Can the UK's Common Toads Be Saved from Traffic and Population Collapse?
It is Friday evening at half past seven, but rather than going out or watching a film, I've caught a train to a town in Wiltshire to join local helpers from a amphibian rescue group. These dedicated individuals give up their evenings to safeguard the local toad population.
A Worrying Decline in Population
The Bufo bufo is growing more rare. A latest research led by an wildlife conservation group showed that the British common toad numbers have almost halved since the mid-1980s. Seeing a creature that has been a stalwart of the British countryside in decrease is described as "worrying" by experts. Toads "don't require very particular environments" and "ought to live successfully in most of habitats in the UK," so if even they are not managing to survive, "it indicates that the ecosystem is unbalanced."
The UK toad population has almost halved since 1985
The Danger from Roads
Though the research didn't cover the reasons for the decline, traffic is a major factor. Calculations indicate that 20 tonnes of toads are crushed on UK roads every year – that is, hundreds of thousands. In contrast to frogs, which would probably be happy to mate "with just a small container," toads prefer big bodies of water. Their ability to stay out of water for longer than frogs allows they can journey farther to reach them – often hundreds of metres. They tend to stick to their traditional paths – it's typical for adult toads to go back to their birth pond to mate.
Migration Patterns
Fittingly, the initial amphibians begin their quest for a partner around Valentine's day, but some move as late as spring, waiting until it gets dark and moving through the night. During that time, toads begin migrating from where they have been overwintering "almost simultaneously."
A local helper, who was raised in the area and has been trying to protect its amphibians since he was a child, explains that "Their sole purpose: to go and mate." If their path crosses a street, they could be killed by traffic, and that breeding season would never happen – preventing a next generation of toads from being born.
Rescue Groups Across the UK
Finding many of dead toads on local roads "inherently strikes a chord with people," and has resulted in the formation of toad patrols across the UK – hundreds of organizations are officially listed with a national initiative. These groups pick up toads and transport them across roads in buckets, as well as recording the number of toads they find and advocating for other safety solutions, such as blocked roads and amphibian passages.
Patrols usually work during the breeding period, when toad crossings are frequent. However, this means they can miss groups of toadlets, which, having existed as spawn and then juveniles, leave their water habitats over an unpredictable schedule in the end of summer. Because of their small stature – 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 get data on them. At least when adult toads are killed, their remains can be tallied.
Annual Efforts
In contrast to many groups, one local team, who are in their eighth season of operating, go out year-round – not nightly, but whenever weather are warm and wet, or if someone has reported about a amphibian spotting in their group chat. When I request to accompany them on duty, they admit it is "not ideal conditions" – toad hibernation season has begun and it's been a dry day – but several of the helpers gamely agree to walk up and down their route with me and search for any toads. "Should anyone can find any toads tonight, those two will spot one," says the group coordinator, indicating her 14-year-old son and the longtime volunteer. After for two hours without a glimpse of any amphibians, and now they have climbed over a barbed wire fence to inspect beneath some logs.
Community Involvement
The family duo became part of the group a while back. The youngster loves all things nature-related and has an goal to become a conservationist, so his parent started to search for things they could do jointly to help local wildlife. Now she loves it as much as he does, the middle-aged small business owner explains – so when the team was seeking a new manager lately, she decided to step up.
The teenager, too, has played an important role in the group. A clip he made, urging the municipal authority to close a street through a nature reserve during migration season, swung the decision the team's way. After a twelve months of campaigning, the authority agreed to an "access-only" rule between 5pm and 5am from late winter through to spring. Most drivers respected and avoided the road.
Other Wildlife and Challenges
A few vehicles go past when I'm out on duty and we discover some victims as a result – no toads, but several crushed salamanders. We spot one live amphibian as well, and the youngster is particularly pleased to see a daddy longlegs, which moves in his hands. Yet despite the group's hardest attempts to show me a toad, the native community has clearly settled down for the colder months. It appears that I wouldn't have had any more luck anywhere else in the country – all the rescue teams I contact clarify that it's near-impossible at this season.
The group expects to help approximately 10,000 adult toads across the road
A message I get from a different helper, who has generously made the effort to check for toads in a famous site, thought to be the largest accurately monitored toad population in the UK, arrives in my inbox with the subject line: "None found." However, in February and March, he informs me, the group expects to help approximately ten thousand mature amphibians across the road.
Impact and Limitations
How much of a difference can these organizations actually make? "The fact that volunteers are doing this regularly on chilly, wet and miserable late nights is remarkable," notes an researcher. "This effort that very much deserves recognition." However, while rescue teams are able to reduce the drop, they cannot prevent it entirely – not least because vehicles is just one danger.
Other Dangers
The climate crisis has meant extended spells of dry weather, which cause the poor environment for some of the creatures that toads consume, such as invertebrates, while higher water temperatures have led to an increase of blue-green algae, which can be toxic to toads. Warmer cold seasons also lead toads to emerge from their hibernation more often, disrupting the resource preservation crucial to their existence. Loss of environment – especially the loss of big water bodies – is another menace.
Researchers are "always a bit worried about overemphasizing practical benefits on biodiversity," but "It's important in just having these animals around." But toads do have an important role in the ecosystem, eating almost any invertebrates or small animals they can swallow and in turn feeding a number of birds and mammals, such as wildlife. Enhancing situations for toads – ie creating more ponds, protecting forests and installing toad tunnels – "we'll improve them for a wide range of other species."
Cultural Importance
Another reason to work to preserve toads present is their "historical significance," adds an expert. Myths and folklore around toads date back {centuries|hundred