Ospreys are being reintroduced to Ireland, more than 200 years after they were declared extinct. The species has not bred in Ireland since the 1700s but, after years of lobbying, the National Parks and Wildlife Service has agreed to reintroduce Osprey this year. A report from last year showed that 25% of Irish birds are in severe decline, with 37% more showing moderate decline. There are now calls to reintroduce more birds that are now extinct in Ireland.
People are being warned to leave capercailies alone, as this endangered bird stops breeding when disturbed. This species, whose Scottish population consists of only 542 individuals, is on the brink of extinction. It is a criminal offence to disturb capercallie while they are lekking (where males gather to display and fight for the attention of females), nesting or raising young. A birdwatcher was even arrested and charged last year for disturbing them.
Climate change
The hot, dry summer of 2022 has had a major impact on some UK butterfly species. The new study was conducted by Butterfly Conservation, the UK Centre for Ecology & Hydrology, British Trust for Ornithology and Joint Nature Conservation Committee. It showed that species such as the green-veined white, small white, small tortoiseshell, peacock and brimstone experienced greatly reduced numbers following the widespread drought. This is thought to be due to insufficient food for the caterpillars as food plants withered and died in the drought conditions.
The net zero strategy shows that the UK will miss its 2030 emissions cuts targets. According to the government, its policies will only achieve 92% of cuts required, but experts think that is a ‘very generous reading’. The UK has a legally binding requirement to reach net zero emissions by 2050, and it commited under the Paris agreement to cut emissions by 68% by 2030 (compared with 1990 levels). The new strategy is a mix of wins and losses: it requires car manufacturers to ensure 22% of their car sales and 10% of van sales must be of electric vehicles by 2024, but does not lift the ban on onshore windfarms and contains little reference to agriculture.
Policy
A new multi-million pound grant scheme has been launched by Natural England to help rare and threatened species, such as water voles, curlews and natterjack toads. The Species Recovery Programme Capital Grant Scheme will provide projects with £18 million over two years, delivering targeted conservation action through the creation and improvement of specific wildlife habitats, conservation translocation, research and creating solutions to address species decline.
Scientists have found the deepest fish ever recorded at 8,300 metres in the Izu-Ogasawara trench near Japan. A team made up of researchers from Western Australia and Tokyo captured footage of the animal, an unknown snailfish species belonging to the genus Pseudoliparis. Two other snailfish, Pseudoliparis belyaevi, were also filmed at a depth of 8,022m. At this depth, the pressure is 800 times greater than at the surface; snailfish are adapted to live at these high pressures by not having swim bladders and they have a gelatinous layer instead of scales.
A newly described leafless orchid in Sri Lanka has been named. The species was found in a lowland wet zone forest and has been named Gastrodia pushparaga, after a precious yellow sapphire commonly extracted from the same district. This is the third Gestrodia species found in Sri Lanka, the other two being discovered in 1906 and 2020.
The High Seas Treaty is a new agreement signed by the UN which aims to put 30% of international waters into marine protected areas (MPAs) by 2030. International waters are two-thirds of the world’s ocean, established under the 1982 UN Convention on the Law of the Sea, where all countries have a right to fish, ship and conduct research. Currently, only 1.2% of these areas are protected, leaving the rest open to exploitation from a wide variety of threats.
What are the current threats to the world’s oceans?
There are a number of key threats to the health of our oceans. A recent assessment by the International Union for Conservation of Nature (IUCN) found that nearly 10% of marine species are at risk of extinction. Overfishing and pollution are the two biggest threats, according to the Nigerian Institute for Oceanography and Marine Research. The number of overfished stocks has tripled globally in the last 50 years and, according to the Food and Agriculture Organization of the United Nations, one-third of the world’s assessed fisheries are being pushed beyond biological limits. Illegal fishing, under-researched, unbacked or unregulated fishing quotas, and bycatch all combine to create a major threat to global marine ecosystems.
Around 4 million fishing vessels are currently in operation around the globe. Poor government management and control of fisheries and trade, along with subsidies provided by many governments to offset business costs and a criminal fishing network worth around $36.4 billion annually, are all serving to drive overfishing. This leads to degraded ecosystems, changes in biotic factors such as abundance, average fish size, reproduction strategies and speed of maturation, leading to imbalances between predator and prey dynamics that can erode food webs.
Commercial fishing boat. Image by Gary Leavens via Flickr
While plastic pollution is often the most discussed type of marine pollution, there are actually a broad number of sources, including chemicals and excess nutrients from agricultural runoff, industrial wastewater and sewage, oil spills, ocean acidification and other non-biodegradable waste. They can be broadly grouped into two categories: chemicals and trash. Chemical pollution creates negative effects on the marine environment by changing the chemical state of the ocean, artificially increasing nutrient levels which can lead to toxic algal blooms and impacting the physiology of marine life by reducing their capacity to reproduce, reducing offspring fitness, impacting growth or increasing their vulnerability to parasites and diseases. Marine trash can cause entanglement or be consumed, which can impact the health of marine life and even become fatal.
Other threats include those from shipping traffic, such as noise and collisions, climate change, deep-sea drilling or mining, weapons testing and sonar. Climate change impacts the oceans in a variety of complex ways, from sea level rises changing the abiotic factors of many habitats, temperature rises causing marine heat waves, more frequent and intense storms, and changes in oxygen and carbon dioxide levels leading to anoxic water and ocean acidification. Shipping noise, mining, weapons testing and sonar produce high levels of sound waves in the ocean, disrupting marine communication and impacting the behaviour of species such as whales, causing them to travel miles away and even beaching themselves to avoid the disturbance. All these stressors impact marine life, leading to mass mortality events and threatening ecosystems.
Whale strandings can occur due to a variety of causes, one being excessive noise pollution. Image of a mass pilot whale stranding by Oregon State University via Flickr.
What is the plan?
The talks, called the Intergovernmental Conference on Marine Biodiversity of Areas Beyond National Jurisdiction, have now reached an agreement on the legal framework after almost 20 years. One of the main elements of this treaty is the aim to create international MPAs, restricting industrial fishing, deep-sea mining and other potentially destructive activities. Another part of the treaty looks to reassess environmental impact assessments, creating consistent ground rules that all nations will need to follow when calculating the potential damage of human activities in these areas. It would also open up the sharing of genetic resources from international waters, which has both scientific and commercial benefits.
Will this be effective?
More than 100 countries are part of this agreement. While the treaty has been agreed upon, it is not yet been ‘legally agreed’, meaning that the treaty must first be formally adopted and then be passed legally into all the countries that have signed up. Effective implementation is crucial, as if all countries do not abide by the new treaty, it will not have the full impacts that are desired. Talks have previously been held up due to a number of disagreements over fishing rights and funding.
For MPAs to be effective, they need to be properly regulated and enforced. This means that fishing quotas must be backed by thorough research, catch numbers need to be reported accurately and illegal fishing must be controlled. Many existing MPAs fail to protect marine biodiversity and keep fishing to sustainable levels, according to a report by the European court of auditors. A study even found that 59% of the MPAs in Europe were being trawled by commercial vessels more often than in areas without protection. Therefore, without proper and rigorous regulation, these areas will simply provide a false sense of security without any actual progress in conserving and restoring our marine biodiversity.
Over 80% of marine polution comes from land-based activities. Image by Ravi Khemka via Flickr.
Additionally, while creating MPAs that would regulate fishing, shipping routes and research such as deep-sea mining, it does not protect from the other threats to marine health. Over 80% of marine pollution comes from land-based activities, therefore these new MPAs will continue to be threatened by pollution. They will also still be threatened by the impacts of climate change, although intact ecosystems are much more resilient to these stressors than degraded ones. Therefore, if these new MPAs can repair biodiversity in these areas, some of the effects of these threats could be at least partially mitigated.
To aid the approval of the treaty and its early implementation, the EU pledged €40m (£35m). The continued success of this, however, requires continued funding. This is why countries will still be allowed to profit from marine genetic resources, as a proportion of this will need to be placed into a global fund. High-income countries may be asked to contribute more, and the fund will need to be regulated to make sure the correct contributions are being made and that funds are being used effectively and fairly.
Summary
This new UN treaty will place 30% of international waters into Marine Protected Areas by 2030, restricting fishing, mining and other destructive marine activities.
The marine ecosystem is under threat from a variety of sources, including pollution, overfishing and climate change.
The MPAs will need to be properly regulated. This treaty will not protect the areas from all threats but, if the ecosystems become more intact and stable, this will help to mitigate some of the impacts.
Funding will need to be continuous and used fairly and effectively for this treaty to be successfully implemented.
An invasive snail is helping an endangered bird in Florida. The snail kite is bouncing back from the threat of extinction, due to the abundance of a new food source. Their original food source, a local apple snail, suffered severe declines due to droughts in the early 2000s. This new non-native island apple snail is five times bigger than the original species; continued monitoring of the snail kite has shown that their bills are getting bigger to accommodate this larger food source.
The Yangtze finless porpoise population has increased for the first time. The latest census conducted by the Chinese Ministry of Agriculture and Rural Affairs shows that the population has increased by over 23 percent in the past five years, from 1,012 to 1,249. This is seen as evidence that the conservation effort for the world’s only freshwater porpoise is effective.
Humans are altering the diet of the Tasmanian devil. Human-modified landscapes may be narrowing the diet of this species and accelerating their decline, according to a new study. Devils living in human-impacted areas, such as cleared land, fed on mainly medium-sized mammals. However, in undisturbed habitats, their diet was broader, including smaller animals such as birds.
There is a drought risk to multiple English regions after a dry February. England had its driest February for 30 years, with some rivers at their lowest on record. Scientists are warning that South West England and East Anglia are at risk of drought unless ‘unseasonably sustained rainfall’ occurs in the coming months.
Global fresh water demand will outstrip supply by 40% by 2030, according to experts. The new report calls for governments to stop subsidising the extraction and overuse of water, and for industries from mining to manufacturing to overhaul any wasteful practices. The report has set out seven key recommendations, including scaling up investment in water management and pricing water properly.
Scientists have delivered the ‘final warning’ on the climate crisis. The final part of the sixth assessment report by the Intergovernmental Panel on Climate Change (IPCC) was set out on Monday. This comprehensive review of the knowledge of the climate crisis took eight years to compile and has one clear message: act now, or it will be too late. The report, called the synthesis report, will most likely be the last assessment while the world has a chance of limiting global temperature rises to 1.5°C.
Policy
Ecological emergency has been declared by councillors in South Tyneside, UK. This is part of efforts to boost the biodiversity in the borough, while also safeguarding the natural environment. This declaration has set out 11 pledges which will increase ‘eco-literacy’, develop ‘member champions’ for biodiversity and ensure that council strategic decisions and policies will consider and maximise nature recovery.
Biodiversity Net Gain (BNG) is a new scheme from the government which requires that all new developments improve the natural environment rather than degrade it. From November 2023 onwards, new developments must make sure that the habitat for wildlife is in a better position than it was before the development.
The developer must try to avoid any loss of habitat in the land that is being developed. If this is not possible, additional habitat must be created, either on-site or off-site; at an alternative area that the developer owns, by purchasing units from a land manager or by buying statutory credits from the government. A combination of all three options can be used to make up BNG, but approval from local planning authorities must be gained.
Who will be affected by this new scheme?
The main people who will be impacted by this new scheme are:
Land managers
Developers/construction
Local Planning Authorities
Ecologists
If you own or manage land in England, you can get paid by selling biodiversity units to developers. Currently, the new scheme will only cover England, although existing regulation in Wales requires developments to provide a net benefit for biodiversity. Within Scotland, the 2019 Planning Act requires developments to provide positive impacts for biodiversity.
How much gain is needed?
Under the Environment Act 2021, all new developments need to deliver at least a 10% net gain, with the habitats needing to be secure for at least 30 years. These areas must be either delivered on-site, off-site or via the new statutory biodiversity credits scheme. A national register will hold records and information of all net gain delivery sites.
How is this measured?
An area will be assessed based on its value to nature so that developers or land managers can understand the biodiversity value of a site. The biodiversity metric can be used to assess the value of the land, demonstrate biodiversity gains or losses, measure direct impacts on biodiversity and compare proposals for creating or enhancing habitats on- or off-site. Creating a consistent approach to biodiversity assessment will help planning authorities and communities to better understand the impacts that development can have on the natural environment and to provide the necessary monitoring to ensure that environmental improvements and mitigations for habitat loss are effective.
The metric will calculate the value of a site as ‘biodiversity units’, which are based on the size of the habitat, its quality or condition and location, including whether the sites are in locations identified as local nature priorities. For example, each habitat condition is assessed based on certain criteria, including essential criteria that must be met to achieve a good condition score. The condition is then scored as either poor, moderate or good. Other factors that affect the biodiversity value include how connected the habitat is with other areas and the rarity or diversity of the habitat and the species found in it.
There have been multiple versions of the biodiversity metric, starting in 2012 when the first metric was piloted. With each new version, changes have been made based on suggestions put forward by experts. Currently, biodiversity metric 3.1 is being used, but the government is advising that a future biodiversity metric 4.0 will be Defra’s standard from November 2023. The calculation tools and user guides can be found on Natural England’s Access to Evidence website.
Once the values are obtained, the developers must deliver a biodiversity gain plan, setting out how the development will deliver this net gain and allowing planning authorities to assess whether the proposals meet objectives. The plan should cover:
how any adverse impacts on habitats will be minimised,
the biodiversity value of the onsite habitat pre- and post-development,
the biodiversity value of any offsite habitat,
if any statutory biodiversity credits will need to be purchased,
any further requirements set out in other legislations.
The UK has lost 90% of its wetland habitats. Image by Stephen Gidley via Flickr.
How will this impact the environment in England?
Development, land-use change and urban expansions are among the leading causes of biodiversity loss. The UK is one of the most depleted countries, having lost nearly half of our biodiversity since the 1970s. We are ranked in the worst 10% globally for biodiversity intactness. Overall, 41% of species in the UK have declined, with 26% of mammals at risk of extinction. We’ve lost 97% of our meadows, 90% of our wetlands and 80% of lowland heathlands. A scheme where development will no longer lead to biodiversity loss, but instead to net gain, is a step in the right direction to preventing further loss and helping to begin repairing our degraded environment.
Replacing any established habitats with new ones, however, will have a temporary negative impact on the environment, as newly created habitats can take years to be properly established. This would mean a short-term loss in biodiversity which may have serious consequences for vulnerable species. This is essentially the same issue with COP26’s Declaration on Forest and Land Use, which does not actually forbid the cutting down of forests, but rather aims to end net deforestation, with forest loss being replaced “sustainably”. However, replacing primary or old-growth forests with new growth has serious negative environmental consequences, as the highly complex ecosystems supported by old-growth forests have an irreplaceable value.
There is hope, however, as the Environment Act includes provisions which will exempt irreplaceable habitats from the BNG requirement, as the National Planning Policy Framework states that “development resulting in the loss or deterioration of irreplaceable habitats…should be refused, unless there are wholly exceptional reasons and a suitable compensation strategy exists”. This, therefore, will prevent the new scheme from weakening existing protection for these irreplaceable habitats such as ancient woodlands.
Ancient woodlands, areas of woodland that have persisted since 1600 (1750 in Scotland), only make up 2.5% of the UK. Image by ines s. via Flickr.
Most important, however, is the need for accurate monitoring to ensure that the pre- and post-development biodiversity values are accurate. A recent report has shown that HS2 Ltd has been undervaluing existing nature and overvaluing its compensation measures, with biodiversity loss from Phase 1 of HS2 being at least 7.9 times higher than calculated, and loss caused by Phase 2a 3.6 times higher. The report found that habitats such as watercourses, ponds and trees had been completely missed out from the data and habitats such as well-established tree-lined and species-rich hedgerows have been valued lower than the new hedgerows HS2 Ltd is planning to plant. Inaccurate reporting will undermine the main aim of the BNG scheme, reducing its effectiveness and continuing the degradation of biodiversity in England.
What are the barriers?
There are several issues which may impact the successful implementation of this new method. The first is a lack of resources within local authorities. All new biodiversity gain plans must be approved by local authorities to make sure they are accurate and meet the correct objectives, therefore there must be someone with ecological expertise within the local planning authorities who can review applications and oversee the delivery of these plans. Additionally, local planning authorities may not be able to identify and set up off-site compensation measures needed if a net gain cannot be produced on-site.
Additionally, a lack of clear information, awareness or training for developers, land owners/managers, planning authorities and farmers is another barrier to the success of this method. If those involved are not given access to the correct training, it is unlikely that BNG will be implemented successfully, delaying developments and putting our environment at continued risk. A further issue includes cost implications, as delivering BNG will involve an extra cost that will need to either be absorbed by developers or passed onto customers. However, the scheme will open a new market for landowners, helping to provide environmentally positive incomes.
There has also been criticism about how the previous iterations of the biodiversity metric classified habitats. Scrubby landscapes, such as those dominated by bramble and ragwort, were classed as a sign of degradation, despite them being key features of many rewilding projects. Certain plants, such as docks, were considered ‘undesirable’ despite being a key food plant for many insect species. Due to these classifications, these areas might not be properly compensated for, meaning that the net gains planning would be inaccurate.
Ragwort, fed on by a cinnabar moth caterpillar. Image by caroline legg via Flickr.
Summary
From November 2023, all new developments must deliver a 10% biodiversity net gain, either through on- or off-site plans or by purchasing statutory credits.
The biodiversity value of the habitats on the development site must be determined using the Biodiversity Metric 4.0, which should be released in Spring 2023.
This scheme will help to reduce biodiversity loss and begin to repair the environment in England, but only if it is properly implemented and enforced.
A lack of funding, awareness and training could be barriers to the successful implementation of this scheme. Other issues such as additional costs and poor habitat classifications are also risks to success.
Australia plans to make an area the size of Germany into a marine park in the Southern Ocean. The area around the Macquarie Island will strengthen the protections currently in place, helping to manage the important ecosystem for millions of seabirds, seals and penguins. The proposal will be open for public consultation, with the plan allowing for the continuation of the small Patagonian toothfish fishery. The expansion of the marine park will increase the amount of protected area in Australia’s oceans to 48.2%.
A historic ocean treaty has been agreed upon after a decade of talks. The High Seas Treaty will protect 30% of international waters by 2030. Currently, only 1.2% of these waters are protected, yet all countries have a right to fish, ship and do research in international waters. The new treaty will establish marine protected areas in international waters limiting how much fishing can take place, as well as restrictions on shipping lane routes and activities such as deep-sea mining.
Climate change
Rising sea temperatures have caused sea urchin populations to plummet in West Australia. A number of molluscs and sea urchins on Rottnest Island have seen declines in numbers of up to 90% between 2007 and 2021. Researchers from Curtin University believe rising sea temperatures are to blame. Rader Reef and Cape Vlamingh are designated as sanctuary zones, with the highest level of protection from human activity, but this still isn’t enough to protect against the catastrophic decline in biodiversity.
A newly described snake is being threatened by mining in Ecuador and Panama. The DiCaprio’s snake is one of five new species of snail-eating snakes from the upper Amazon Rainforest in Ecuador and the Choco-Darien forests of Panama. Both areas have seen an increase in illegal gold mining along rivers and streams during the COVID-19 pandemic which, along with deforestation, is threatening a number of species in these habitats.
Researchers have found 26 Australian species that have recovered from the brink of extinction. They reviewed all the animals that have been listed as threatened under Australia’s Environment Protection and Biodiversity Conservation Act between 2000 and 2022 and discovered that 15 mammals, eight birds, four frogs and one fish no longer met the criteria to be listed as threatened under the Act. This number includes three that had been legitimately delisted during this time. The researchers attributed this recovery to targeted management. However, far more species have become threatened than recovered over the past 20 years.
Canada’s environment minister is planning to use a rare emergency order to protect the last of an endangered owl species. The species is in an area in British Columbia where old-growth forest has been slated for further clearcutting. The northen spotted owl faces serious threats to its population, as only one wild-born northern spotted owl remains, with two others, born as part of a breeding programme, recently released into the wild. Before industrial logging, there were nearly 1,000 northern spotted owls in British Columbia.
Northern spotted owl by Kyle Sullivan via Bureau of Land Management Oregon and Washington via Flickr
New discoveries
A species of ‘ethereal fairy lantern’ has been rediscovered in Japan after being thought extinct for 30 years. The flowering plant in the genus Thismia lives entirely underground except for its lantern-like flowers, rising above the soil during the wet season. Resembling mushrooms, one such species was originally discovered from a single specimen in 1992, but after scientists could not locate another and its habitat was destroyed, it was presumed extinct. A new individual has now been located 30 kilometres away from the original.
Now in its third edition, the RSPB Handbook of Garden Wildlife is a comprehensive and inspiring guide to making the most of your garden for wildlife. Full of practical tips, the book provides information on what plants to grow and how to structure your outside space to make it as attractive as possible for garden species, including mammals, birds, insects, invertebrates, reptiles and amphibians. A DIY chapter includes lots of projects such as nest box building and making your own pond.
There is also a comprehensive species account section which includes information and colour photographs of almost 400 garden species, helping you to take stock of the wildlife that is present in your garden, and to monitor how this changes over time. The third edition of the RSPB Handbook of Garden Wildlife also features new material on climate change, recycling and encouraging wild spaces in gardens.
Peter Holden
Peter Holden is the author of the bestselling RSPB Handbook of British Birds. He held senior positions at the RSPB for over 30 years and is the author of several books. Geoffrey Abbott formerly worked for the RSPB and now lectures part-time for the Field Studies Council. He is responsible for the book’s plants and insects sections.
Geoffrey Abbott
In this Q&A we chatted with Peter and Geoffrey about the book, about the importance and benefits of keeping our gardens ‘wild’ and their recommendations for small but impactful changes we can make in our outdoor spaces.
Now in its third edition, it has been 14 years since the first Handbook of Garden Wildlife was published. Do you think there have been significant changes in terms of types/styles of gardens and the wildlife they support during this time?
Geoffrey: there is now even more pressure on natural habitats and wildlife, and a continuing decline in many species such as bees, Starling and House Sparrow. This means that gardens are of even more value for conservation. At the same time there are more new houses, with smaller, or no gardens, and a continuing trend (as David Lindo so graphically points out in his foreword) to cover gardens with concrete or paving. There are also changes in our gardens due to the arrival of new species, some perhaps due to climate change. We have included some of the species (like Ivy Bee and Tree Bumblebee) that you are most likely to see in your garden.
Peter: Gardens will also be affected by changes in climate, especially if we have drier summers so we have introduced a new chapter on dry gardens.
In the book, you recommend keeping a log of the wildlife observed in a garden over the year. Do you think that this has become something of a lost art – taking the time and having the patience to observe the same bit of land over time and enjoying the process of noting the changes?
Peter: Yes, I see fewer people using a notebook and pencil when out birding and they don’t seem to be recording on mobiles either, even though there are excellent Apps like the BTO’s Birdnet. It should be easier than ever to keep notes at home using electronic spreadsheets and diaries. With programmes such as iRecord you can input photos and sightings and have the satisfaction of knowing these records are added to local and national databases – helping to build up a picture of changing wildlife populations.
In the introduction, you mention how important our gardens became to us during the Covid-19 lockdowns of 2020 and 2021. Improving them for the local wildlife has obvious benefits for conservation, but do you think there are also benefits from making these changes for ourselves and for our children?
Peter: There is more and more evidence showing environmental benefits on wellbeing and general health. There are also the additional benefits of exercise that comes from gardening and opportunities for relaxation. However, best of all, I see gardens being the ideal place for small children to start to learn about nature. It might be watching an ant’s trail, planting wildflowers, feeding the birds or helping to prepare a small pond, making pitfall traps for bugs or doing the Big Garden Birdwatch. And it’s not just parents – grandparents are often the ideal teachers for the next generation – with more time to share their own knowledge and experience.
In the section of your book on wilding, you describe the ideal garden as ‘organised chaos’. Do you think that the current trend for neatness and tidiness in a garden can be problematic in terms of attracting wildlife?
Geoffrey: Absolutely. Just one example is clearing all the dead heads from the borders which removes important food sources in the form of seeds, for birds and small mammals. Hollow dead stalks are also important sites for many hibernating insects. Tidying beds of leaf litter removes a whole community of invertebrates, and important feeding sites for thrushes, Blackbirds and Robins. Colonies of House Sparrows love scruffy corners and dense shrubs, while a pile of prunings and dead leaves can even provide a hibernation site for hedgehogs and a home for beetles and other invertebrates. Converting part of the garden to concrete or paving, or even replacing a lawn with Astroturf for easier management, will make whole areas sterile of wildlife.
One part of the book that I found particularly useful was the section on seasonal management, which also includes a handy monthly guide to the wildlife you might see and the tasks that need to be undertaken. How much would you say that maintaining a garden for wildlife differs from more ‘conventional’ gardening techniques?
Peter: That is an interesting question as there is not really a right or wrong way of doing things. It’s really about empathy – understanding your garden environment and gradually moving it from a homocentric place to one where wildlife is the focus. Every action will have nature in mind, while still keeping the garden as our own special place – it’s a delicate balance…and its fun…and over time our knowledge will grow as well.
For any readers with an average sized urban or suburban garden who wants a quick and affordable change that they can make, what would you recommend as something impactful but achievable that they could begin with?
We are both agreed that by far the best single improvement is to create a pond.
Geoffrey: This will greatly encourage garden wildlife by providing a source of water (for animals such as bees, birds and hedgehogs), mud for nesting birds, and a variety of extra insects as food. The pond will also add a whole new community of creatures, many of which leave the water at the adult stage. You may encourage frogs, toads or newts, as well as insects such as dragonflies and damselflies. These can give a whole new dimension to the summer garden.
Peter: A pond need not be large or complicated to make. A simple moulded plastic or flexible liner will suffice. It needs to be deep enough not to dry out but have some shelving edges to allow birds or hedgehogs to drink. However, avoid introducing fish – they are incompatible with most other wildlife in a garden pond.
Finally, what are you working on now? Do you have plans for further books?
Geoffrey: I will be writing wildlife notes for local magazines.
Peter: I will continue to work on updates for future editions of this Handbook and also for the RSPB Handbook of British Birds. I will continue with lectures for RSPB local members’ groups and hope to meet some of you there!
RSPB Handbook of Garden Garden Wildlife by Peter Holden and Geoffrey Abbott was published in February 2023. It is published by Bloomsbury Publishing and available from nhbs.com.
Half of the wetlands in Europe, the continental US and China have been lost in the past 300 years, according to a new study. Researchers found that some areas, including the UK, Ireland and Germany, have lost more than 75%. In total, an area the size of India has disappeared globally. More than 60% of these losses were driven by drainage for growing crops on uplands. Other reasons included the conversion to paddy fields, the creation of urban areas and peat extraction.
According to a report by The Wildlife Trusts, HS2 Ltd is “undervaluing” the amount of damage it is doing to the environment while overvaluing the benefits of its compensation measures. Phase 1, covering 140 miles between London and the West Midlands, will cause 7.9 times more nature loss than accounted for, with Phase 2a causing around 3.6 times more. The report found watercourses, ponds and trees that have been missed out from the data produced by the firm, along with problems with how nature is being valued. Well-established, tree-lined and species-rich hedgerows were given lower nature value than the new hedgerows that HS2 Ltd is going to plant.
Erosion of beaches along the south-east coast of Australia is having a significant effect on local biodiversity. Some beaches in the area are becoming increasingly vulnerable to coastal erosion caused by successive years of La Niña events. A study monitoring the shoreline between Noosa’s Main Beach and Coolum found that the shoreline has retreated by about 20 metres, while the sand dunes have receded between 7 and 10m and have been vertically eroded by 2–3m.
Extinction Risk
Sea turtles are under threat from warming seas and hotter beaches, according to new research. Australian scientists have suggested that marine turtles are unlikely to be able to change their nesting behaviour enough to mitigate the effects of higher sea surface temperatures. As the sex ratio of turtle hatchlings is determined by the temperature of the nests, warmer beaches will yield more females, impacting population dynamics. Higher temperatures have also been linked to lower hatchling success rates.
Sea turtles by Dawn Childs/USGS via NPS Climate Change Response via Flickr
The lynx is facing extinction in France, as the population is down to 150 adults at most. DNA tests have shown that the cats’ genetic diversity is so low that they will become locally extinct within the next 30 years unless there is urgent intervention. The species is under pressure from habitat loss, inbreeding, poaching and traffic collisions. The tests have shown that the population has a level of diversity equivalent to only 38 animals, and there are now calls to either introduce more lynxes from healthier groups or replace poached lynxes and exchange orphaned lynx cubs being cared for at wildlife rescue centres in various regions.
Pollution
Emissions of the five most harmful air pollutants dropped in 2018 across the European Union, including nitrogen oxides and ammonia. The new European Environment Agency report for 1990-2018 showed an overall trend of steady but slow progress by EU member states in reducing emissions of the main air pollutants present in Europe. The five most harmful air pollutants dropped between 1.6-6.7% between 2017 and 2018.
Policy
Costa Rica has announced an all-out ban on hammerhead shark fishing. Including smooth hammerhead, scalloped hammerhead and great hammerhead, this executive decree prohibits the capture, transportation, storage or sale of hammerhead sharks or their byproducts. Experts are saying this should have occurred in 2013 when hammerhead sharks were listed under CITES, as the animals were hunted for their fins and populations have declined by around 90% since then.
Scalloped Hammerhead Shark by Kris-Mikael Krister via Flickr
New discoveries
A new silent frog species has been described, found in Tanzania’s Ukaguru Mountains. Researchers discovered this species during an expedition in search of another species, the Churamiti maridadi tree toad. While frogs usually use sound to attract a mate, the males of this new species have tiny spines on their throats. Nearly 25% of all vertebrates in the Ukaguru Mountains are found nowhere else, meaning conservation of the area is essential.
NHBS is working with the Luxembourg Institute of Science and Technology (LIST), as part of the Camphibian Project, to help develop a novel approach that will improve amphibian monitoring using NEWTCAM, an underwater camera device. The Camphibian Project continues to improve and test the NEWTCAM to assess its value for biodiversity monitoring.
The problem
Amphibian species are facing global decline, due to a range of factors including climate change, habitat loss, infectious disease, and environmental contamination. As an important species group showing steep declines worldwide, amphibians are frequently used as biodiversity indicators, but our ability to document changes in amphibian population sizes and community structures is limited. Current methods for surveying and monitoring newts, such as eDNA, bottle trapping, netting and torching, are either unable to produce accurate population size estimates or very invasive, frequently risking the health of individuals. Furthermore, these methods can be weather dependant, as certain conditions, such as heavy rain or temperatures above or below optimal levels lead to surveys being called off. Reliable survey and monitoring methods are essential for assessing changes in populations and ecological communities, data which feed into environmental research and policy support.
The concept
The automation of field observations has been improved in recent years with the development of camera traps, but to date there has been no viable aquatic camera trap. The NEWTCAM (originally developed as the Newtrap) is an open underwater tunnel with an integrated camera and lighting system that automatically captures high resolution time series of standardised images of aquatic animals. The NEWTCAM can be left unattended in the water for several days because the animals are free to enter and exit the NEWTCAM and are not captured or handled in any way, greatly improving survey effort, detection rates, and reducing stress on the animals.
In common with all camera traps the NEWTCAM produces 1000s of images and/or videos. These are managed with the NEWTCAM Manager (a separate web application) which supports all the steps of image processing by:
Enabling the centralisation of data from multiple NEWTCAM devices, survey sites, projects, and even organisations.
The annotation of images and videos by species, stage, gender, and behaviour. The data can then be used as a reference image library to train a new AI algorithm or processed with an appropriate existing identification algorithm (for more information see RCNN).
In future, existing AI algorithms (e.g. for newts in North Western Europe) will be integrated into NEWTCAM Manager, enabling the analysis of data sets.
Standardisation
The NEWTCAM takes standardised images from a predetermined angle, for example the underside of a newt (or other target species), from which the species, sex, development stage, body measurements, and individual identification (if individual variation exists, such as the irregular pattern of dark spots on the underside of great crested newts) can be determined. This data can then be used to provide important information about the presence, population size and dynamics of the species or communities of interest.
Benefits when compared to traditional survey methods:
Reduced disturbance to sensitive habitats because the NEWTCAM is placed in situ once, but can then record data for weeks or months.
Zero handling of individuals because the NEWTCAM is an open tunnel that allows individuals to enter and exit at will.
Reduced number of site visits compared to bottle trapping, netting, and torching.
Easy deployment in the field meaning that more sites can be surveyed over a longer period and with a higher temporal resolution than when using standard methods.
Standardised field observations – the NEWTCAM will enable the development of improved AI-based processing methods and their centralisation to produce well-formatted databases for large-scale and global change studies because the cameras produce images with the same size, resolution, background, specimen position and illumination.
The potential to provide accurate population estimates through the identification of individuals (where individuating marking exist).
Greater freedom to place the NEWTCAM at different sites and depths throughout the water body.
Surveys can be carried out in adverse weather conditions including heat waves and heavy rain.
The orientation of the NEWTCAM can be changed so that different target species can be filmed from different angles.
The Camphibian Project
The Camphibian Project – has two main aims, to improve the functionality, durability and versatility of the NEWTCAM and to assess its value as a user-friendly freshwater wildlife monitoring method.
These aims will be accomplished through a programme of technological development work at LISTs laboratories and the NHBS workshop followed by a series of field experiments conducted by LIST and early user field trials. These experiments will assess:
Whether NEWTCAM offers a reliable and robust approach for detecting and estimating the population size and dynamics of a wide range of amphibian species.
The NEWTCAMs ability to detect a range of different species and life stages in a wide variety of habitats.
Whether the data produced by the NEWTCAM is sufficient to produce reliable population estimates for species with individuating patterns at the larval stage.
As the NEWTCAM is developed, there will be opportunities for ecologists to test the equipment and the NEWTCAM will be displayed at conferences and events (details to be confirmed). If you would like to find out more, please sign up to our mailing list.
NHBS is providing funding alongside Fonds National de la Recherche Luxembourg, and LIST (Luxembourg Institute of Science and Technology).
Ghosts in the Hedgerow is the new book by conservation research scientist Dr Tom Moorhouse. His previous book, Elegy for a River, was a heartfelt tribute to UK rivers and included many wonderful tales of his fieldwork adventures beside rivers, fens, lakes and more. He discussed the threats currently facing these habitats and their occupants, the conservation work currently taking place and what he believes is needed to repair the degradation that has occurred. Ghosts in the Hedgerow follows a similar format but instead looks at Britain’s favourite mammal – the hedgehog.
Moorhouse presents the full story of the hedgehogs’ plight in the face of humanity, following three years of conservation research focusing on the species. This book opens with a classic fictional murder mystery scene: the guests are gathered around a detective who announces that a murder has occurred, the murder of a hedgehog. This tongue-in-cheek opening with its amusing if perhaps stereotypical cast of characters makes the data-dense introductory chapter easy to read. Snippets of this continue throughout as welcome breaks to the often sombre topics covered. The book is split into five more sections, the first four covering each main ‘suspect’ in the decline of hedgehogs: cars, agriculture, modern gardens, and the badger – a species which is also the focus of conservation efforts. The final section ‘A Murderer Unmasked’ and the afterword ‘One Final Word’ presents Moorhouse’s solution.
The second chapter, ‘Driven to Destruction’, highlights the main obstacle behind identifying the significant causes of hedgehog decline and developing an effective solution: the lack of accurate population estimates. It is generally quoted that there were around 36 million individuals in the 1950s. But it is worth noting that this number was based on one ‘survey’ where ten hedgehogs were seen in ten acres on a single walk, thus estimating a population density of one hedgehog per non-urban acre in Great Britain, regardless of habitat type (excluding upland areas where hedgehogs are known to be scarce). Current estimations of the overall population are based on various smaller surveys of hedgehogs within certain habitats, with that data extrapolated based on the amount of these habitats in the UK. But due to the small number of these habitat surveys and their short study time, each current population estimate has limited reliability. Without accurate and reliable population estimates, the true impact of the various threats is unclear, and the implemention and monitoring of conservation efforts can be jeopardised.
Moorhouse also highlights another issue with hedgehog conservation, or with conservation in general, in chapter three, ‘The Tale of Tommy Brock’, – trade-offs. No conservation effort occurs in a vacuum, just as no species lives in a vacuum. Any efforts made for one species will likely have an impact on another, whether that be positive or negative. Badgers have faced decades of persecution, often being the scapegoat of many agricultural issues. Their populations had declined so much that they were considered uncommon, until the 1980s when concerted efforts were made to protect them. Badgers are now one of the most protected species in the UK and their numbers are up 50-80% (depending on the survey data). Ghosts in the Hedgerow discusses one of the potential environmental trade-offs of this conservation success – the impact on hedgehogs, one of the badgers’ prey items. Hedgehogs tend to avoid badgers, so they are increasingly pushed out of more and more areas as badger numbers increase. This story is not as simple as it first seems, however, as badgers are found not to be the most important factor when studies examined hedgehog densities. Additionally, as Moorhouse points out, badgers and hedgehogs have coexisted for thousands of years; while they may be contributing towards hedgehog decline, it is unlikely that they are the root cause.
Throughout the book, Moorhouse takes these complicated factors and picks them apart, examining the reliability of the data and challenging baseless assumptions. He discusses the impact of hedgerow removal in the 1930s and 40s, the emerging threat of automatic lawnmowers, the problem of enclosed gardens and the reluctance of landowners to cut holes into fences for ‘hedgehog highways’. He includes injuries caused by strimmers, the impact of slug pellet overuse, the massive loss of invertebrate biomass and diversity, and the increasing impacts of agricultural conversion and intensification, and urban expansion. Each one of these stressors may have been survivable on its own if it weren’t for the others. Therefore, it is not one ‘murderer’ but the synergistic interaction between a combination of stressors creating a cumulative effect on hedgehog populations. Moorhouse refers to it as ‘death by a thousand cuts’.
The final sections of Ghosts in the Hedgerow, chapter six ‘A Murderer Unmasked’ and the afterword ‘One Final Word’, is where Moorhouse presents his solution. The important part of any conservation proposal is to make sure, as Moorhouse puts it, it doesn’t result in a “trade-off in human lives”. Moorhouse suggests small lifestyle changes, for instance reducing your meat intake, particularly beef as its production is a major cause of biodiversity loss and global emissions; purchasing food from farms that use less environmentally harmful chemicals or practices; writing to MPs about local ventures such as planting street trees and traffic reductions; recording hedgehog sightings; and allowing your garden to become wilder and more accessible. The book ends on a final word, a collation of advice from several well-known and passionate hedgehog lovers, experts and authors, including David Wembridge, Hugh Warwick and Pat Morris. He believes that these small-scale personal changes, alongside more large-scale governmental and policy changes, such as more environmentally friendly regulations for new building developments, more sustainably managed public green spaces and serious reductions in consumption and food waste, might give hedgehogs the best possible opportunity to thrive.
Ghosts in the Hedgerow is a funny but serious, light-hearted but uncomfortably honest lament for the plight of our favourite mammal and a strong call for widespread conservation to be implemented. It is a well-researched and compelling read, filled with footnotes, puns and anecdotes that bring this topic to life. This truly is the perfect read for anyone who loves hedgehogs, wants to be more wildlife friendly, or is just interested in the complicated problems of conservation efforts in Britain.
Human activity has degraded more than a third of the Amazon rainforest. New research has shown that up to 38% of the forest has been affected by human actions, with the four key disturbances being fire, selective logging (including illegal practices), extreme drought and edge effects (the changes that occur in areas next to deforested areas). The level of degradation is far greater than previously understood and not only has consequences for the climate crisis and biodiversity loss but also Indigenous and non-Indigenous communities.
England’s coast faces multiple threats from dredging, sewage and pollution. The Environment Agency has warned that dredging will likely increase around the coast, with pollution and sewage adding pressures to coastal ecosystems. In 2021, three quarters of shellfish waters around England failed to meet aspirational standards for environmental protection, with dredging and pollution coming under increased scrutiny following mass die-offs of crabs and lobsters. The findings from the EA report published last week suggest that dredging was unlikely to be the cause but this has been criticised by some scientists. There are now calls for stronger targets to cut pollution, a ban on destructive fishing in marine protected areas, and stricter penalties for sewage discharges.
The UK government has allowed ’emergency’ use of a banned bee-harming pesticide for the third year in a row, just days after the EU tightens protections against emergency deregulations. The neonicotinoid thiamethoxam is lethal to bees, and the authorisation comes just a month after the UK government advocated for a global reduction target at COP15. UK guidance states that emergency applications should not be granted more than once and the UK Expert Committee on Pesticides once again advised against allowing thiamethoxam to be used, but was again ignored by the government.
A new study has found plastic in the scat of fishing cats living near Colombo, Sri Lanka. The plastics varied in size from microplastics to larger macroplastics and were believed to have been ingested via their prey. Only six of the 276 samples taken were found to contain plastics but this is still a concern for the vulnerable species. Further research is needed to assess any potential health impacts on the species.
An investigation has found that endangered sharks are being sold as ‘flake’ in South Australian fish and chip shops. According to the study, less than a third of servings meet seafood labelling standards. Out of 96 fish and chip shops and 10 fresh fish retailers, only 29 servings were actually gummy shark, one of only two shark species that Australian Fish Names Standard says can be sold as flake in Australia. Three servings were narrownose smooth-hound, a critically endangered shark; two were the endangered shortfin mako; one was smooth hammerhead, considered vulnerable; 19 were the critically endangered school shark; and 15 servings were whiskery shark.
Gillnets in Bangladesh are a major threat to both the Ganga River dolphin and the Irrawaddy dolphin. Entanglement in nets, along with boat propeller strikes, killed 130 Ganga River dolphins between 2007 and 2016. Since 2002, the manufacture, marketing, import, hoarding, carrying, possession or use of any kind of gillnet is prohibited but they are still widely used by fishers due to their effectiveness at catching large numbers of fish. There are currently only 2,000 Ganga River dolphins and 6,000 Irrawaddy dolphins left in Bangladesh.
Research
A study has suggested that reaching net zero greenhouse gas emissions in England and Wales by 2050 could lead to an extra 2 million years of life. Many of the proposed policies in the UK will reduce harmful environmental factors such as air pollution, as well as encouraging healthier behaviours such as a balanced diet and exercise. These policies, if implemented, would result in significant reductions in mortality across English and Welsh populations. Retrofitting homes with insulation, reducing red meat consumption, replacing car journeys with walking or cycling, and reducing air pollution could also lead to people living with fewer health conditions.
Seagrass restoration trails have begun in Cornwall. The first round of planting for the project, taking place in the River Fal, has been completed, and is the first attempt by Cornwall Wildlife Trust to restore seagrass meadows. A group of volunteers spent more than 120 hours collecting over 4,000 seeds last summer and planting them. It is hoped that this project will expand to an area 10 times the size used in the first round of trails.
