Author interview with Michael J Warren: The Cuckoo’s Lea

Weaving together early literature, history and ornithology, The Cuckoo’s Lea takes the reader on a journey into the past to contemplate the nature and heritage of ancient landscapes. It explores the stories behind our placenames, alongside historical accounts of bird encounters thousands of years ago, their hidden secrets, the nature of places and more. 

Michael J. Warren is a naturalist and nature writing author who teaches English at a school in Chelmsford. He was an honorary research fellow at Birbeck Colledge, curates The Birds and Place Project, and is a series editor of Medieval Ecocriticisms. We recently had the opportunity to speak to Michael about The Cuckoo’s Lea, including how he first became interested in birding, what he discovered throughout his research for this book and more. 


Firstly, can you tell us a little bit about yourself, and how you became interested in birds and birding?

Professionally I do many different things, but birds, the natural world, conservation and environmentalism are central to all of it. I’m an English school teacher as well as an academic working in the environmental humanities (my PhD was on birds in medieval poetry), so literature, language and history are always intertwined with my love of nature and nature writing. I was formerly chair of the New Networks for Nature group and am currently a trustee for the charity Curlew Action, where I advise on education as it relates to the forthcoming Natural History GCSE. 

I’ve been into birds and birding for as long as I can remember, having been encouraged by my uncle and aunt who are both keen naturalists themselves, but most of all I was inspired by my parents as they did one of the best things I think any parent can do for a child – they educated me in the great outdoors. By which, I meant that all our holidays were in various wild locations across the UK, involving ramshackle cottages in remote valleys and by secluded rivers, from which my brothers and I were free to roam, exploring and playing each morning. I have a deep passion for British landscapes and wildlife, and I am who I am today because of those early experiences. They shaped me profoundly, and I’m now trying to do the same with my two daughters (which is working so far, but they’re still young and impressionable right now!) 

What inspired you to write a book on the history of place names with avian origins? 

Initially this idea came from my academic research on birds in medieval literature and culture. When I started to explore the presence of bird species in place names in the realm of medieval studies by default as most English place names are Old English in origin and can be traced back to the Middle Ages – I was astounded by just how many there were. I knew there was something really fascinating to examine, including what these names could tell us about people’s ecological knowledge and relationships over one thousand years ago. Every name is a story. 

One of my reviewers has kindly described The Cuckoo’s Lea as a ‘Rosetta stone for our ecological knowledge’, but it’s the place-names that are the stone. They provide us with a portal into the imagination of early people who were encountering and interacting with these environments. I realised that placenames were the perfect subject for my first narrative nonfiction book as it combines birds, landscapes, medieval history and ecological history, while also providing the opportunity for me to travel to different places, experience them first hand, and collate all these elements into a personal narrative with broad appeal. 

Eurasian Cranes at St. Benets Abbey by Nick Goodrum, via Flickr

Each chapter focuses on a different location and species across the UK. How did you decide which areas to focus on and which of the many species that reside there to highlight?

I went back to the drawing board a lot with that one! 

I wrote this book alongside becoming a father: six years of raising two daughters through those early years combined with six years of research, travel, and writing at 4am in the morning because that was the only way to carve out writing time until I got my book deal with Bloomsbury. As such, practicality determined a lot of it I travelled to locations I could feasibly reach within my budget (at one point we were living on my part-time salary and my wife’s statutory maternity pay) and the restricted time available. Under other circumstances I would have liked to have travelled farther afield for the book to Ireland, for instance.  

My selection was also determined by the range of species that I thought would most appeal to readers. So, although there’s a danger of over-featuring certain birds in nature writing, I knew I had to include cuckoos, cranes and nightingales in the book because everyone loves them! These three species were also popular in medieval culture too, so it made sense to feature them, and I lived in Cranbrook (Kent) for most of the time I was writing the book, so that provided an obvious starting point. 

I also thought hard about the range of ideas I wanted to explore relating to how birds evoke and define place for us and allowed this to lead me towards particular birds and/or places. For instance, I wanted to write about the soundscape of birds as a phenomenon that both animates or shapes place a recurring idea in the book. This meant that owls became important as, to me, they exemplify this enthralling idea that our ancestors naturally and happily recognised bioacoustics as distinguishing properties of a place’s atmosphere. Finally, and again practically, it was also imperative to have some geographical range to my adventures so any reader would be able to read about somewhere in their home county or a nearby county. 

What was the most surprising discovery you made whilst researching this book? 

I think it was the sheer number of species represented in Old English placenames.  

I don’t think you would expect birds to turn up so frequently in placenames, given that you’d want a place-marker or identifier to be reliably solid, present and static and birds don’t tend to remain static much of the time. Some of the species that can be found in our placenames, such as swallows and cuckoos, aren’t even in Britain for much of the year! On this basis, wrens, buntings, snipe, dunnocks and sparrows aren’t species I expected to find. 

There’s also nowhere that really matches the range of species in English placenames. Gaelic does have a good range across both Ireland and Scotland, but it’s difficult to trace the origins of the names beyond the 19th or 18th centuries as the cultures were oral, so names often weren’t recorded until the first OS maps were produced. 

On the flip side, I was also surprised by the species that aren’t in our place-names nightingales, for instance. This species was highly prominent and celebrated in both medieval art and poetry, and would have been much more populous than they are today, so how is it that they didn’t find their way into placenames? (That doesn’t stop me having a chapter on nightingales, by the way.) The same goes for corncrakes. There was an Old English name for the bird, and their calls would have undoubtedly been an unavoidable and loud sound of summer throughout the land. Herons only appear once or twice, and, perhaps most surprisingly, the robin (or ruddock in Old English) doesn’t feature at all! 

Cuckoo at Thursley Common by Alan Shearman, via Flickr

Finally, can you tell us what you’re working on at the moment? 

Right now, I’m focused on making a success of The Cuckoo’s Lea! 

Alongside booking readings, signings and talks, I’m also creating a website titled The Birds and Place Project (birdsandplace.co.uk) which aims to record the birdsong of all the species mentioned in English placenames which is quite an undertaking! It will be a lifelong project as I’d like to extend it beyond England and the English language to include other countries and languages found across Britain and Ireland. I see it as an extension of my book; and as a site for anyone to find out about this fascinating, but currently little-known, aspect of our natural history and heritage. 

Beyond that, I’ve got my eye on my second book, provisionally titled Hibernal: The Obsessions of a Justified Winter Lover. I’m a serious winter fanatic, so I’ve known for some time that my second book will be a meditation on my favourite season. It will be an emotional and personal journey into my obsession with winter, including encounters with those living and surviving the season in the far north, as well as those who can’t stand winter and suffer terribly in the darkness and cold. Plus, it will highlight historical stories about the importance of winter, how previous times and cultures coped with it, and discuss how winter as a season is changing because of climate change. I don’t think there’s much chance of me commencing this book in 2025, but then again, if this book is going to take me another six years, I can’t waste a single winter… 

The Cuckoo’s Lea is available here

#NoMowMay 2025

a vibrant patch of flowering Red Clover

2025 marks the fifth year that NHBS has participated in Plantlife’s #NoMowMay campaign which encourages people across the UK to put away their lawnmowers and let their grass grow wild throughout the spring, with the aim of providing vital habitats for a wide range of species. As in previous years, we requested that the verges and lawns surrounding the premises be spared from mowing or strimming from late April and all through May to allow more plant species to flower.

We’ve seen good numbers of daisies, buttercups and Germander Speedwell alongside a handful of charming clover species including Red and White Clovers and Black and Spotted Medick. Ribwort Plantain, Common Vetch, Ox-eye Daisy and docks are adding height in places and a handful of common grass species are present and swaying nicely.

Common Spotted Orchid

We do have one beautiful Common Spotted Orchid flowering now as June begins, though sadly, there’s not been returning Bee Orchids this year, for the first time while we’ve been participating in the campaign.

There’s been a fair few bees, wasps, flies and beetles visiting the flowers, though invertebrate activity all round has felt somewhat diminished from previous years. Through May we had scattered sightings of Orange-Tip, Peacock and Tortoiseshell butterflies, and now as June is arriving Meadow Browns have emerged.

#NoMowMay is a fantastic initiative by Plantlife that has highlighted the importance of giving wild plants places to thrive through a crucial stage in their lifecycles and therefore enrich and advance the opportunities for pollinator species, and the wider web of life that depends upon green spaces, including us humans. It’s vital that spaces are left wilder for longer than May, and to encourage this, Plantlife are encouraging the public to let their lawns or grassy areas continue to bloom through June (and again, ideally beyond) with #LetitbloomJune! We’re hopeful that our lawn will be left to flower throughout the summer too.

Outside NHBS at the beginning of June 2025

At NHBS we offer a large variety of books for learning more about habitat maintenance, the importance of species who rely on the restoration and reinvigoration of wilder spaces and many helpful field guides for identifying who’s growing in and visiting your local park or garden!


Suggested Reading

A Field Guide to Grasses, Sedges and Rushes
Spiralbound | April 2016
£13.99

 

 

 

 

Harrap’s Wild Flowers: A Field Guide to the Wild Flowers of Britain & Ireland
Paperback | February 2025
£20.00

 

 

 

Collins Wild Flower Guide: The Most Complete Guide to the Wild Flowers of Britain and Ireland
Paperback | June 2016
£24.99

 

 

 

The Book of Wilding: A Practical Guide to Rewilding Big and Small
Hardback | May 2023
£35.00

 

 

 

The Biodiversity Gardener Establishing a Legacy for the Natural World
Hardback | April 2023
£25.00

Celebrating 40 Years of NHBS: A journey of passion and commitment to natural history and the environment

NHBS is proud to celebrate its 40th anniversary, marking four decades of supporting those who work to understand, protect, and conserve the natural environment. 

History of NHBS 

Founded by Bernard Mercer in 1985 as the Natural History Book Service, NHBS began as a mail-order supplier of ornithology books based in London. Our first catalogue was hand-crafted on a state-of-the-art electronic typewriter! Within two years, we evolved into a comprehensive natural history bookstore, committed to supplying all in-print literature on both natural history and science. Shortly after, we relocated to Totnes in Devon, and we have remained here on the edge of the River Dart ever since. 

By the late 1980s, in response to customer demand, NHBS expanded its subject range to include habitat and species conservation, climate change, environmental assessment and more. In May 1995, we ventured online with the launch of our first website, and as digital communication grew, our website and email newsletters became increasingly important, leading to our final newspaper catalogue in 2005. 

At the start of the new millennium, NHBS began expanding its range to include products such as bat detectors, trail cameras and moth traps, having recognised the growing demand for nature-based equipment. Today, we offer a comprehensive range of books and practical equipment for ecologists, researchers, educational professionals, and wildlife enthusiasts alike. 

“Celebrating 40 years is a testament to the dedication and passion of our team and the unwavering support of our customers. We are committed to continuing our mission to provide the best resources and tools for those who strive to protect and understand our natural world.” 

Bernard Mercer – Founder and owner 

NHBS Around the World

NHBS’s global customer base has led to us sending products to even the most remote corners of the world. These include the Black River in Mauritius, Ascension Island, Benbecula in the Hebrides and Mount Athos in Greece. Our parcels have reached over 140 countries, supporting researchers, educators, and conservationists wherever they are based. 

NHBS parcel distribution

The NHBS Mission 

Since we began in the 1980s, our core purpose has been to support individuals and organisations working to understand, protect, and conserve the natural environment.  

Forty years on, this continues to drive us, shaping our decisions and inspiring our ongoing work in the conservation world.  

We’re have collaborated with a wide range of leading NGOs such as Butterfly Conservation, The Riverfly Partnership and Buglife, and to date, we have donated over £35,000 to support their vital work. In 1999 we also developed the Gratis Book Scheme, which was launched alongside the British Ecological Society and successfully delivered hundreds of books free of charge to students living in developing countries. 

Thank you and Looking Ahead 

As we reflect on the past 40 years, we’re grateful for our valued customers and the countless individuals and organisations we’ve had the privilege of supporting. We are proud to have forged close partnerships with many conservation organisations who share our values – the Mammal Society, Butterfly Conservation, Bat Conservation Trust and CIEEM, to name just a few, and we look forward to working together to better British conservation. 

Looking ahead, we are excited about the future of NHBS and the continued pursuit to fulfil our mission to empower and support those working in conservation. 

Thank you for being part of our journey and we look forward to the next 40 years! 

The NHBS team 

The NHBS team at our recent 40th anniversary celebration

Equipment in Focus: CHASING Underwater Drones

CHASING’s range of underwater drones (also known as Remotely Operated Underwater Vehicles – ROUVs) includes high-end consumer and heavy duty industrial-grade models.  The drones capture high resolution underwater images and video, allowing unobtrusive, accessible monitoring, surveying or exploration of aquatic spaces. With technological applications ranging from reef monitoring and marine ecological assessments to aquacultural inspection and general exploration, these innovative devices are a powerful tool for efficient data collection and observation.  

Underwater drones can alleviate health and safety concerns, save time, money, resources and the need for specialist personnel. By providing high-resolution imagery and precise manoeuvrability, this technology allows for the safe, efficient observation and sampling of aquatic environments whilst minimising harm or disturbance.  

In this blog, we introduce you to CHASING’s underwater drones – the Gladius Mini S, the M2 S, M2 PRO and the M2 PRO MAX.  

CHASING Gladius Mini S in field


Consumer Models

Gladius Mini S

CHASING Gladius Mini S droneThe Gladius Mini S is a highly portable consumer-grade drone for underwater exploration. Quick to deploy, with a maximum operating time of around four hours, the Gladius Mini S requires little preparation to get started and can be operated by one person– simply attach the tether, controller and accessories, and connect your mobile phone to the CHASING app. The Gladius can operate in temperatures between –10 and +45°C, and at depths up to 100m. High-quality video and still images are captured with the 4K image stabilised camera and powerful integrated lights, producing excellent underwater imagery. The Gladius Mini S has one mounting point, which can support accessories such as the grabber claw and underwater GoPro mount. 

The Gladius Mini S is available in four packs: Standard pack with a 100m tether, Standard pack with a 200m tether, Flash pack containing grabber claw B and a 100m tether, and a Flash pack containing grabber claw B and a 200m tether.  

  • An upper-end consumer-grade drone 
  • 100m max operating depth 
  • Five thrusters 
  • 100m or 200m tether included (dependant on package) 
  • One mounting point 

See the Gladius Mini S underwater drone in action

We also recently tested the Gladius Mini S in Plymouth Sound, watch our short video to see it in action.

 

 


Industrial Models  

Alongside the consumer model, there are a number of industrial-grade drones that are better suited for larger scale projects – the CHASING M2 S, M2 PRO and the M2 PRO MAX. The main advantage of these models is the use of interchangeable batteries, additional accessories and an increased tether length for longer sessions. Each industrial model benefits from a 4K camera, up to 4 hours run time, 150° field of view, e-reel compatibility, and powerful vectored thrusters allowing for precise movement. Here, we explore these models a little further, outlining the differences between each drone and their benefits.  

Find a summary of the M2 series specifications below: 

Comparison table of CHASING drones

CHASING M2 S

CHASING M2 SMarking the first step up from consumer models, the CHASING M2 S benefits from eight thrusters for maximum stability and a high response speed. The unit features multiple accessory ports that are suitable for grabber arms, distance lock sonars, laser scalers and floodlights, as well as third-party accessories such as GoPro cameras. With the ability to swap batteries, and a greater range of compatible accessories, the M2 S is equipped for longer sessions with increased capabilities. An upgraded colour restoration algorithm improves the image transparency, clarity, colour, layering and noise on the M2 S, and live feed can be streamed onto multiple devices.  

This model is available in three packages, each with varied tether lengths, accessories and spare parts. 

  • An entry-level industrial drone 
  • 100m max operating depth 
  • 8 thrusters 
  • 200m tether included 
  • One mounting point 
  • More compatible accessories than consumer models*

*To view the full range of compatible accessories please see the above table 

CHASING M2 PRO

CHASING M2 PRO underwater droneThe M2 PRO has an increased operating depth and is compatible with more accessories than previous models. It is the first model that is compatible with the Shore-based Power Supply System (SPSS), allowing for unrestricted power supply to enable 24/7 operation. It is also the first to accommodate the control console – a professional platform designed to control the drone, AC power, external lights and other accessories. The M2 PRO can operate at depths of 150m and is designed to house larger batteries to accommodate an increase in drone size and accessory power.  

The M2 PRO is available in two packages: Professional and Advanced.  

  • A mid-range industrial drone 
  • 150m max operating depth 
  • 8 thrusters 
  • 200m tether included 
  • One mounting point 
  • Compatible with the Shore-based Power Supply System and the control console 
  • An increased range of compatible accessories 

CHASING M2 PRO MAX

CHASING M2 PRO MAX underwater droneThe M2 PRO MAX is the most advanced model in our CHASING range, presenting a top-of-the-line industrial drone for NGO’s, researchers, government bodies and enterprise users. This upper-level model has five mounting points to attach an assortment of around 20 compatible accessories, including water samplers, sonar and sediment samplers. Eight powerful thrusters propel this drone to depths of up to 200m with 360° movement. For improved image clarity, the M2 PRO MAX has offset LED’s, helping to solve interference by the reflection of matter in front of the camera lens.  

The M2 Pro Max is available in two packages: Professional and Advanced. 

  • Top-of-the-line industrial drone 
  • 200m max operating depth 
  • Eight thrusters 
  • 200m tether included 
  • Five mounting points 
  • Compatible with the Shore-based Power Supply System and the control console 
  • Over 20 compatible accessories 

Applications  

Deep sea coral polyps

Underwater drones, or ROUVs, provide an alternative, accessible tool for ecological and scientific research. Their applications extend far beyond observation, enabling researchers to conduct detailed ecosystem health evaluations, monitor invasive or threatened species, and perform habitat inspections – all with the capability to collect samples for off-site analysis. From assessing the source of underwater pollution, to conducting biodiversity surveys, these drones provide high-resolution imagery and real-time data, facilitating well-evidenced conservation action. Their ability to perform targeted water and physical sampling allows for detailed analysis of aquatic environments, which can reveal insights into aquatic biodiversity and ecosystem health.  

Outside of its ecological applications, this technology has potential in search and rescue operations, item recovery, hull and dock inspection and energy facility inspection.  


Find the CHASING range and accessories on the NHBS website here. Check out our latest YouTube video of the Gladius Mini S in action here.

See the Gladius Mini S underwater drone in action

If you have any questions about our range or would like some advice on the right product for you then please contact us via email at customer.services@nhbs.com or phone on 01803 865913. 

This Week in Biodiversity News – 31st March

Conservation 

A new exclusion zone has been established along the Anglesey coastline to protect vulnerable wildlife. The RSPB have been granted permission to safeguard the area, which serves as vital breeding ground for Choughs, and key habitat for Peregrine Falcons, rare British plants and lichens. The exclusion zone will remain in place until 15th September to minimise harm from recreational activities in the area, such as coasteering. 

Kentish Glory Moth
Kentish Glory Moth (rotated) by Michael Taylor via Flickr

In collaboration with Butterfly Conservation, Natural England, and Forestry England, Twycross Zoo has launched a project to reintroduce the extinct Kentish Glory moth to England. Since the launch of the project, conservationists have collected DNA samples from existing populations in the Cairngorms to help improve the chances of a successful reintroduction, and over the coming months, conservationists will conduct feasibility evaluations, with the Wyre Forest noted as a potential reintroduction site. 

Policy 

The UK is set to introduce a Natural History GCSE, one of the first new GCSEs in a decade. Confirmed by the Education Minister on the 21st of March, the curriculum will cover both local and global environment, from local wildlife and habitat to global climate challenges and sustainability. Intended to foster an understanding and protection of nature, the new GCSE will be delivered nationwide, with a revised criteria to provide fieldwork opportunities to young people. The government will consult on the curriculum this year, ensuring relevance for both urban and rural students. 

Glass eels will no longer be exported to Russia from British estuaries after a UK government ban. Defra refused a request to send millions of glass eels to a restocking project in Kaliningrad, ending a trade that saw roughly three million eels exported last year. The species, red-listed and down 95% since the 1980s, was previously shipped via a conservation loophole from the UK. Conservationists argue these eels should instead be used to replenish depleted English and Welsh rivers. 

Red Grouse
Red Grouse by Caroline Legg via Flickr

Labour has announced plans to ban deep-peat burning in England, in order to protect vital habitats, reduce carbon emissions, and safeguard wildlife. These plans target the practice of burning vegetation, which is often utilised to create habitat suitable for grouse hunting. Labour’s plans seek to tighten the existing legislation introduced by the previous Conservative government, expanding protected areas by 146,000 hectares. UK peatland is estimated to store 3.2 billion tonnes of carbon alone – intentional burning of peatland vegetation releases stored carbon and can harm wildlife residing in this habitat.  

Brazil’s ‘Poison Bill’ has loosened restrictions on agrochemicals that are hazardous to human health and the environment. A dramatic surge in pesticide use has been observed within the Amazon – specifically, the use of mancozeb has increased by a staggering 5,600%, and atrazine by 575% in just over a decade, despite their bans in the EU. Experts warn that these relaxed controls will severely impact the Amazon’s biodiversity, posing heightened risks to Indigenous peoples, riverside communities, and small farmers exposed to these harmful substances. 

Science 

An exhaustive global analysis of over 2,000 studies, and 100,000 sites across all continents, confirms the profound impact of human activity on biodiversity. This landmark paper marks the first attempt at combining results from so many studies and provides unprecedented clarity on the influence of human activity. Researchers identified distinct shifts in community composition and marked decreases in local diversity across all habitats and species groups included in the study, and five drivers of loss – including habitat change, resource exploitation and pollution – had strong impacts on diversity loss.  

Whale shark by Daniel Gillaspia

Equipment in Focus: BirdMic Parabolic Microphone

The BirdMic is a compact, directional parabolic microphone.  Intended for bird calls, BirdMic allows users to listen, record and identify species on their smartphone in real time with the help of a bird identification app, such as Merlin Bird ID. It is self-powered, easy to use, and requires no previous experience to get started.

BirdMic in use in the countryside


BirdMic Kit Includes:  

  • Parabolic dish (25cm diameter) 
  • Omnidirectional microphone 
  • Audio interface (to connect your smartphone, camera or field recorder) 
  • Headphones 
  • Hand grip 
  • Windshield 
  • Flash shoe adapter 
  • Various cables and adapters for smart phone connection 
  • Extension tube to attach field recorder 
  • Carrying bag 

Ideal for the capture of bird song, BirdMic features a high sensitivity (-24dB), low noise (S/N 80dB) omnidirectional microphone to provide crisp recordings with excellent clarity. It is most suited to sounds above 1,500Hz, making it ideal for bird song.  

The parabolic dish is made from durable ABS material and amplifies sound through collecting and focussing sound waves – waves bounce from the inner face of the dish and are directed onto the microphone at the centre, isolated and amplified and transmitted to a digital recording device. 

Attaching directly to the parabolic dish, the audio interface allows the connection of a smartphone which can also be mounted via the included brackets. Once connected, simply open an automatic ID app, like Merlin, to record birds in real-time. Headphones can also be connected for live monitoring. 

BirdMic in the field

Tom took BirdMic along the banks of the River Dart to test the performance of the microphone and see how it compares to using just a smartphone. 

We simply set up the Birdmic, plugged in a smartphone and turned on the audio interface. With an overall diameter of 25cm and a weight of 1kg, the whole set up was extremely easy to transport 

A screenshot of the Merlin app spectrogram
Spectrogram of bird song captured with BirdMic using Merlin.

Our thoughts

We were really impressed with the BirdMic! It was very simple to assemble and use, and worked well to isolate and amplify bird sound in different conditions.  

At just 1kg, it is very lightweight – the overall design makes this parabolic easy to walk around with, and its handy size and weight minimises arm strain when holding the microphone.  The highly sensitive microphone worked well and was able to pick up bird song from a much greater distance than a smartphone. The directional microphone makes it ideal for homing in on a particular song, and allows the user to pinpoint the birds location. This also helps to eliminate any underlying noise in the background of the recording – for instance, water flow, wind or traffic noise.

We feel the Birdmic offers great value and is very easy to use. It is an entry-level parabolic that is ideal for a keen birdwatcher, or birding and naturalist groups looking to capture, listen to or record bird sound. As a lightweight, sturdy recorder, there is also significant potential for educational purposes, and it could be utilised in outdoor education clubs and classes to encourage an interest in nature by younger generations.

Birdmic in use along the river dart


Find the BirdMic available exclusively on the NHBS website here. Our full range of sound recorders can be found here. 

If you have any questions about our range or would like some advice on the right product for you then please contact us via email at customer.services@nhbs.com or phone on 01803 865913. 

Q&A with Trine Bregstein: The Riverfly Partnership

The Riverfly Partnership is a collaborative effort between anglers, conservationists, scientists, and water managers to protect the health and quality of our rivers. They use citizen science to monitor riverfly populations, which are sensitive indicators of water quality, and gather data on these fascinating insects to contribute to a better understanding of river ecosystems.

We recently had the opportunity to speak with Trine Bregstein, riverfly partnership development manager, about the work of the Partnership, their citizen science initiatives, the importance of riverflies and more.


Can you give an overview of the Riverfly Partnership, its aims and the work that the group is involved in? 

The Riverfly Partnership is a network of organisations supporting projects to assess river health. The aims of the partnership are to protect the water quality of our rivers, further the understanding of riverfly populations, and conserve riverfly habitats. The partnership comprises many individuals and groups, including entomologists, angling clubs, volunteer groups, wildlife charities and Rivers Trusts.  

We have data on freshwater invertebrate life dating back to the early 2000s, collected by a dedicated base of citizen scientists that is continuing to grow. Volunteers get to learn about the fascinating world of tiny critters living in their waterways, which are referred to as the canaries of our rivers because they are an important indicator of water quality. The work of Riverfly monitors means pollution incidents are quickly detected and reported, changes in water quality are monitored over time and the impacts of restoration work in and around the river can be tracked.  

 

Can you tell us about the Riverfly Monitoring Initiative?

The Riverfly Monitoring Initiative (RMI) is a citizen science scheme in which trained monitors collect data about the invertebrates living in their local river. Volunteers are trained in the identification of key groups of riverflies, which are invertebrates that spend most of their life cycle living in fresh water. The initiative mainly focuses on the orders Ephemeroptera (also known as up-wing flies or mayflies), Plecoptera (stoneflies) and Trichoptera (caddisflies).  

Invertebrate sorting and identification. Credit: Trine Bregstein
Invertebrate sorting and identification. Credit: Trine Bregstein

On a monthly basis, monitors carry out kick sampling at their site and count the numbers of each group of riverflies they have collected. From these counts, an RMI score is generated. This score is compared to the ‘trigger level’ of the site, which is a number set by the local ecology contact at the statutory body. If the RMI score is below the trigger level, it may be an indication that a pollution event has taken place. Another sample is done to confirm the breach, and then the relevant authorities are informed.  

 

What are the main challenges associated with your work? 

The national scale of the project, with various regional hubs coordinating groups of monitors at a local level, means it’s important to make sure things are done consistently across the network. We at the Riverfly Partnership HQ in the Lake District facilitate and try to keep track of what’s going on in all of these separate groups, and make sure training and protocols are standardised around the country to ensure the robustness of the data set. This can prove challenging, particularly as many of our hubs are charities and trusts that may not have consistent funding for citizen science projects, whilst others are volunteer run and rely on people managing to co-ordinate their groups in their spare time.   

A group of volunteers standing around the riverside edge during a training day
Ribble training day. Image credit: Trine Bregstein

 

How did 2024 fare for the Partnership and its work?

2024 was a great year for the Partnership. Our monitors submitted 7,832 surveys to our database over the year – this is up from 6,392 in 2023, which reflects how much the partnership is continuing to grow, with many new monitoring groups set up all over the UK. We also launched a new Riverfly data dashboard for easy viewing of all this data. 

 

Citizen science is of increasing importance in wildlife conservation across the globe. How can we get involved and be proactive in protecting our rivers and riverfly populations? 

Riverfly monitoring involves carrying out a survey at your allocated site once per month, usually taking about an hour. As a monitor, you’d be contributing to a trusted, long-term, open-access data set that can be used to track gradual changes in habitat quality, as well as quickly pick up on any major incidents that the statutory body can investigate.  Anyone can become a Riverfly monitor – no prior knowledge is required; you just need to have attended a training day led by one of our accredited tutors.  

Kick sampling in a river
Gwent Wildlife Trust sampling. Image by Gareth Edge

If you’re interested in becoming a volunteer, e-mail info@riverflies.org and we will link you up to your local co-ordinator. Most training tends to take place in the spring and summer months, but you can register your interest at any time. 

Aside from Riverfly monitoring, you can also get involved in the Rivers Trust’s Big River Watch, Earthwatch has the Great UK Water Blitz, The Angling Trust has the WQMN (Water Quality Monitoring Network), ZSL run the Outfall Safari project, and through the CABA and CaSTCo projects other organisations around the UK have been able to cascade this initiative to their volunteers. Check your local Rivers Trust or Wildlife Trust to see what volunteering opportunities they have, for example balsam bashes, riverside clean ups or restoration works like reed bed planting, tree planting and fence building.  

Gwent Wildlife Trust members holding certificates following training
Gwent Wildlife Trust training. Image credit: Gareth Edge

There is so much to get involved with, and on a personal level, try look after your own patch. If you’re out walking the dog for example, try to keep them out of the water if they’ve had a recent flea treatment, take a couple of bits of rubbish to the nearest bin (safely, don’t pick up anything potentially dangerous) and know who to call if you spot something untoward – the EA/SEPA/NRW/NIEA for pollution, your local council for fly tipping and don’t forget to report sewage and water leakage problems to your local water company too, they all have helplines or online reporting options.  

 

What projects will the Riverfly Partnership be working on next? 

We have a scheme called ‘Extended Riverfly’, which is a more advanced version of Riverfly monitoring that experienced monitors can move on to. It involves identifying and counting 33 groups of invertebrates, rather than the eight in the Riverfly Monitoring Initiative. It’s a fairly new scheme, currently only operating in certain parts of the country, but we recently held an event at which many Riverfly trainers upskilled to become extended trainers, so we’re looking forward to rolling out this project to many more groups in the coming year. 

Extended training at the natural history museum
Extended training at the Natural History Museum. Image Credit: Trine Bregstein

We’re also working on our ‘Targets and Triggers’ project, which has been developed with partners at the Environment Agency, the Scottish Environment Protection Agency, Buglife and CaSTCo. We’re aiming to devise a standard, and relatively easy, method for trigger levels to be set, making it easier for statutory bodies to engage with Riverfly monitoring without it being too much of a drain on their limited resources. Through gathering extra data about each monitoring site and running these through a predictive model, we plan to come up with not just trigger levels, but expand the initiative so that sites also have a ‘target level’ – the maximum RMI score that we would expect to see at a site, which gives a goal for habitat improvement projects to aim for.  


Riverfly Partnership Approved kit

The Riverfly Partnership Approved Kit is a complete kit suitable for water quality monitoring. The Riverfly Partnership receives £5 from the sale of this kit to help them continue their fantastic conservation work.

Please see the Riverfly Partnership website for more information on how to get involved.

The NHBS Harp Trap: New Model Assembly Instructions

This blog provides a step-by-step guide on to how to set up and disassemble the latest model of the NHBS manufactured Harp Trap.

Please note that the NHBS Harp Trap is a made-to-order item, contact us at customer.services@nhbs.com for enquiries and we will be happy to advise on the current lead time.


Handling your trap

The trap carry bag has been designed to allow handling/carrying by either one or two people.

 

What’s in the bag?

1 × Harp Trap, 4 × legs, 2 × support poles (in two parts), 1 × accessories pack (including instructions, 4 × pegs, 4 × guy ropes and spare line)

The contents of the harp trap


Please follow these instructions for correct assembly and disassembly. We recommend that this is carried out by two people.  

Setting Up

1 . Carefully remove the harp trap from its carry bag and place the frame upright on the floor.

Remove the harp trap from the frame and place upright

2 . Take the legs out of the carry bag and insert them into the holes on the underside of the frame – it is easiest to do this one end at a time. When required, all legs can be individually adjusted to raise the trap or to level out when setting up on uneven ground.

3 . Undo the straps and allow the collecting bag to settle by opening the arms of the frame out fully. If using guy ropes, attach them to the upper carriage now.

Undo the straps and allow the collecting bag to settle by opening the arms of the frame out fully. If using the guy ropes, attach them to the upper carriage now.

4 . Release the spring locking pins at both ends of the trap by pulling the lever out and rotating 90° to lock in the open position. Grab the longer piece of the support poles and hold upright with the connector facing down. Now, loosen the star handled screw and carefully lift the top carriage, raising it away from the main frame. Insert the support pole through the hole, where you removed the upper carriage from, and allow the poles to sit on the floor. Then insert the top carriage locating pins into the open end of the support poles.

5 . If using guy ropes, untie and allow to hang.

6. Working at the same pace, slowly raise the support pole so that the bottom of the pole is just below the lower part of the main frame, watching closely to ensure no strings get tangled. Once you reach this height, tighten the star handled screw to secure the support pole in position.  

7 . Take the shorter parts of the support poles and attach them to the bottom of the longer parts by screwing together.

8 . With the support poles now at their full length, while holding on to them, loosen the star handled screw and continue to raise them, still working together and checking for any string snagging. Raise until the bottom of the pole is level (or as near as possible) with the bottom of the frame and tighten star handled screws. 

9 . Engage both spring locking pins to secure the lower carriage.

10 . If you are using them for stability, you can now peg out the guy ropes and your trap is ready for use.

 

Disassembly

1 . If used, pull out the pegs and store them carefully.  

2 . Release the spring locking pins from both ends of the trap. Hold the support poles (one person at each end) and loosen the star handled screws to lower the poles 

3 . Continue to slowly lower the poles and as you do so, carefully start winding the bottom line carrier, taking great care to ensure no lines get tangled. Guiding the lines with your hand/arm is key. Keep lowering the support poles slowly and evenly while winding the line carrier until the support poles rest on the floor.  

4 . With the support poles resting on the ground, tighten the star handled screw to hold the pole in position, unscrew the lower/short part of the support pole and safely place to one side.  

5 . Hold onto the support pole, loosen the thumb screw, and continue to lower until the pole sits on the ground. If used, gather up the guy ropes, tie them up, detach from the frame and place safely to one side.  

6 .  Now lift the top carriage off from the top of the support pole, slide the pole out from the frame and place to one side. Continue to lower the top carriage, whilst winding the bottom carriage, until the top carriage sits on the main frame.  

7 . Once the top carriage has been lowered fully, engage the spring locking pins and tighten the star handled screw to secure it in place, fold the arms of the catch bag assembly inwards until they meet, wrap the bag around the trap and tie the straps to secure.  

8 . Remove the legs from the frame, working on one end of the frame at a time is easiest. If you have extended the legs, to aid storage, reduce them to their shortest length. 

9 . Place the guy ropes and pegs back in the accessories bag. Put the legs and the support poles in the bottom of the carry bag and finally, carefully place the trap and accessories bag back into the carry bag, safe and sound, ready for next time.  

The NHBS Guide to UK Corvid Identification

There are eight species of corvid in the UK, five of which belong to the Corvus genus. They are intelligent birds, with many studies finding species demonstrating self-awareness and tool-making abilities. Their brain-to-body mass ratio is only slightly lower than ours and equal to cetaceans and non-human great apes.

Corvids occur worldwide, except for the polar ice caps and the southern tip of South America. Certain species are a common sight in our urban areas, having adapted to the proximity of humans. Some surveys have even found that fitness and reproduction have increased due to human development. Crows and ravens have been shown to have high reproduction rates and a positive association between annual survival and proximity to human development.

The crow family feature heavily in mythology and folklore, often as omens of ill fortune or death, though magpies can also be considered a herald of fortune. This is thought to have derived from their scavenging behaviour, feeding on carrion at battlefields. They were considered by some to be ‘soul guides’, there to carry to dead into the afterlife. Ravens feature in Scandinavian mythology, as the god Odin had two ravens that would tell him secrets they’d heard. This communication also features in Anglo-Saxon history. This is most likely due to the ability of many corvid species to mimic sounds in their environment, including human speech. They do this by using their two ‘syrinxes’, vocal organs located at the base of the bird’s trachea, which is made of ossified cartilage, muscles and vibrating membranes. As corvids have excellent memories, they can be taught a wide range of words and sentences.

All species are listed as green by the Birds of Conservation Concern 4, with the Eurasian Jay being upgraded from its previous amber status.

Carrion crow (Corvus corone)

Distribution: Common and widespread, although less common in northwest Scotland. They are found across many habitats, including woodland, farmland, heathland and urban areas.
Wingspan:  84–100cm
What to look for: An all-black species, they have a shiny, thick black beak that is of medium length, and black legs. Their black plumage has a glossy sheen. They are fairly solitary and are most likely seen alone or in pairs, but they can occasionally form flocks.

Carrion Crow by Alexis Lours via Flickr

Jackdaw (Corvus monedula)

Distribution: Common and widespread, except for parts of the Scottish Highlands.
Wingspan: 64–73cm
What to look for: The jackdaw is a black species with a distinctive silvery patch on the back of its head. It has pale eyes that are quite easy to see. Their beaks are shorter than carrion crows, though both have an extended patch of feathers on the top of their beak.

Jackdaw by hedera.baltica via Flickr

Rook (Corvus frugilegus)

Distribution: Widely distributed across most of the UK, although less widespread in Scotland and mostly absent from far northwest Scotland. They are mostly seen in open fields but can be found along roadsides and occasionally in parks and villages. They mainly avoid the centre of larger towns and cities.
Wingspan: 81–99cm
What to look for: This species is black, with a distinctive bare, greyish-white face and a peaked head. Rooks also have a thinner, paler beak than other corvids, such as carrion crows. This beak darkens towards the tip. Juveniles do not have a bare face, therefore can resemble other all-black corvids such as crows, but they can be distinguished by their peaked head.

Rook by hedera.baltica via Flickr

Jay (Garrulus glandarius)

Distribution: Widespread across England, Wales and Northern Ireland, present in parts of Scotland except in the north.
Wingspan: 52–58cm
What to look for: This colourful bird is a light brown to pinkish-grey, with a pale throat and prominent black moustache stripes. Their forehead and crown are pale with dark stripes. The upper surface of their wings is white and black, with a distinctive bright blue patch patterned with black bars. Their tail is white or pinkish underneath but their upper tail feathers are mainly black.

Jay by Airwolfhound via Flickr

Magpie (Pica pica)

Distribution: Widespread across the UK, except the highlands.
Wingspan: 52–62 cm
What to look for: This species has a distinctive black and white plumage, with a purple-blue shine to the wings and a green shine to the tail. They have a black beak, black legs and black leg feathers.
Did you know? Magpies have long been associated with folklore in many countries, with a wide range of beliefs. Magpies have been thought to signal death, bad luck, good luck, fortune-telling and happiness. They are also the centre of the well-known ‘one for sorrow’ nursery rhyme where the number of magpies signals different events and occurrences. Depending on the version, gatherings of magpies can signal a birth, funeral, wedding, gold, silver, the gender of a child and even the devil.

Magpie by Airwolfhound via Flickr

Raven (Corvus corax)

Distribution: Widespread across Wales, Northern Ireland and the West of Scotland and England. They are found across a number of habitats, including woodland, farmland, upland and marine habitats.
Wingspan: 115–150cm
What to look for: This is the largest member of the crow family, with an all-black plumage, a large bill and long wings. Their necks are thick, with a shaggy appearance. They have a diamond-shaped tail, best seen in flight. They closely resemble the carrion crow, except for their much larger size, but they can resemble raptors such as buzzards in flight.

Raven by Imran Shah via Flickr

(Red-billed) Chough (Pyrrhocorax pyrrhocorax)

Distribution: Small, isolated populations along the west coasts of Wales, Cornwall and Ireland, as well as the Isle of Man.
Wingspan: 73–90cm
What to look for: Choughs have a blue-black plumage with a green sheen to their wings and tail. They have a slender, red bill that curves downward. Its legs are red with black claws. Juveniles have an orange bill and either pink or grey legs.
Did you know? In 2002, a pair of choughs raised young in Cornwall for the first time in more than 50 years. They continued to nest successfully for over a decade, raising 46 chicks in total. In 2022, the population reached 200 birds, with 25 pairs successfully raising over 70 young.

Red-billed chough by gailhampshire via Flickr

Hooded crow (Corvus cornix)

Distribution: Present in Northern Ireland, north and west Scotland, and the Isle of Man. In winter, it is present on the eastern side of England.
Wingspan: 93–104cm
What to look for: This species has an ashy-grey plumage, with a black head, throat, tail, wings and thigh feathers. It has a black beak and legs, with dark brown eyes.
Did you know? The hooded crow was thought to be the same species as the carrion crow until 2002 when they were given full species status.

Hooded crow by Ott Rebane via Flickr

Suggested reading and equipment:

Marzluff, J. M., and Neatherlin, E., 2006. Corvid response to human settlements and campgrounds: Causes, consequences, and challenges for conservation. Biological Conservation, 130(2), pp. 301-314

Møller, A. P., 2010. The fitness benefit of association with humans: elevated success of birds breeding indoors. Behavioral Ecology, 21(5), pp. 913-918

Twenty years of cornish choughs and another bumper year.

Europe’s Birds: An Identification Guide

 

 

 

 

 

Collins Bird Guide, 3rd Edition

 

 

 

 

 

 

RSPB Spotlight: Crows

 

 

The NHBS Guide to UK Thrush Identification

Thrushes are passerines in the family Turdidae. They are found worldwide. The family was once much larger before biologists determined that the former subfamily Saxicolinae (chats) were Old World flycatchers rather than thrushes. Some thrushes are permanently resident in warm climates, while others migrate to higher latitudes during summer, often over considerable distances. There are four species that regularly breed in UK as well as two winter visitors that also occasionally breed here.

These small to medium-sized ground living birds feed on mainly on insects, other invertebrates and fruit. They generally inhabit wooded areas, creating cup-shaped nests that are sometimes lined with mud. They lay between two to five speckled eggs, with two or more clutches a year.

All the thrushes listed below are protected under the Wildlife and Countryside Act 1981, including their eggs and nest sites, with several included on the UK Red or Amber List. Song thrushes have even been designation as a Priority Species under the UK Post-2010 Biodiversity Framework.

Blackbird (Turdus merula)

Distribution: This is the most common and widespread thrush, present all year round.
BoCC5 status: Green
Wingspan: 34–38cm
What to look for: Males and females look different, with males being all black, with bright yellow eye-rings and beaks, while females are a redish-brown, with a speckled appearance and duller yellow eye-rings and beaks. The female’s beak can also be dark brown.

Male blackbird by Jacob Spinks via Flickr

Female blackbird by Jacob Spinks via Flickr

Fieldfare (Turdus pilaris)

Distribution: These are winter birds, with only a few remaining to breed in the UK all year round.
BoCC5 status: Red
Wingspan: 39–42cm
What to look for: This is a slight larger bird, with grey heads, necks and rumps, though they have a dark strip across their eye to their orange and black beak. Their backs are dark brown and their tails are black, with a tinged orange throat and a paler, puff coloured breast. They are speckled with dark markings, which are larger on their breast. Their underside is pale.

Fieldfare by hedera.baltica via Flickr

Mistle Thrush (Turdus viscivorus)

Distribution: Widespread, across the whole of the British Isles throughout the year. They are absent in parts of the northern and western isles of Scotland.
BoCC5 status: Red
Wingspan: 42–48cm
What to look for: This is the largest of the thrushes, with a dark brown back and paler underside and throat that is speckled with dark brown. It has a pale eye-ring, cheeks and lores. They stand quite upright and have orange legs and an orange and dark brown beak.

Mistle Thrush by ianpreston via Flickr

Redwing (Turdus iliacus)

Distribution: This is a winter visitor, arriving from late September onwards and leaving again in the summer. They’re found across the UK, except for parts of North Scotland.
BoCC5 status: Amber
Wingspan: 33–35cm
What to look for: This species is the smallest thrush that regularly visits the UK, similar in appearance to the song thrush. Their distinctive feature, however, is the bright orange-red patch on their sides under each wing, as well as the pale stripe over their eye.

Redwing by Alison Day via Flickr

Ring Ouzel (Turdus torquatus)

Distribution: Summer visitors are found in the uplands of Scotland and northern England, as well as parts of north west Wales and Dartmoor. During spring and autumn, when they migrate, they may be spotted along the east and south coasts of the UK.
BoCC5 status: Red
Wingspan: 38–42cm
What to look for: Males are black, with a pale panel on their wings and a bright white band across their breast, resembling a bib. Females are similar but their colouration is much less striking, looking like a ‘washed out’ version of the male. Both have an orange and black beak and black legs. Their wings and underside feathers have pale outlines, and some can have white patches on their heads.

Male ring ouzel by Nick Goodrum via Flickr

Female ring ouzel by Stefan Berndtsson via Flickr

Song Thrush (Turdus philomelos)

Distribution: Found across the UK, through missing from parts of Northern and Southern Scotland.
BoCC5 status: Amber
Wingspan: 33–36cm
What to look for: This, other than the blackbird, is probably the most well known member of the thrush family. They are a small bird, browner than the mistle thrush, with smaller speckles. Their sides and cheeks are yellowish, with a paler underside, eye-ring, undertail and legs. Their beaks are yellow and black.
Did you know? The male song thrush copies other birds’ songs, creating a repertoire that it sings on repeat, often to reinforce territories and attract mates.

Song thrush by ianpreston via Flickr

Suggested reading:

 

Collins Bird Guide, Volume 3

 

 

 

 

Europe’s Birds: An Identification Guide