Can the UK's Common Toads Survive from Traffic and Terrible Decline?
It's Friday evening at half past seven, but instead of going out or relaxing at home, I've taken a train to a town in Wiltshire to join volunteers from a toad patrol. These dedicated individuals give up their nights to safeguard the native amphibian community.
A Worrying Decline in Population
The common toad is becoming increasingly uncommon. A recent study led by an amphibian and reptile charity showed that the British common toad numbers have dropped by half since the mid-1980s. Seeing a species that has been a stalwart of the British countryside in decline is labeled "concerning" by researchers. Toads "don't need very specific conditions" and "ought to live quite well in the majority of areas in Britain," so if even they are struggling to persist, "it indicates that things are not as they should be."
The UK toad population has almost halved since 1985
The Danger from Traffic
Though the research didn't examine the reasons for the drop, cars certainly plays a part. Estimates indicate that 20 tons of toads are killed on British roads annually – that is, several hundred thousand. Unlike frogs, which might be happy to mate "if you left out a bucket of water," toads favor big bodies of water. Their capacity to remain away from water for more time than frogs means they can journey farther to find them – often long distances. They usually stick to their ancestral migration routes – it's common for adult toads to return to their natal pond to mate.
Migration Patterns
Fittingly, the initial amphibians begin their quest for a partner around February 14th, but some move as late as April, waiting until it gets night and moving after sunset. During that period, toads begin migrating from where they have been overwintering "all pretty much at the same time."
One volunteer, who was raised in the area and has been trying to protect its amphibians since he was a boy, explains that "Their sole purpose: to go and have an orgy." If their route happens to a street, they could be killed by traffic, and that breeding season would be lost – preventing a new generation of toads from being produced.
Rescue Groups Throughout the United Kingdom
Seeing many of dead toads on nearby streets "inherently strikes a chord with people," and has resulted in the formation of rescue teams across the UK – hundreds of organizations are currently registered with a national initiative. These teams collect toads and transport them across roads in containers, as well as recording the quantity of toads they find and lobbying for other protection measures, such as road closures and amphibian passages.
Patrols usually work during the migration season, when toad crossings are more regular. However, this implies they can overlook groups of toadlets, which, having been eggs and then juveniles, exit their ponds over an unpredictable schedule in late summer. Because of their size – just one or two centimetres wide – "they can get obliterated by car traffic." And as being run over "basically turns them into mush," it's more difficult to collect information on them. At least when adult toads are killed, their carcasses can be counted.
Annual Work
Unlike many groups, a specific volunteer group, who are in their eighth season of operating, go out throughout the year – not nightly, but when conditions are warm and wet, or if a member has posted about a toad sighting in their group chat. When I ask to join them on patrol, they concede it is "not ideal conditions" – toad hibernation season has started and it's been a dry day – but a few of the volunteers gamely agree to walk up and down their route with me and see what we can find. "Should anyone can locate any toads tonight, that pair will spot one," says the group coordinator, indicating her 14-year-old son and the longtime volunteer. We've been out for two hours without a single toad sighting, and now they have climbed over a wire barrier to check under some logs.
Community Involvement
The mother and son became part of the patrol a year and a half ago. The teenager loves all things wildlife and has an ambition to become a conservationist, so his parent started to look for activities they could do together to protect native animals. Now she enjoys it as much as he does, the middle-aged small business owner explains – so when the group was looking for a new manager lately, she decided to step up.
The teenager, too, has been instrumental in the group. A clip he created, imploring the municipal authority to close a road through a nature reserve during migration season, influenced the outcome the group's way. After a twelve months of lobbying, the council approved an "access-only" restriction between evening and morning from late winter through to spring. Most drivers respected and avoided the road.
Additional Species and Difficulties
Several vehicles go by when I'm out on duty and we find some victims as a consequence – no toads, but three squashed newts. We spot one living newt as well, and the teenager is particularly pleased to see a daddy longlegs, which moves in his hands. Yet in spite of the group's hardest attempts to show me a toad, the native community has obviously gone dormant for the winter. It seems that I couldn't have found any better success anywhere else in the country – all the patrol groups I contact explain that it's near-impossible at this time of year.
They project rescuing nearly 10,000 grown amphibians during migration
A message I receive from another volunteer, who has kindly taken the trouble to look for toads in a famous site, considered the largest accurately monitored toad group in the UK, arrives in my inbox with the title: "None found." However, in February and March, he tells me, the team plans to assist approximately ten thousand adult toads across the road.
Impact and Challenges
How much of a difference can these groups truly achieve? "The reality that volunteers are performing this regularly on cold, damp and unpleasant evenings is quite extraordinary," notes an expert. "This effort that very much should be celebrated." However, while rescue teams are able to reduce the drop, they cannot prevent it entirely – partly since traffic is just one danger.
Additional Threats
The global warming has meant extended spells of drought, which create the poor environment for some of the creatures that toads consume, such as invertebrates, while warmer ponds have led to an increase of blue-green algae, which can be toxic to toads. Milder winters also cause toads to wake up from their dormancy more frequently, disrupting the resource preservation crucial to their life cycle. Loss of environment – particularly the loss of large ponds – is an additional threat.
Researchers are "often concerned about putting too much of a utilitarian spin on biodiversity," but "It's important in just their presence." But toads play an important role in the food chain, consuming pretty much any small creatures or tiny organisms they can fit in their mouths and in turn feeding a variety of predators, such as wildlife. Improving situations for toads – such as creating more ponds, protecting forests and constructing toad tunnels – "benefits for a wide range of other species."
Cultural Significance
Another reason to work to preserve toads present is their "historical significance," notes an expert. Legends and tales around toads date back {centuries|hundred