Will Britain's Common Toads Survive from Traffic and Population Collapse?
It is Friday night at 7:30, but rather than going out or relaxing at home, I've caught a train to a town in Wiltshire to join volunteers from a amphibian rescue group. These committed people sacrifice their evenings to safeguard the local toad population.
A Worrying Decline in Population
The Bufo bufo is growing more rare. A latest research conducted by an amphibian and reptile charity revealed that the British common toad numbers have almost halved since the mid-1980s. Seeing a species that has been a fixture of the British countryside in decrease is labeled "concerning" by researchers. Toads "don't need very particular environments" and "should be able to live quite well in the majority of areas in Britain," meaning if even they are not managing to survive, "it indicates that the ecosystem is unbalanced."
Toad populations across the UK have declined by almost 50% since the 1980s
The Threat from Traffic
Though the study didn't cover the reasons for the decline, traffic certainly plays a part. Estimates suggest that 20 tons of toads are crushed on UK roads every year – in other words, several hundred thousand. In contrast to frogs, which might be happy to mate "if you left out a small container," toads favor big bodies of water. Their ability to stay out of water for longer than frogs means they can travel further to find them – often hundreds of metres. They tend to stick to their traditional paths – it's common for mature amphibians to return to their natal pond to mate.
Migration Patterns
Appropriately enough, the initial amphibians begin their quest for a partner around February 14th, but others travel as far as spring, waiting until it gets night and travelling through the night. During that period, toads begin migrating from where they have been hibernating "almost simultaneously."
One volunteer, who was raised in the region and has been working to save its toad population since he was a boy, explains that "Their sole purpose: to go and mate." If their path crosses a street, they could all get run over, and that breeding season would be lost – stopping a new generation of toads from being produced.
Rescue Groups Throughout the UK
Finding many of toad carcasses on nearby streets "inherently strikes a chord with people," and has led to the formation of rescue teams throughout the UK – hundreds of organizations are officially listed with a national initiative. These teams collect toads and carry them over streets in containers, as well as counting the quantity of toads they find and advocating for other protection measures, such as road closures and underground wildlife tunnels.
Volunteers tend to operate during the migration season, when toad crossings are more regular. However, this means they can miss numbers of young toads, which, having been eggs and then juveniles, exit their water habitats over an unpredictable schedule in the end of summer. Because of their small stature – just one or two centimetres wide – "they are destroyed by vehicles." And as being run over "essentially crushes them," it's harder to get data on them. At least when mature amphibians are lost, their carcasses can be counted.
Annual Work
In contrast to many groups, a specific volunteer group, who are in their eighth year of functioning, go out year-round – not every night, but when weather are warm and wet, or if a member has reported about a amphibian spotting in their group chat. When I ask to join them on duty, they admit it is "not ideal conditions" – winter dormancy has begun and it's been a arid period – but a few of the volunteers gamely agree to walk up and down their area with me and search for any toads. "Should anyone can locate any toads tonight, that pair will spot one," says the patrol manager, indicating her 14-year-old son and the experienced member. We've been out for 120 minutes without a glimpse of any amphibians, and now they have scaled a barbed wire fence to check under some logs.
Family Participation
The family duo joined the group a year and a half ago. The youngster adores all things nature-related and has an goal to become a environmentalist, so his mother started to search for activities they could do together to help local wildlife. Now she enjoys it as much as he does, the middle-aged small business owner explains – so when the team was looking for a fresh coordinator lately, she volunteered for the role.
The teenager, too, has been instrumental in the group. A video he created, urging the municipal authority to close a street through a nature reserve during breeding time, swung the decision the group's way. After a year of lobbying, the authority agreed to an "restricted access" rule between evening and morning from late winter through to April. Most drivers duly avoided the road.
Additional Species and Difficulties
A few vehicles go by when I'm out on patrol and we find some casualties as a consequence – no amphibians, but three squashed newts. We spot one living newt as well, and the youngster is especially excited to see a daddy longlegs, which dances in his palms. Yet in spite of the team's best efforts to show me a toad, the local population has obviously settled down for the winter. It seems that I couldn't have found any more luck anywhere else in the nation – all the rescue teams I contact explain that it's near-impossible at this time of year.
The group expects to help approximately 10,000 adult toads across the road
One email I get from a different helper, who has kindly made the effort to check for toads in a famous site, considered the biggest tracked toad population in the UK, arrives in my inbox with the subject line: "None found." However, in February and March, he tells me, the team expects to help approximately 10,000 adult toads over the street.
Impact and Challenges
How much of a difference can these organizations truly achieve? "The reality that people are doing this consistently on cold, damp and unpleasant late nights is remarkable," notes an researcher. "This effort that very much should be celebrated." However, while rescue teams are able to slow the decline, they cannot prevent it entirely – partly since traffic is just one danger.
Other Dangers
The climate crisis has resulted in longer periods of drought, which cause the poor environment for some of the animals that toads consume, such as worms and slugs, while higher water temperatures have caused an rise of blue-green algae, which can be toxic to toads. Milder winters also lead toads to emerge from their dormancy more often, interfering with the resource preservation crucial to their life cycle. Loss of environment – especially the disappearance of large ponds – is an additional threat.
Experts are "always a bit worried about putting too much of a utilitarian spin on wildlife," but "There is a big value in just their presence." But toads play an significant part in the ecosystem, eating almost any invertebrates or small animals they can fit in their mouths and in turn sustaining a number of predators, such as wildlife. Improving situations for toads – such as building water habitats, conserving woodland and installing toad tunnels – "we'll improve them for a whole bunch of additional wildlife."
Cultural Importance
Another reason to try to keep toads around is their "important cultural value," adds an specialist. Legends and tales around toads date back {centuries|hundred