.

8. Pipettes

Small pipettes are extremely handy for sorting through and picking up tiny creatures found when pond dipping. They can also be used to transfer samples to microscope slides to look at the microscopic specimens found. These 3ml pipettes are available singly or in packs of 10 or 100.

9. 125ml Collecting Pots

These sampling containers are made from see-through rigid polystyrene and have secure screw-on lids. They are recommended for liquids and so are ideal for keeping specimens when pond dipping or rock pooling. Available either singly or in packs of 10, 30 or 100.  Different sizes of pot can also be purchased.

10. Bloomsbury Concise Pond Wildlife Guide

Packed with information on more than 190 species of animal and plant that inhabit ponds, pools and small lakes in northern Europe. Among the fascinating animals featured are freshwater sponges, hydras, water bears, worms, leeches, water snails, dragonflies and damselflies, frogs and toads, bats, fish, birds, water voles and otter.