Will the UK's Common Toads Survive from Roads and Population Collapse?
It's Friday night at half past seven, but instead of going out or watching a film, I've caught a train to a town in the countryside to join volunteers from a toad patrol. These dedicated individuals sacrifice their evenings to safeguard the local toad population.
A Worrying Drop in Population
The Bufo bufo is growing more rare. A recent study conducted 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 fixture of the UK landscape in decrease is labeled "worrying" by experts. Toads "don't require very particular environments" and "ought to live successfully in most of habitats in Britain," meaning if even they are struggling to persist, "it indicates that things are not as they should be."
Toad populations across the UK have declined by almost 50% since the 1980s
The Threat from Traffic
Though the study didn't examine the causes for the decline, traffic certainly plays a part. Calculations indicate that 20 tons of toads are crushed on UK roads annually – that is, several hundred thousand. Unlike frogs, which might be happy to mate "with just a bucket of water," toads prefer large ponds. Their ability to stay out of water for more time than frogs means they can journey farther to reach them – sometimes hundreds of metres. They usually follow their ancestral migration routes – it's common for adult toads to return to their birth pond to mate.
Migration Habits
Fittingly, the initial amphibians begin their quest for a partner around Valentine's day, but others travel as late as April, waiting until it gets night and moving after sunset. During that period, toads start moving from wherever they have been overwintering "almost simultaneously."
One volunteer, who grew up in the region and has been trying to protect its amphibians since he was a boy, notes that "They've got just one focus: to go and mate." If their path happens to a road, they could be killed by traffic, and that breeding season would be lost – stopping a next generation of toads from being produced.
Toad Patrols Throughout the UK
Finding hundreds of dead toads on nearby streets "inherently strikes a chord with people," and has led to the formation of rescue teams across the UK – hundreds of organizations are currently registered with a countrywide program. These teams pick up toads and transport them across roads in buckets, as well as recording the number of toads they encounter and advocating for other protection measures, such as road closures and underground wildlife tunnels.
Volunteers tend to operate during the breeding period, when amphibian movements are more regular. However, this means they can miss numbers of toadlets, which, having existed as eggs and then juveniles, exit their ponds over an irregular timetable in late summer. Because of their size – just a couple of cm 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 lost, their remains can be counted.
Year-Round Work
In contrast to most patrols, a specific volunteer group, who are in their eighth year of operating, go out year-round – not nightly, but when conditions are damp, or if someone has reported about a toad sighting in their messaging app. When I ask to join them on patrol, they admit it is "not ideal conditions" – toad hibernation season has begun and it's been a dry day – but a few of the helpers gamely agree to patrol their route with me and search for any toads. "If anyone can locate any toads tonight, that pair will find one," says the patrol manager, pointing to her 14-year-old son and the experienced member. After for 120 minutes without a single toad sighting, and now they have scaled a wire barrier to check under some logs.
Family Participation
The mother and son became part of the group a while back. The teenager loves all things nature-related and has an ambition to become a conservationist, so his parent started to search for things they could do jointly to help local wildlife. Now she enjoys it as much as he does, the 41-year-old entrepreneur tells me – so when the group was looking for a fresh coordinator recently, she volunteered for the role.
The teenager, too, has played an important role in the group. A clip he created, imploring the local council to block a street through a nature reserve during breeding time, swung the decision the team's way. After a twelve months of campaigning, the authority approved an "restricted access" rule between evening and morning from late winter through to spring. Most drivers duly avoided the route.
Additional Species and Difficulties
A few cars go by when I'm out on duty and we find some casualties as a result – no amphibians, but several crushed salamanders. We see one live amphibian as well, and the youngster is especially excited to see a harvestman, which dances in his palms. Yet in spite of the group's hardest attempts to show me a toad, the local population has clearly gone dormant for the winter. It appears that I couldn't have found any better success elsewhere in the country – all the rescue teams I contact clarify that it's near-impossible at this season.
They project rescuing nearly 10,000 grown amphibians during migration
A message I get from a different helper, who has generously taken the trouble to look for toads in a noted location, considered the largest accurately monitored toad group in the UK, reaches me with the subject line: "No toads." However, in February and March, he informs me, the team expects to help approximately ten thousand adult toads across the road.
Effectiveness and Limitations
How much of a difference can these groups truly achieve? "The reality that volunteers are doing this regularly on chilly, wet and miserable late nights is quite extraordinary," notes an researcher. "That's something that very much deserves recognition." However, while toad patrols are able to reduce the drop, they can't stop it completely – not least because vehicles is not the only threat.
Additional Threats
The climate crisis has meant extended spells of drought, which create the wrong conditions for some of the creatures that toads consume, such as invertebrates, while warmer ponds have led to an rise of toxic plants, which can be harmful to toads. Warmer cold seasons also lead toads to wake up from their hibernation more frequently, interfering with the resource preservation vital to their existence. Habitat destruction – especially the disappearance of large ponds – is another menace.
Researchers are "often concerned about putting too much of a utilitarian spin on wildlife," but "There is a big value in just having these animals around." But toads do have an important role in the ecosystem, eating pretty much any small creatures or small animals they can fit in their mouths and in turn sustaining a variety of predators, such as wildlife. Enhancing conditions for toads – such as building water habitats, protecting forests and installing amphibian passages – "benefits for a wide range of additional wildlife."
Cultural Importance
An additional motive to try to keep toads present is their "historical significance," notes an specialist. Myths and folklore around toads date back {centuries|hundred