Can the UK's Common Toads Survive from Traffic and Population Collapse?
It's Friday night at 7:30, but rather than heading to the pub or relaxing at home, I've taken a train to a town in Wiltshire to meet up with volunteers from a amphibian rescue group. These dedicated individuals sacrifice their evenings to protect the local toad population.
A Worrying Decline in Numbers
The Bufo bufo is growing more rare. A recent study led by an amphibian and reptile charity revealed that the British common toad numbers have almost halved since the mid-1980s. Observing a creature that has been a stalwart of the British countryside in decrease is described as "worrying" by researchers. Toads "don't need very specific conditions" and "should be able to live quite well in most of habitats in Britain," so if even they are struggling to persist, "it kind of suggests that the ecosystem is unbalanced."
Since 1985, Britain's toad numbers have nearly been cut in half
The Danger from Roads
Though the research didn't cover the reasons for the drop, traffic is a major factor. Calculations suggest that 20 tonnes of toads are killed on UK roads every year – in other words, several hundred thousand. In contrast to frogs, which might be happy to mate "with just a small container," toads favor big bodies of water. Their ability to stay out of water for more time than frogs allows they can travel further to find them – sometimes hundreds of metres. They usually stick to their ancestral migration routes – it's common for adult toads to go back to their birth pond to mate.
Migration Habits
Fittingly, the first toads begin their quest for a partner around February 14th, but some move as late as April, waiting until it gets night and moving through the night. During that time, toads start moving from where they have been hibernating "almost simultaneously."
A local helper, who was raised in the area and has been trying to protect its toad population since he was a child, notes that "They've got just one focus: to go and have an orgy." If their route happens to a road, they could be killed by traffic, and that mating period would never happen – stopping a next generation of toads from being born.
Toad Patrols Throughout the UK
Finding hundreds of toad carcasses on local roads "resonates deeply with people," and has resulted in the formation of toad patrols throughout the UK – hundreds of organizations are currently registered with a national initiative. These groups collect toads and transport them across roads in buckets, as well as counting the quantity of toads they encounter and advocating for other safety solutions, such as road closures and underground wildlife tunnels.
Patrols usually work during the migration season, when toad crossings are frequent. However, this implies they can overlook numbers of young toads, which, having been spawn and then juveniles, exit their water habitats over an irregular timetable in late summer. Because of their small stature – just a couple of cm wide – "they can get obliterated by car traffic." And as being hit "basically turns them into mush," it's more difficult to collect information on them. At least when adult toads are lost, their carcasses can be tallied.
Annual Efforts
In contrast to most patrols, one local team, who are in their eighth season of functioning, go out year-round – not nightly, but when conditions are damp, or if a member has posted about a toad sighting in their group chat. When I request to accompany them on patrol, they admit it is "not ideal conditions" – winter dormancy has started and it's been a dry day – but a few of the volunteers gamely agree to patrol their area with me and see what we can find. "If anyone can find any toads tonight, those two will find one," says the group coordinator, indicating her 14-year-old son and the longtime volunteer. After for 120 minutes without a single toad sighting, and now they have climbed over a barbed wire fence to inspect beneath some wood.
Family Participation
The mother and son joined the group a while back. The teenager loves all things nature-related and has an ambition to become a conservationist, so his mother started to search for activities they could do together to protect local wildlife. Now she loves it as much as he does, the middle-aged small business owner tells me – so when the team was seeking a new manager recently, she volunteered for the role.
The youth, too, has played an important role in the organization. A clip he created, imploring the local council to close a street through a nature reserve during migration season, swung the decision the team's way. After a year of campaigning, the authority agreed to an "restricted access" restriction between 5pm and 5am from February through to April. The majority of motorists duly avoided the road.
Additional Species and Challenges
A few cars go past when I'm out on patrol and we find some casualties as a consequence – no toads, but three squashed newts. We spot one living newt as well, and the teenager is especially excited to see a harvestman, which moves in his palms. Yet despite the team's hardest attempts to show me a toad, the local population has obviously gone dormant for the winter. It appears that I wouldn't have had any more luck elsewhere in the nation – all the rescue teams I reach out to clarify that it's very difficult at this season.
This team anticipates assisting around ten thousand mature toads over the street
A message I get from another volunteer, who has kindly made the effort to look for toads in a famous site, thought to be the largest accurately monitored toad group in the UK, reaches me with the title: "None found." However, in February and March, he tells me, the group plans to assist around ten thousand mature amphibians across the road.
Impact and Challenges
How much of a difference can these organizations actually make? "The fact that people are performing this consistently on chilly, wet and miserable evenings is quite extraordinary," notes an researcher. "This effort that very much should be celebrated." However, while toad patrols are able to slow the decline, they cannot prevent it entirely – not least because traffic is not the only threat.
Other Dangers
The global warming has resulted in extended spells of dry weather, which create the wrong conditions for some of the creatures that toads consume, such as invertebrates, while higher water temperatures have caused an rise of blue-green algae, which can be harmful to toads. Milder winters also cause toads to wake up from their hibernation more frequently, interfering with the resource preservation vital to their existence. Habitat destruction – particularly the loss of big water bodies – is an additional threat.
Researchers are "always a bit worried about overemphasizing practical benefits on wildlife," however "It's important in just their presence." But toads do have an important role in the food chain, eating pretty much any invertebrates or tiny organisms they can swallow and in turn sustaining a number of predators, such as hedgehogs and otters. Enhancing conditions for toads – ie building water habitats, conserving woodland and constructing toad tunnels – "benefits for a wide range of additional wildlife."
Cultural Significance
An additional motive to work to preserve toads around is their "historical significance," adds an specialist. Myths and folklore around toads go back {centuries|hundred