Conservation

No Mow May: A Celebration of Wildflower Power

This spring, traditional British lawns are out. Throughout the month of May, Plantlife urges us to let our gardens be wild with #NoMowMay. This exciting initiative encourages us to embrace a wild lawn this spring, providing plants, invertebrates and other wildlife the opportunity to make our gardens a home. No Mow May could transform your green spaces into a colourful kaleidoscope of flowers you never knew were there. From buttercups to bee orchids, here at NHBS we have had an astonishing array of wildflowers in previous years, and we are hoping that this year will be the same!

Knowing when, and how, to mow your lawn to encourage wildflower growth and minimise grass domination can be confusing, and there is no ‘one size fits all’ answer to supporting native wildlife. In anticipation of May, we outline the important things to consider when maintaining your lawn over the coming seasons.

Tightly manicured garden lawns are unable to host the diverse communities associated with a natural space. The artificially constructed environment, with uniform grass length and limited species, prevents our native wildflowers from blooming and our vital insects from settling. Lawn feeds and fertilisers often used to maintain our lawns can result in unnaturally high levels of soil fertility. Such levels can unintentionally diminish the diversity of flora within our gardens, since native wildflowers are adapted to low-nutrient conditions. Associated with higher carbon emissions, time consumption and overall cost, many are steering clear of a high maintenance lawn this spring.

A spring-flowering lawn provides a whole host of benefits for the wildlife within our gardens. Opting for a wild, native lawn provides essential breeding habitats, food sources and physical protection for a number of species. These spaces give wildflowers a chance to bloom and set seed, benefitting both insects, and the predators who rely on them.

A bee orchid in the centre, in front of a wild lawn — Our Bee Orchid (Ophrys apifera) from #NoMowMay 2022. Image by Oli Haines.

So, how and when should we mow?

Less is more! Switching up your mowing routine, or refraining from a mow in some areas, is a great way to maximise diversity in your garden. After a short time, your outdoor spaces can flourish into a haven for wildlife. From voles to vetches, and even British reptiles, watch your garden transform from monoculture to a wild refuge.

Varied grass length, wild edges, or longer patches of lawn are great for attracting local wildlife to your garden. You may find orchids, ox-eye daisy and knapweed in these longer areas, which also provide cover for small mammals that may be wandering through, and shorter areas can boost pollen availability from low-lying flowers, like buttercups and clover. Plantlife advocates for a varied mowing approach with longer patches throughout the garden, alongside shorter areas (aiming to mimic grazing pressures of different herbivorous species in the wild). For instance, you might decide to maintain shorter pathways and areas around patios, but allow other areas of your green spaces to grow freely.

It is important to remove cuttings after lawn maintenance to prevent excess nitrogen in the soil, thus reducing nitrophilic plants (species with a preference for nitrate rich habitat, typically from fertilisers and the decomposition of organic material) in your garden. ‘Cut and rot’ management can be counterproductive when cultivating wildflowers, as low levels of soil nutrition are preferred by many and will harbour the most diversity. In fact, frequent fertilisation and additional nutrition can result in an overall decline of wildflowers, leading to a dominance of nitrophilic plant species.

A garden during No Mow May with varied grass length, wildlife corridors and vegetable patches. — A garden with varied grass length during No Mow May. Image by Allan Harris via Flickr.

Knowing when, and how, to mow during the year is key to maximise flowering of wildflower species, while simultaneously preventing grass domination: to do this, it is generally recommended to mow three times a year; early spring, late summer and in autumn.

A 3-inch, early spring mow is beneficial to kickstart the season, promoting early growth and blooming. An early mow can also help to tackle nitrophiles, like nettles and cow parsley. This can help to prevent competition, allowing wildflowers to grow undisturbed. However, be wary of mowing too early, as this can prevent wildflower seeding and will impact your gardens growth next year.

A summer mow in late July, or August, removes the previous growth, encouraging the bloom of wildflowers later in the season. As far as insects are concerned, the later the mow, the better. Insect species tend to hatch in the warmer parts of spring and summer, so a mow in late August will prevent harm to hatching individuals.

Around late November, an autumn mow can help to promote reseeding and encourages germination in the following spring. Allow the wildflowers in your lawn to finish flowering and let them go to seed, a mow after this allows the seedheads to disperse seeds into your lawn. An autumn cut can also keep grass growth under control, further encouraging germination.

There are also certain considerations to be wary of when forming wild areas in your garden. These habitats will attract a great number of species, who may make your lawn a home. Best practice involves leaving an area of your lawn untouched to house these species, but if you are looking to tidy up your garden after No Mow May, wildlife must be considered. Wildlife in our lawns can be harmed in the process of tidying up our outside spaces. It is recommended to disturb, or walk through patches to be maintained to shoo species from the area. On the first mow, start with a higher cut to give smaller animals a chance to escape. When mowing the lawn, start with garden paths and areas of high footfall, working toward the edges of the garden. This, again, provides wildlife with an escape route through the boundaries of your garden. If your garden has fences or hedgerows, a wildlife corridor along your borders is another way to support visiting animals. Untouched, or lightly managed, strips along these areas can provide a safe space for travel around the garden, providing cover and protection from predators.

hedgehog looking out from a bush — Hedgehog by Kalle Gustafsson via Flickr.

How can we prepare for No Mow May?

If you currently use fertilisers, lawn feed, moss killers or pesticides, abandoning the use of these additives in your garden will allow the soil to recover from these harmful chemicals. This can provide microscopic and invertebrate soil communities a chance to recover, improving the overall health of your soil.

For some of us, early bloomers may already be present in our gardens. Cowslip, violets and primroses may be popping up on our lawns, showcasing the first few flowers of the season. You may consider allowing these to go undisturbed, giving them a head start for spring. Having said that, the best way to prepare for No Mow May is a 3-inch April cut to encourage a strong period of spring growth.

Whether or not you decide to mow the lawn this spring, consider leaving an area of your garden wild. Whether this be a natural lawn or rough borders, we hope you feel inspired to take part in this year’s #NoMowMay!

This Week in Biodiversity News – 15th April

Environment

The UK’s first national assessment of earthworms has revealed that their populations decrease by 2% annually, and overall earthworm population numbers have fallen by a third over the past 25 years. This study, conducted by an ecologist at the British Ornithology Trust (BTO), also concluded that the largest decline in this species has been observed in broadleaf woodland ecosystems. This may now be having detrimental effects on other species, such as woodland birds, who have seen a subsequent population decline of 37% since 1970. Barnes’ study concludes that, if these results are found elsewhere, the long-term decline of this keystone species could affect our ability to grow crops, as worms aid the growth of 140m tonnes of food a year. It may also have catastrophic effects on soil health, ecosystem structure, function, and above-ground wildlife.

Earthworm diving into the soil between some blades of grass with leaves on the floor. — 20060131 earthworm dives by schizoform, via flickr.

Global rainforest deforestation continues at a rate of ten football pitches per minute. Despite widespread efforts to minimise deforestation across the Brazilian and Colombian Amazon, new data has revealed that 37,000 sq km was still removed from previously undisturbed rainforests in 2023. Large increases were noted in Bolivia, Laos and Nicaragua, which has now offset the positive progress made by other countries in the reduction of deforestation. Experts have warned that governments are unlikely to meet their climate and biodiversity commitments due to the continuation of mass deforestation, with many going against the COP28 agreement to halt and reverse the loss and degradation of forests in the next six years. This puts the 2030 zero-deforestation target even further out of reach.

New research has revealed that national parks are failing to tackle the biodiversity crisis, despite these important areas covering 10% of England and 20% of Wales. Due to lack of government funding, the direct grant set aside for national parks has been cut by 40% since 2010, resulting in poor peatland condition, no change in woodland biodiversity in a 5-year period, and a significant decline in river and lake health. Aside from a lack of funding, national parks are not restoring nature as only 13.7% of the land is publicly owned, with the remaining 86.3% privately owned and often intensely farmed. Campaign for National Parks is calling for a new deal that ensures the government sets a clear mission to increase nature protection and restoration in the UK’s national parks, and subsequently double core national park grants to reinstate this vital funding to its 2010 level.

Dartmoor landscape with cloudy sky but sun shining on the grass, with the moors in the background and a tor stone in the foreground. — Dartmoor by dreamgenie, via flickr.

Discovery and reintroduction

One of the world’s most elusive moles has been sighted in Australia. The Northern Marsupial Mole, or Kakarratul, lives in one of the most remote parts of Australia and is only sighted a few times each decade. Due to their rarity, authorities are still unsure of their population size and these creatures remain a mystery to most of the world. However, the Kanyirninpa Jukurrpa Martu rangers discovered the rare, blind Northern Marsupial while working in the Great Sandy Desert, making this the second species sighting in six months.

Progress has been made in the first ever shark translocation project, which aims to reintroduce Zebra Sharks to the Raja Ampat archipelago in Indonesia after the species was declared functionally extinct due to overfishing and habitat degradation. This is the first initiative attempting to translocate shark eggs from an aquarium to a hatchery before releasing them into the wild. Two sharks have recently hatched on the island of Kri and will be kept in tanks until they are strong enough to be released into the wild. The project aims to release 500 Zebra Sharks by 2032 in the hope of creating a genetically diverse breeding population that will aid long-term species recovery. If successful, this rewilding project will set a strong example of how to re-establish endangered species populations in marine ecosystems and would be a breakthrough for future conservation efforts.

Zebra Shark swimming in the sea over a rocky seabed with fish swimming above it. — Zebra Shark by Daniel Sasse, via wikimediacommons.

Climate crisis

A record hot March leads to fears of faster rates of climate change. Last month was the hottest March on record, reaching 1.68°C warmer than in pre-industrial times. This marks the tenth record breaking monthly temperature in a row, and scientists are concerned that they may not temporarily fall, as expected, after the El Niño period due to the warm weather experienced at the end of 2023. Researchers are now trying to ascertain whether the changes in El Niño are a phase shift or just an anomaly in long-term climate trends. Although they are unsure how conditions in the Pacific Ocean will evolve over the coming months, current predictions suggest it could be replaced by a full La Niña cooling phase.

Q&A with Matt Larsen-Daw and Alana Scott: Celebrating 70 years of the Mammal Society

The Mammal Society, founded in 1954, is a UK charity formed to support evidence-based mammal conservation in Britain and Ireland. The Mammal Society is involved in promoting and enhancing conservation initiatives working to restore mammals and their habitats, with the overall mission of securing thriving populations of native species.

The Mammal Society will be celebrating their 70th anniversary in 2024, which will be the focus of this year’s annual mammal conference. The conference will focus on the past challenges and successes of mammal conservation, and discuss opportunities for future work.

Matt Larsen-Daw is the CEO of the Mammal Society. Having worked with WWF for some time leading education programmes, Matt is now working with the local mammal groups at the base of the Society’s work. Alana Scott works as communications officer for the Society, with a strong history in conservation biology and ecology. She also has significant achievements in the reintroduction of Water Voles in southern Cornwall.

In anticipation of the upcoming National Mammal Week (22nd – 28th April), we recently had the opportunity to talk with Matt and Alana about the successes of The Mammal Society, their upcoming 70th anniversary and goals for the future.

Small dormouse resting on a branch in front of leaves. — National Mammal Week is an annual event encouraging awareness and conservation of mammals. Image by The Mammal Society.

Firstly, could you give us a brief insight into how The Mammal Society came into existence back in 1954?

Seventy years ago, in 1954, The Mammal Society was formed under the name of The Mammal Society of the British Isles (TMSBI), following a meeting of prominent zoologists, naturalists and the Zoological Society of London. The aim was to link amateurs and professionals in promoting the study of mammals, and by doing so to power conservation of mammals at a time when an alarming decline in the populations of several species was already being observed.

Three years later the society started to deliver on its remit when it published its first book – A Field Guide to British Deer. Perhaps some well-thumbed 1st editions of this vintage text are still sitting on shelves? More likely readers may have one of the beautifully illustrated 4th edition copies of this handbook, published to coincide with another significant anniversary – the 60th year of the British Deer Society – in 2023. The British Deer Society is one of several organisations (including the Bat Conservation Trust and SeaWatch) that started their lives as subgroups within The Mammal Society, until their objectives became sufficiently ambitious and broad in scope to warrant a separate charity. This highlights one of the key roles that The Mammal Society has played over the past seven decades. By acting as a lightning rod for discussion and research around the big issues in mammal science and conservation, the Society has convened experts and enthusiasts to foster collaboration and initiate vital projects at all levels of mammal conservation. From collaborative research projects to species-focused organisations and grassroots local groups, the work of the Society has helped shape the mammal conservation sector we see today.

What do you think has been the key to the enduring success of The Mammal Society?

A key factor in the ongoing success of The Mammal Society is the community of mammal specialists and nature enthusiasts that has formed around it in the form of our members and local groups network. The staff team at the Society has never been big – in fact we are often assumed to be much bigger than we are, due to our vibrant social channels and the large influence we have on policy and practice. Our Council of Trustees, our Committees, and our ever-growing community of local mammal champions are just as important in the achievement of our aims. We are nothing without our members, and we hope that we give plenty back to those who join us in our mission to support and protect British mammals. Members receive our acclaimed seasonal magazine Mammal News, receive substantial discounts on our trainings and events, and have the opportunity to influence the priorities and projects of the Society. Why not join, or gift membership, today?!

At the hub of this thriving community of volunteers and supporters, the staff team arranges forums, events, training, campaigns and research projects that channel the huge energy and expertise in the wider community, while ultimately strengthening and energising that same community.

Our small size has allowed us to be agile and respond to urgent challenges quickly and efficiently – such as the discovery of the non-native Greater White-toothed Shrews in Britain in 2022. It also means our overheads as a charity are low – ensuring that we can put every penny of membership fees and donations to good use in our work to ensure a bright future for mammals.

A group of people smiling in a field with a wheelbarrow. — ARK (Action for the River Kennet) participants of a Harvest Mouse Survey, 2023.

The world has changed a lot in the last 70 years. Have the key purposes and goals of the charity evolved during this time to adapt to this changing world, or have they broadly remained the same?

Conservation science is powerless without first being able to answer the questions ‘what to conserve?’ and ‘where to conserve?’; to do this we need to know, for each species, how large the population is, where it is (and was) distributed, and its status, threats and requirements. This science is exactly what The Mammal Society has been promoting since its inception, seeking to ensure that whatever the approach needed, it is undertaken in the right way – informed by science and data.

This central remit has certainly not changed. However, the role of The Mammal Society in the conservation sector was a hot topic of discussion in the first few decades. In 1963, a resolution was passed at a meeting that the Society should be ‘a scientific body to which those in authority can turn for factual information about mammals and mammal biology’, upon which to base a judgement of the conflicting claims of different champions. To be accepted as such a body, the Society should not itself become involved in any way with […] controversial matters. In other words, The Mammal Society should gather and present scientific facts but not campaign for any particular action to be taken. This perspective shifted within ten years, with members wanting the Society to be prepared to call for action where it was scientifically justified. Nowadays we certainly consider ourselves to have a key role not only in establishing scientific evidence, but also in ensuring it is seen, understood and acted upon to bring positive outcomes for mammals. Communicating the science and advocating for its application are as important as the science itself if we want change.

The other facet of our work that has become more important in recent years is communicating the importance and wonder of mammals to public audiences, in order to build public support for mammal conservation and encourage more engagement with life sciences – especially among younger people and communities currently under-represented in conservation. This objective is part of our remit to strengthen and energise the conservation sector. For example, our annual Mammal Photographer of the Year competition allows us to spotlight photographers who have captured beautiful and surprising images of mammals in the wild and inspire others to share in their wonder and excitement at spotting our elusive wild neighbours going about their everyday lives.

In 1995, The Mammal Society entered a new phase when it established a network of local groups that could monitor the state of mammals in their area and respond to local issues while playing a key role in contributing to a better national picture of mammal populations. Through this process of evolution, The Mammal Society moved from connecting amateurs to professionals in mammal conservation, to providing anyone concerned about the decline of mammals with ways to get involved and directly help tackle the key issues.

Some of these original groups are still going strong, and others have joined in the nearly 30 years since then. Led by volunteers, these groups provide opportunities for nature-lovers from all walks of life in their community to support citizen science activities that provide essential data and insight to inform mammal research, conservation practice and landscape management policy.

Now we have more than 30 local mammal groups in the network, and their contribution to projects such as the Mammal Atlas, the Harvest Mouse Survey and many other projects cannot be under-estimated – as well as the profound impact many have had on mammal populations locally through their targeted efforts. The Mammal Society have sought to guide and support these groups over the years, but we feel there is much more we could do.

Our new Local Mammal Groups Strategy (reflected in our new Local Groups Handbook) sets out how we intend to invest in growing, strengthening and diversifying the community of local mammal champions that participate in mammal conservation at the grassroots level through the local groups network.

Red squirrel peeking out from behind a Silver Birch tree on the right and directly looking at a Bumblebee flying towards the tree. — The Squirrel and the Bee. Image by Garry Watson, winner of the Mammal Photographer of the Year competition, 2024.

Biodiversity loss and the climate crisis are key issues for everyone involved in conservation at present. What are your main goals for the coming years and decades?

Seventy years on, the challenges that need to be overcome to ensure a bright future for wildlife and people are just as daunting. This means that over the decades to come, our role as convener and mobiliser in the world of mammal conservation will be more important than ever. There is no doubt that reversing the loss of nature will require work from everyone, and the more joined-up those efforts are, the more positive the impact for wildlife and people.

As we move into our eighth decade, we continue to do everything we can to foster collaboration and inclusion in mammal conservation. We aim to bring the scientific insight and expertise of our committees, members, council and staff to strengthen and support any initiatives that can help address the threats faced by our native mammals. As an active member of Wildlife & Countryside Link, we are already adding our voice to those of varied stakeholders across the nature sector to call for urgent action to address issues and redress shortcomings in policy and practice. Via European Mammal Conservation Europe, we have strengthened joint challenges on issues such as the protected status of wolves in the EU. We are active contributors to the RSPB-led UK State of Nature Report, and members of coalitions and steering groups on various species recovery strategies. We continue to engage with government to ensure that policy and priorities are informed by science.

Our commitment to ensuring that everyone understands the importance of mammals, and can play a role in monitoring and protecting mammals, is reflected in our reinvigorated approach to supporting local groups – including an equipment loan scheme, free training for local groups, and an ambitious plan to see at least three new groups in currently under-represented urban areas by 2025. Alongside this our new school programme launches this year, creating opportunities for young people to explore and support mammals, and prioritising schools in areas of deprivation and serving communities under-represented in conservation.

A group of children sat at a school desk dissecting owl pellets. — Owl pellet dissection as part of the new school programme.

Seventy years as a successful charity is an incredible achievement, not to mention the research, support and training you have undertaken and provided during this time. How are you marking and celebrating this important milestone?

We’re spending 2024 looking back, and looking forward. We want to celebrate what’s been achieved over the past 70 years but also to take the opportunity to look at the challenges ahead and how we can all play a role in meeting them.

To help us highlight this significant milestone, talented illustrator Silvie Tonellotto has designed our beautiful 70th anniversary badge, which will feature on communications throughout 2024. You can see more of her work on Instagram (@silvietonelottodesigns).

An illustrated dormouse sat inside the number 70. — The 70th anniversary badge, designed by Silvie Tonellotto.

One of the key things we are focusing on is celebrating the people whose actions are key to ensuring a bright future for mammals, and especially to show the rich diversity of people and variety of roles people can play in supporting mammal conservation. We have therefore marked this 70th year with the launch of a new awards scheme – Mammal Champions. NHBS generously supported the prizes for the 2024 awards, and we’re delighted to have been able to shine a spotlight on some incredible volunteers, campaigners and thought leaders.

National Mammal Week (celebrated in the autumn in previous years, but now moving to a new home in the spring) is 22nd to 28th April 2024. We’ll be celebrating the wonderful individuals shortlisted for Mammal Champions Awards, while also providing loads of opportunities for anyone in Britain and Ireland to find ways to become mammal champions in their own lives and communities.

Learn more and get involved through The Mammal Society website.

This week in Biodiversity News – 1st April

Increasing shortages of early season food threatens bumblebee populations. A new study published by the Universities of Oxford and Exeter has revealed that pollinator-friendly plant species are now flowering up to a month too late to aid bee conservation, resulting in low colony survival rates and reduced queen production. The reduction in pollen and nectar availability during the March to June period, which is critical during the early stages of colony formation, can have catastrophic effects on colony populations, with research suggesting that a two week gap in pollen supply reduces the production of daughter queen bees by up to 87%. To combat this decline, it is recommended that existing hedgerows should be populated with early blooming species such as Ground Ivy, cherry, and Hawthorn, which would increase colony success rates from 35% to 100%.

Photograph of a bumblebee flying towards a yellow flower. — Bumblebee by James Johnstone, via flickr.

A pioneering translocation project aimed at saving a rare species of fungus in now underway in Cumbria. The Willow Glove fungus is a critically endangered species that can now only be found in two woodlands in Scotland, with the majority of it living on a single fallen tree. Scientists have recently removed sections of dead wood that the fungus is living on and relocated it to three receptor sites in an attempt to prevent the species’ impending extinction. The fungus is being transported to protected sites of special scientific interest where the fungus was last recorded before it became extinct in England 50 years ago. Host trees have been selected due to their plentiful supply of willow glue, a parasite that the Willow Glove depends on for survival. The success of this relocation technique will be monitored by volunteers from Cumbria Fungi Group for the next five years.

RHS Rosemoor aims to rediscover lost, native apple varieties to help the fruit survive climate breakdown. This spring, horticulturalists are searching for lost varieties of apple trees that used to be abundant in ancient orchards, with the goal of discovering the genetic traits of those species that are still thriving today. The University of Bristol and Sandford Orchards will each receive the genotypes of apple species that have been deemed important from across England and plan to investigate the rare ‘survivor varieties’ that have not been propagated, collected or recorded before. The hope is that their genetic code can be preserved for future use in an attempt to safeguard biodiversity and boost the UK apple industry’s resilience to climate change, particularly for those species that are native to this country. This project will play a vital role in the sustainability of the UK’s commercial orchards, 80% of which have been lost since 1900.

Closeup image of Apples hanging off a tree in an orchard. — Apple Orchard by Sue Thompson, via flickr.

Discovery

A newly discovered orchid species boasts the longest nectar spur of any known plant relative to its flower size. The Solenangis impraedicta, found in the forest canopies of central Madagascar, is the first orchid discovered since 1965 that has made extreme adaptations to allow only a certain species to access its nectar and facilitate pollination. Its hyper-long nectar spur, measuring 33cm, makes it the longest of any known plant when compared to its small flower size of only 2cm, and researchers suggest it may only be accessible to the Long-tongued Hawkmoth. The significance of this discovery has been noted due to the similarities between this species and Darwin’s Orchid (Angraecum sesquipedale), which is also native to Madagascar. Darwin speculated that only a moth with an exceptionally long proboscis could reach the nectar, while Alfred Russel Wallace further built on this in his predication that a hawkmoth would be the only species able to do so. Finding this rare orchid highlights the urgency of conservation measures in Madagascar that are necessary to combat the rapid rate of deforestation occurring on the island.

Hummingbird Hawkmoth in flight while feeding off a purple flower. — Hummingbird Hawkmoth by Peter Stenzel, via flickr.

An ancient species of river dolphin has been discovered in the Peruvian Amazon. A team of palaeontologists have found a giant fossilised skull on the shores of the Napo River that belonged to the largest-known species of river dolphin in history. This colossal creature, measuring 3-3.5 metres in length, is not related to the native Amazon River (Pink) Dolphins, but rather the South Asia river dolphins who are found 10,000km away. Researchers suggest that the dolphins’ ancestors originally lived in the ocean but ventured into the abundant freshwater ecosystems of the proto-Amazonia, before becoming extinct when new habitats emerged and their prey vanished.

Environment

The earliest-ever sighting of the Asian Hornet suggests they may now be established in the UK. The Department for Environment, Food and Rural Affairs (DEFRA) has recently confirmed that an Asian Hornet was sighted and captured on the 11th March in Kent – one month earlier than the first hornet sighting of last year. Once hornets are established, it’s almost impossible to get rid of them, and with Asian Hornet numbers having skyrocketed in the UK in 2023, scientist are concerned that they are now overwintering in the UK. This may have detrimental effects on wild pollinators emerging from hibernation, particularly Britain’s bee populations which play a key role in agricultural pollination.

Toads in the Roads

It is in the earliest months of the year, when the weather turns milder and deeply saturating rains arrive, that adult toads, frogs and newts begin to emerge from their wintering hibernacula and make their long-standing annual journeys to the waterways in which they breed. It’s an ancient way of life for amphibians and a behaviour that pre-dates humankind by millennia.

Close up of a Toad crossing a loose, stony road at night. — Toad – Oli Haines

Roads are a relatively new addition to the landscape by comparison. A blink of an eye in toad evolution. They frequently bisect the paths that amphibians must navigate in order to reach their ancestral ponds. Being relatively slow-moving, small, and cryptically coloured, amphibians are incredibly vulnerable on tarmac roads. As such, it is estimated that two tons of toads are killed on roads each year in the UK.

This February was one of the warmest and wettest on record in England, and it felt every bit of it. Despite the gloom of early darkness and torrential rain, I was thrilled to sign up and join an enthusiastic local volunteer group of Toad patrollers, deep in the Devon laneways, to learn what work is being done to mitigate our impact on the amphibians currently making these critical journeys.

The Toads on Roads project was spearheaded by the amphibian charity Froglife over twenty years ago. Volunteers that are involved in the project put in considerable effort each year to monitor known and established toad crossings around the country. These are the places where toads gather in their largest numbers and are at significant risk of being run over in their attempts to reach spawning ponds.

The group I joined have, for a number of years, been protecting an intersection where three roads meet beside a large pond. As we gather in high-vis vests at around half five in the evening, it’s already fully dark. We’re wearing latex-free gloves and bearing large white buckets. The pond is swelling up either side of the road, flooding the tree roots in a muddy soup. The rain falls intermittently and, sure enough, a proud collection of male toads is already eagerly lining the roads awaiting the females.

Toads crossing for 800 metres sign on the side of a road with a grassy verge, wildflowers and long grass. — Toads crossing sign in Stalisfield Road by Pam Fray, via geograph.org.

We walk along the lane counting the toads we find and placing markers near them that are more visible for passing cars than the toads themselves are. It’s not such a busy road, but it is narrow and steeply enclosed between old earthen hedgerows that cars and tractors have clipped away over time, resulting in an overhang that the toads are incapable of climbing. Often, they become trapped along the lane. Where we find them in a predicament, we watch to observe the direction of their travel, and if the cars come, we gently lift the toads off the tarmac and place them in the verge where they appear to be headed.

A few drivers who come by slow down and ask what we’re doing. Many seem intrigued by the response, often vowing to take care as they go on. I’m told this is an improvement. As awareness of toad crossings and the work being done to monitor them increases, people are more understanding, though I’m assured there’s still animosity from some drivers who feel inconvenienced.

During some of the evenings on the patrol we encountered beastly weather; driving rain and flooded roads; and I marvelled at the dedication of the volunteers and their care for the amphibians crossing the roads. I learned that more people are approaching Froglife to get involved and that, due to increased awareness and publicity, the plight of toads is reaching more and more would-be patrollers. There have also been successful cases of temporary road closures to divert traffic during the heights of toad migration in the UK this year.

Close up of two toads, one on the back of another, crossing a gravelly road at night. — Toads – Oli Haines

It’s a complex web of challenges that contribute to amphibian population declines – not just nationally but globally. Land-use intensification threatens our waterways with myriad pollutants and our roads and construction projects fragment vital habitats or obliterate them entirely. It’s heartening that awareness is building. It has been such an inspiration to me to learn there’s a network of enthusiastic and caring volunteers out there in the winter nights, working at limiting the damage to amphibian populations, championing these remarkable and charismatic animals, and building hopeful connections in local communities while doing so.

If you feel call to get involved, visit the Froglife website where you can learn more about local toad crossings. There’s also abundant information on ways that you can make any local green spaces or gardens more amphibian friendly, such as making ponds, allowing wilder patches and encouraging greater invertebrate diversity.

Read our two-part Gardening for Wildlife blog for more information.

This week in biodiversity news – 18th March 2024

Climate

The price of bananas is set to rise permanently as a result of climate change, according to experts. This follows a noticeable absence of the much-loved fruit in several UK supermarkets within the past few weeks due to sea storms. Senior economist at the UN’s Food and Agricultural Organisation states that increasing temperatures are compounding the impacts of fast spreading diseases, including the Fusarium Wilt TR4 infection, which continues to pose an enormous threat to supply chains. Once a banana plantation has been infected with the virus, it kills the trees, therefore halting production. The infection is very difficult to eradicate once present. Increases in more extreme weather conditions, such as widescale flooding and strong winds, allow the virus to spread more easily and may be why it has now been detected across four continents.

Ground level image of Redwood Trees with the sun shining on the bark and ferns covering the ground. — Redwoods.jpg by David Wood, via flickr.

The world’s largest species of tree is thriving in the UK due to the moist climate, and now outnumbers those in their native home of California. A study into Giant Redwoods (Sequoiadendron giganteum) has revealed that those imported to the UK around 160 years ago are growing at a similar rate to those in the US. However, as these trees are still young, they are 39% smaller than their American counterparts. Due to their sheer size, it has also been revealed that they store large quantities of carbon dioxide, with those measuring 45m tall in Wakehurst storing between 10-15 tonnes of carbon per tree. Whilst the trees are flourishing in the UK climate, there is little chance of them invading native forests as they require very specific conditions to seed.

Environment

An African project aiming to replace barren lands with wildlife-rich, biodiverse forests has restored more than 41,000 hectares of woodland in ten years. Trees for Future (TREES) is an organisation that aims to restore landscapes in developing communities, while also combating poverty. Following the launch of their mass reforestation campaign in 2015, they have worked with locals to plant tens of millions of trees across nine African countries. They also intend to create 230,000 jobs by 2030 via their ambitious initiative. Working with thousands of smallholder farmers for a duration of four years, they provide training, tools, seeds and grants to allow locals to plant biodiverse woodland and create environments that are self-sustainable for both communities and nature.

Dartmoor sunset taken from behind some rocks looking over Dartmoor's heathland with clouds in the sky and the sun setting behind them. — Dartmoor sunset by Simon Vogt, via flickr.

The government has pledged a £25m scheme to restore critically endangered habitats for England’s fastest-declining wildlife. In light of the recent announcement of the EU’s first nature law to restore 30% of degraded ecosystems by 2030, this government funding will help improve over 3,300 hectares of land, including 49 hectares of wetland around chalk river habitats in south-east England. The ‘species survival fund’ will also support schools, farmers and landowners across mid-Cornwall to ensure woodland, heathland and acidic grassland restoration across the moors, and help to create vital nature corridors across the Medlock Valley, with the collective aim of restoring nature and supporting iconic species such as Water Voles, waxcaps and rare Great-crested Newts.

Science

According to a new study, playing healthy reef sounds through underwater speakers could save damaged coral reefs. Fifty percent of the worlds coral reefs have been lost since the 1950s. However, scientists working in the Caribbean have revealed that simulating healthy coral reef environments through soundscape recordings may be the key to recovery. Working across three reefs, each at different stages of degradation, the team of scientists installed speakers at all three sites, but only played recordings taken from a thriving reef at one: Salt Pond reef. Results showed that, on average, 1.7 times more coral larvae settled there than on the other two sites. The rate of settlement decreased further away from the speakers, suggesting that the sounds played an important role in larval retention. Research is now underway to understand whether other coral species respond in the same way, and to find out whether the corals thrive after settling.

Bulbous green coral in a healthy coral reef with a red pointed fish swimming in the foreground. — More bulbous green coral by Ed Ralph, via flickr.

Pollution

Air pollution levels throughout Europe have continually decreased over the last 20 years, despite increasing threats of climate change. Research conducted by the Barcelona Institute for Global Health studied 1,400 regions across 35 countries and have concluded that the two main forms of overall suspended particulate matter (PM2.5 and PM10) and nitrogen dioxide (NO₂) have been falling annually throughout this period. PM10 has decreased annually by 2.72%, while PM2.5 dropped by 2.45% and NO₂ levels reduced by 1.72%. Even so, according to the WHO, 98% of Europeans are living in areas with unhealthy levels of PM2.5. These tiny pollution particles are known to cause an array of health problems, and are estimated to be linked to over 400,000 premature deaths a year across Europe.

This week in biodiversity news – 4th March 2024

Rediscoveries and Recovery

The Norfolk hawker dragonfly is no longer extinct, with the species set to be taken off the British Red List of endangered species after a large-scale population surge. Since its extinction in the Cambridgeshire Fens in the 1890‘s, the Norfolk Hawker’s small population has been restricted to the Norfolk Broads. However, in recent years they have been found in Kent, Hertfordshire, Sussex, Dorset and Devon due to an increase in suitable habitats across Britain resulting from climate breakdown. This has been the driving force behind the species recovery, however, the gaps in the current population distribution need filling to ensure the Norfolk Hawker’s long-term survival.?

Norfolk Hawker Dragonfly perched on a plant in the sun. — Norfolk Hawker by Jo Garbutt, via flickr.

A breeding population of an incredibly rare species of turtle has been discovered in India. The Cantor’s Giant Softshell Turtle is native to south and south-east Asia and has been classed as critically endangered. The discovery of a breeding female on the banks of the Chandragiri River in Kerala, however, provides hope for this illusive species. The study was led by a group of international conservationists who worked alongside local communities to record the first documentation of a female nest, and subsequently rescue the eggs from flooding. The hatchings have since been released into the river, and the team are now working closely with the local community to set up a hatchery and nursery near the original nesting site.?

Climate

Since 2000, more than a third of Antarctica’s glacier anchors have reduced in size. These anchors, or “pinning points,” are important braking mechanisms that hold the glaciers in place and subsequently reduce the rate of ice detachment from the continent. New research conducted by the University of Edinburgh suggests that an increase in global sea temperatures is causing these points to thin at a much faster rate than previously estimated. Since 2000, 37% of pinning points have either shrunk or completely disappeared, and, as a result, the glacier’s braking force is weakening.?

Amazing shapes and deep blue tumbled down the huge glaciers that lined the shores. — Antarctica 162 – dramatic landscape by McKay Savage, via flickr.

The UK has had the wettest February on record, according to the Met Office. Between December 2023 and January 2024, the UK experienced 90% of the total expected winter rainfall. This increase in wet weather continued throughout February with some areas of the UK seeing two and a half times their normal rainfall for this month alone. These adverse weather conditions, a result of climate change, is having detrimental effects on farmers due to increased crop flooding, with some farms in Lincolnshire having been underwater since October.

Science and Environment

A 12mm long, transparent fish has been found to make a sound as loud as a pneumatic drill. Scientists in Berlin were studying the Danionella cerebrum in their lab when they began hearing strange clicking noises coming from the male fish in the tank. Upon investigation, they discovered that this miniscule species can make a sound of 108 decibels when measured at a distance of one metre away – this is roughly equivalent to the noise made by a bulldozer and is likely to be the volume at which other fish hear the sound. This noise is created by the contraction and release of the fish’s swim bladder, and it is one of the loudest noises ever discovered in a fish of this size.?

Ancient trees play an irreplaceable role in supporting forest life, according to experts. The results from a recent study in the Spanish Pyrenees show that ancient trees no longer exert energy on reproduction, and instead prioritise stress tolerance, durability and slower growth. It has also been revealed that, over time, sections of older trees die and decay, which allows them to host more diverse and greater quantities of different species than younger trees, as juveniles don’t possess the unique physical and physiological features to support them. Although the number of old growth trees continue to decline worldwide, researchers Munne-Bosch and Pasques hope their report will highlight the importance of our ancient trees’ ecological role.?

Old, twisted Silver Birch tree near Owler Tor in the Peak District. — Silver Birch by Steve Batch 61, via flickr.

Policy

The government are expected to announce a move to 100% badger culling under exceptional circumstances in the coming weeks. The current policy on badger culling aims to reduce badger numbers by 70% in each cull area, however the government may increase the target to 100% in certain circumstances, subject to consultation, as of January 2026. The Government had previously stated that the cull would end in 2025 and be replaced by increased badger vaccinations, however some fear that the new 100% cull policy may become standard practice instead.

Parliament has implemented the first EU nature law to restore 30% of the EU’s degraded ecosystems by 2030. This comes into effect after recent findings reveal that over 80% of all European habitats are in poor shape, and aims to ensure the restoration of 60% of these environments by 2040, and 90% by 2050. The EU has pledged that once these ecosystems are restored, they will ensure that the area does not significantly deteriorate once more in a bid to aid the long-term recovery of damaged natural areas.

Author Q&A with Hugh Warwick: Cull of the Wild

In Cull of the Wild, author Hugh Warwick investigates the ethical and practical challenges of managing invasive species to increase biodiversity. He explores the complicated history of species control over time, while also combining scientific theory and subtle humour, to explain the many issues conservationists face when trying to protect native species from their non-native rivals.

Hugh Warwick is an ecologist, conservationist and writer who specialises in the study of hedgehogs. He has published three books focusing on this species, however he recently expanded his field of study to include invasive species while writing Cull of the Wild. He has previously written for BBC Wildlife, New Scientist, The Guardian and The Daily Telegraph, is the spokesperson for the Hedgehog Preservation Society, runs courses on both hedgehog conservation, and lectures in creative writing.

Hugh recently took the time to talk to us about his book, including what inspired him to write Cull of the Wild, how he hopes his book will help future conservation methods, and more.

Firstly, what inspired you to write a book on the culling of invasive species?

The very first independent field work I did in 1986 – for the 3rd year project of my degree – took me to North Ronaldsay. My supervisor had a friend who was both the GP and the bird warden on this island, the most northerly in Orkney. He had noted that there seemed to be a correlation between the increase in number of imported hedgehogs (that was the postman’s fault!) and the decrease in breeding success of ground nesting birds – in particular the Arctic Terns. My work was to try and find out how many hedgehogs there were. This turned out to be around 500 – not the 10,000 the Daily Express had reported! The bird observatory organised an airlift to remove the hedgehogs after I had gone and I returned in 1991 to repeat the survey. Since then I have found the collision of ecological study with human concerns really fascinating.

This led me to become involved, rather inevitably, in the Uist hedgehog saga, where the RSPB and Nature Scotland were killing the hedgehogs for the very same reason they had been airlifted from North Ronaldsay. I quickly shifted from reporting on the story for BBC Radio 4, to joining the campaign against the cull, and then doing the research that helped stop it. But while all this was happening, I met a researcher from New Zealand who was telling me that they were killing hedgehogs over there (in the 1860s we sent a load of hogs over to help the colonialists feel more at home) I could see no reason not to kill those hedgehogs.

That apparent contradiction has been spinning in my head ever since and was the springboard for this book.

Close up photograph of a New Zealand Hedgehog walking through long grass. — New Zealand: Hedgehog, by Eli Duke via flickr.

How did you find researching such differing opinions on the subject, and have your preconceived opinions changed over the course of writing this book?

I found this book so very different from all the others I have written. Previous outings have always been with people who are just really pleased to talk – to share their enthusiasm for Beavers or Water Voles or owls. This was the first time where I felt like the initial communication was almost like a job interview – assessing whether I was suitable to talk to. Some people simply refused to talk, others were cagey. I guess I was quite naïve!

The journey of the book is basically one where my head and my heart are in constant debate. I lay out my ‘bunny-hugging’ prejudices at the start. I suppose I was hoping to find that all instances where animals were being killed could be dealt with in other ways.

One of the biggest lessons I learnt, though, was about how people, even ones with whom you have fundamental differences of opinion, share so much common ground. But you will never see that common ground if you charge in at the difference! I love that one of my potentially conflicting interviews ended up with the biggest argument being over who recorded the best version of Sibelius’ 5th Symphony!

In Chapter 1, you discussed that animals are shown to be continually developing to become more like humans – problem solving, making and using tools etc. Do you think this gradual form of humanisation may lead to more equal ‘rights’ between animal species and humans in relation to killing for conservation?

I would not look at this as humanisation – that is slipping back into the human exceptionalism that got us into this mess. Currently the degrees of cruelty we deliver to wildlife is arbitrary, based in large part on language and on the names we give them, even different members of the same species.

We need to recognise that these animals being killed experience pain, joy, fear and hope. If the realisation that different species have the capacity to do human-like things is enough to get this recognised, then that is some progress.

I have been gently eased away from the concept of ‘rights’ for animals and towards a desire to see cruelty minimised. Rights are important and I see their value – but here, I feel the best outcomes will emerge from a utilitarian desire to maximise good and minimise bad. Though that requires we have the idea that these animals, most of whom are simply in the wrong place at the wrong time, are individuals and can suffer.

A close up of a Red Squirrel stood on its hind legs on a rock eating a nut it's holding in it's front paws. — Red Squirrel, by Caroline Legg via flickr.

You must have visited many places and spoken to many different people about different species while you were writing this book. Were there any particularly memorable moments or experiences that that have stayed with you?

I did not get to some of the places in this book – time, Covid, money and a desire to minimise flying all conspired to keep the exotic interviews on Zoom. But the adventures I did have were all special.

Heading out along the coastline of South Ronaldsay, Orkney, with Spud – the most handsome labrador I have ever met – was magical. The wind blew, the surf crumped in from the Atlantic, and Spud, well, he followed his nose and we followed him as he tracked down evidence of Stoats.

The Stoat story is so important – it is about speed and trying catch this problem early – they were only found in 2011. But more than the practical, it is also about the buy-in of the local population. If the public are not onside, the conservationists can give up now. So it is about education and communication as much as it is about deciding which traps to use and where to site them.

A close up of a stoat climbing over a dark, wet, mossy log. — Stoat (Mustela erminsea) by big-ashb, via flickr.

In what way do you hope that Cull of the Wild will help future animal conservation efforts?

The overarching message I hope people get from Cull of the Wild is that ecology is both fascinating and VERY challenging when it is part of a conflict. Ecology is not given the level of respect that it should receive. It is always sidelined – economics and politics hog the headlines – yet both of those are but subsets of the wider ecosystem. Without a healthy ecosystem we are on a downward slope to disaster. So, I hope that people will read this book, maybe because they are outraged at the killing, and will then come away realising that ecology is very complex and should be treated with great respect.

I also hope that this book will convince people who hold very firm opinions – opinions that are often amplified by the bubbles in which we tend to linger – that people with differing views may well share many of the same values as themselves. And that to begin discussion at the common ground is the foundation of progress. Argument should not be about winning, but about making things better. Remember, it is quite possible that some of the things you know are wrong. A friend of mine turned up at a conference recently with a t-shirt saying ‘Don’t believe everything you think’. We should be humble enough to recognise we might be wrong.

Are you currently working on any other projects that you can tell us about?

As I write this, the lovely people at the publishers Graffeg are hoping I will stop promoting Cull of the Wild and finish the two books I owe them: one on bats and the other on nocturnal nature. I have another narrative nonfiction brewing – about as different to this book as imaginable. Something which will hopefully bring laughter into our love of nature.

Cull of the Wild is available to order from our online bookstore.

Author Q&A with Chantal Lyons: Groundbreakers

Big, messy and mysterious – crossing paths with a Wild Boar can conjure fear and joy in equal measure. In Groundbreakers, Chantal Lyons gets up close and personal with this complex and intelligent species in the Forest of Dean, and investigates the people across Britain and beyond who celebrate the presence of these animals – or want them gone. From Toulouse and Barcelona where they are growing in number and boldness, to the woods of Kent and Sussex where they are fading away, to Inverness-shire where rewilders welcome them, join Chantal on a journey of discovery as she reveals what it might take for us to coexist with the magnificent Wild Boar.

Chantal Lyons is a naturalist, writer and science communicator. Having grown up in the tidy countryside of Kent, her encounters with the growing rewilding movement opened her eyes to the potential for restoring nature in Britain, and inspired her to study the relations between people and Wild Boar in the Forest of Dean. She currently lives in Cheltenham, never too far from the boar.

Chantal recently took time out of her busy schedule to tell us about her first experience with a Wild Boar, her hopes and fears for the future of their populations in Britain, and more.

First of all, could you tell us a little bit about yourself and what led you to writing a book about Wild Boar in Britain?

Up until my mid-twenties I spent all my writing time churning out unpublishable fantasy and sci-fi novels, alongside a zig-zagging career in the charity sector. The journey to Groundbreakers was perhaps a ponderous one – it started when I went to the Forest of Dean in summer 2014 to research a Masters dissertation in environmental social science. The Forest of Dean was, and still is, one of the few places in the country where Wild Boar have returned since their extirpation from Britain around 700 years ago. I wanted to find out from local residents what it was like to suddenly find yourself living alongside a big, wild, and utterly unfamiliar creature. What I discovered from those interviews astounded me, and I was sure that some established nature writer would soon publish a book about the return of boar to Britain and what this meant for us. No one did. After seven years, I decided to send off a proposal to a publisher who I’d encountered on Twitter, and it snowballed from there.

Could you tell us about your first real life experience with a Wild Boar?

It was a long time in coming! While I was in the Forest of Dean doing the Masters research, I used every spare moment to explore the woods on my own, often following locals’ leads. It always came to nothing. The boar seem to be like cats – you seem to be more likely to meet them the less you want to. But eventually, at the tail end of summer, I went to a spot where I’d heard from someone that a sounder (a family group of boar, which is always led by a matriarch) had been foraging each evening. I heard them softly calling to each other, then there was a rustling in the bracken, and an adult stepped out onto the path to get a look at me. We stared at each other for about two seconds, she gave a belching alarm call, and then she vanished with her family.

Wild boar and 7 piglets lead down on a rocky bank in the Yorkshire Dales. — Wild boar at Bolton Castle in Yorkshire Dales National Park, by HarshLight via flickr.

I appreciated the ways in which you speak about rewilding, in particular the importance of nuance and accepting the unknown. Do you think that uncertainties about the best way to undergo reintroduction projects and their expected outcomes are a significant hindrance to their implementation?

I have heard many a time from rewilding practitioners that the inherent uncertainties in rewilding can make it especially challenging to gain funding, given that projects aimed at restoring nature have traditionally been expected to be able to set clear targets and end-goals. But beyond practicalities like money, I think the bigger challenge is the attitude that reintroducing species for rewilding purposes is too big an unknown, and therefore too big a risk. Of course we should aim to conduct as much scientific research and gather as much knowledge as possible, but we are running out of time to reverse the haemorrhaging of our biodiversity in Britain and globally. To me, it beggars belief that we seem quite happy to continue doing all kinds of things that we know are massively damaging the environment, but reintroducing species? Why, that’s a step too far!

Close up image of two wild boar walking through mud with their snouts and feet covered in wet mud. — Wild boar, by Marieke IJsendoorn-Kuijpers, via flickr.

One part of the book that particularly resonated with me was in ‘The Risks of Being Alive’ where you speak about how, for most modern humans, ‘nothing matters more in life than eliminating all risk to it – even at the cost of happiness’. What do you think it would take for humans to accept more wildness into their lives?

Maybe it’s a cliché to say this, but I think it hugely helps to engage children with nature from a young age, and to continue doing so as they grow up. That of course means ensuring that everyone can access nature.

Beyond that, the question of how to convince people to accept more wildness is an incredibly tricky one, especially in a place like Britain which suffers so badly from ‘ecological tidiness disorder’ (as Benedict Macdonald puts it in Rebirding). The problem is that most of us have not made the connection between our tidy sterilised surroundings and the loss of nature. There is a lack of understanding that the majestically bare plains of Dartmoor or our rolling green fields mean an absence of life; and that you need all manner of species, including big ones, to ensure healthy ecosystems. I didn’t realise this for years. But once you know, you can’t stop wanting to bang the drum.

What are your biggest hopes and worst fears for the future of Wild Boar populations in Britain?

I want the planned, country-wide reintroduction of Wild Boar to become accepted both politically and societally. In the meantime, I hope that the few boar we do have are allowed to thrive. That means more oversight of people carrying out legal shooting of them on their land, and – in the case of the Forest of Dean population – better censusing methods to ensure they are not over-culled (though some culling will always be needed, as the boar currently lack other predators).

What am I most afraid of? That very soon, a disease called African Swine Fever (ASF) which burns through pig populations like wildfire will make its way into Britain. Since Brexit, border controls on pork imports have been so lax that experts think it’s only a matter of time before ASF reaches us. Forestry England is primed to wipe out every last boar in the Forest of Dean if the disease is ever detected in the population. And once they’re gone, it seems very unlikely that they would ever be reintroduced (legally or illegally) again. We will miss a miraculous chance to kickstart the landscape-scale restoration of nature in Britain.

Wild Boar piglets running across the road in a national park park with the sun out. — Wild Boar Sus Scrofa, by Björn, via flickr.

Finally, what is occupying your time at the moment? Are there plans for further books in the pipeline?

I work full-time as a science communicator, which does narrow my research and writing windows! But I am currently working on a proposal for book number two. It’s intended to be something of an evolution of Groundbreakers, picking up a thread that often emerged during my research interviews with people, but which I couldn’t possibly have fitted into this first book…

Groundbreakers is available from our online bookstore.

Author Q&A with Robert Wolton: Hedges

In Hedges, Robert Wolton brings together decades of research and personal experiences from his farm in Devon to explore the ecology, biology, nature conservation and wider environmental values of the hedges in the British Isles. Containing over 300 photographs and figures, this latest addition to the British Wildlife Collection offers a detailed commentary on hedges and their importance in our landscape.

Robert is an ecological consultant and writer specialising in the management of farmland and associated habitats for wildlife. He is a former hedgerow specialist for Natural England, the founder, chair, editor and lead author of the Devon Hedge Group, has been involved in Hedgelink since it began, and has written a number of reports and articles specialising in hedges.

Firstly, can you tell us a little bit about yourself and how you came to be contributing to the British Wildlife Collection with a book on hedges?

I’ve had a life-long interest in natural history, even as a schoolboy I was a very keen birdwatcher. Later, at university, I trained as a zoologist with a strong interest in mammals, although subsequently I have been more involved with insects, especially moths and flies. It was perhaps inevitable that I should pursue a career in nature conservation. My passion for hedges was awakened when we bought a small farm in the heart of Devon, my wife, Paula, looking after the cattle and sheep while I went to the office. Initially it was the flower-filled meadows that drew me to the land, but I soon realised that the many thick hedges, full of different trees and shrubs, were glorious and just as special, particularly when I discovered that those small spherical nests I kept finding were made by Hazel Dormice. At that time, 30 years ago, hedges were very under-appreciated in the nature conservation world – there was a gap waiting to be filled and I was able to persuade my bosses in English Nature to allow me to become a part-time national hedge specialist, a role I continued to fill after the organisation morphed into Natural England. Partial retirement gave me the opportunity to write a book on my beloved hedges. I’d always dreamt of having a volume in the British Wildlife Collection, much admiring the series, so when Bloomsbury offered me the chance I jumped at it.

Robert Wolton, author of Hedges, photographed stood by a large pile of thin trees being used to construct a man-made hedge. — Robert Wolton making a hedge.

I tend to think of hedges as being man-made. But is there such a thing as a natural hedge? And if so, how do these come about?

Most hedges in Britain and Ireland are indeed man-made. Some, though, have grown up naturally along fence lines and ditches – these are termed spontaneous hedges and I think they are becoming more frequent, especially along the sides of roads and railway lines. Trees and shrubs, their seeds carried by wind, birds and mammals, can colonise strips of rough grassland remarkably quickly, often protected to begin with by brambles. It does not take many years before there’s at least a proto-hedge present, and after a decade or two it may be difficult to tell it was not planted. Another way hedges have come into being is through strips of woodland being left when land is cleared for agriculture. These are called ghost hedges. Their origin is often given away by the presence of unexpectedly high numbers of trees and herbs characteristic of ancient woodland because they have poor dispersal abilities.

I particularly enjoyed the chapter in your book on the origins and history of hedges. Do you think that the study of hedges can give us an insight into the natural and social history of our country?

Without a doubt. Throughout our countryside, away from the open moors and fens, the pattern of fields, as defined by hedges and sometimes drystone walls, allows the history of the landscape to be read, often going back centuries, even sometimes millennia. We are so fortunate in these islands still to have this landscape continuity – it has been lost over much of continental Europe. In places like Dartmoor, which I can see from our farm, layer upon layer of history can be unpicked through studying the networks of field boundaries, most of which are banked hedges. Some can be traced back to the Bronze Age, 3,500 years ago. This may be exceptional, but even so, most of the hedges in Britain, and many in Ireland, probably date back to Medieval times. They are a hugely important part of our cultural heritage. We love our hedges. This is evident not just in the countryside, but across our villages, towns and cities, in our gardens and parks. Hedge topiary is, after all, a national pastime!

Farmland hedge leading towards a forest at the end of a farm track along the right-hand side of a field. — Hedge, by Damien Walmsley via Flickr.

As you describe early on in the book, there are many different types of hedge, from those that consist of just a single species to very diverse multi-species ones, even ones that have been allowed to mature into lines of trees. Is there a type of hedge that is best for the surrounding wildlife and environment and that we should be trying to replicate or maintain as much as possible?

If you put me on the spot, I’ll answer this question by saying that thick, dense, bushy hedges are the best for wildlife, preferably with margins full of tussocky grasses and wildflowers. But really we should be thinking about what networks of hedges look like, because there’s no such thing as a perfect hedge. Different birds, mammals and insects like different conditions, and in any case you can’t keep a hedge in the same state for ever, however carefully you manage it. Basically, the trees and shrubs are always trying to reach maturity, and as they do so gaps develops beneath their canopies and between them. That’s when laying or coppicing are needed, to rejuvenate the hedge and make it more dense and bushy. A lot more research needs to be done on this, but probably, from a wildlife point of view, at least half of all the hedges in a network, say that covering a decent-sized farm, should be in this condition. On the other hand, from a climate perspective, where we need to capture as much carbon as quickly as possible, tall hedges with many mature trees are best. You can see there are tensions here, all part of the challenge of managing hedges well. Who said it was easy?

A dusty track running in a straight line with hedges on both sides and tall, narrow, straight trees behind the left hand hedge. — Into the Distance, by Dave S via Flickr.

As both a farmer and an ecologist, I’m sure you are more attuned than many to the conflicting needs of making a living from the land and managing hedges for the benefit of wildlife and conservation. Do you think financial incentives are the only way to encourage landowners and farmers to both plant more and maintain existing hedges?

Financial incentives like government grants will always be important to landowners and farmers because good hedges benefit society at large just as much as those who own and manage them. Things like plentiful wildlife, carbon capture, reduced risk of homes flooding and beautiful landscapes rarely bring in any income to offset costs, let alone profit – it is right that they are supported from the public purse.

Still, hedges can be of direct financial value to farmers through serving as living fences, preventing the loss of soil or providing logs and wood chips for heating. They can also increase crop yields through boosting numbers of pollinators and the predators of pests. To some extent, these direct benefits to farm businesses have been forgotten in recent decades in the drive for increased food production regardless of environmental cost, but they are now being appreciated much more as new ways of working the land, such as regenerative farming, catch on.

And we should not overlook the fact that more and more landowners and farmers are prepared to bear at least some of the costs of good hedge management simply because they gain huge satisfaction from healthy hedges and all the wildlife they contain. The pleasure of seeing a covey of Partridges or a charm of Goldfinches, or hearing the purring song of the Turtle Dove, cannot be priced.

A narrow, windy track going through a high sided hedge into the distance in a circle. — by Oli Haines.

Finally, how did you find the experience of writing this book, and will there be other publications from you on the horizon?

This is my first ‘big’ book, and I was apprehensive to say the least when I started writing it, in 2022. But with a lot of encouragement from my wife and friends I soon got into the swing of things. Challenging for sure but personally most rewarding – exploring new facets, checking information and trying to find the best way to pass on my enthusiasm for the subject. Above all, it felt good to share knowledge collected over many years. Bloomsbury’s support was invaluable, there’s no way I could have self-published. As to whether there are more books in me, I’m not sure. Perhaps one on hedges in gardens? There again, I have a passion for wet woodland, another habitat that’s been much neglected. It’s all too soon to say.

Hedges is available to order from our bookstore.