Will Britain's Toads Survive from Traffic and Population Collapse?
It is a Friday night at 7:30, but rather than going out or watching a film, I've taken a train to a town in the countryside to join volunteers from a amphibian rescue group. These dedicated individuals sacrifice their nights to protect the native amphibian community.
An Alarming Drop in Population
The Bufo bufo is becoming increasingly uncommon. A latest research led by an amphibian and reptile charity revealed that the British common toad numbers have dropped by half since 1985. Observing a species that has been a fixture of the UK landscape in decline is labeled "worrying" by researchers. Toads "don't need very specific conditions" and "should be able to live quite well in the majority of areas in Britain," so if even they are not managing to survive, "it kind of suggests 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 drop, traffic certainly plays a part. Calculations suggest that 20 tonnes of toads are killed on UK roads annually – that is, hundreds of thousands. Unlike frogs, which would probably be happy to mate "with just a small container," toads favor large ponds. Their capacity to remain away from water for longer than frogs means they can journey farther to reach them – often hundreds of metres. They tend to stick to their ancestral migration routes – it's typical for mature amphibians to return to their natal pond to mate.
Migration Patterns
Fittingly, the initial amphibians start their journey for a mate around Valentine's day, but others travel as far as April, until it gets night and moving after sunset. During that time, toads begin migrating from wherever they have been hibernating "all pretty much at the same time."
A local helper, who grew up in the area and has been working to save its toad population since he was a child, notes that "Their sole purpose: to go and have an orgy." If their path happens to a road, they could be killed by traffic, and that breeding season would never happen – stopping a next generation of toads from being born.
Toad Patrols Across the UK
Seeing hundreds of dead toads on nearby streets "inherently strikes a chord with people," and has resulted in the creation of toad patrols throughout the UK – hundreds of organizations are currently registered with a national initiative. These groups pick up toads and transport them across roads in buckets, as well as counting the quantity of toads they encounter and lobbying for other safety solutions, such as road closures and underground wildlife tunnels.
Volunteers tend to operate during the breeding period, when toad crossings are frequent. However, this means they can miss groups of young toads, which, having existed as eggs and then juveniles, exit their water habitats over an unpredictable schedule in late summer. Because of their size – just a couple of cm wide – "they can get obliterated by vehicles." And as being hit "basically turns them into mush," it's harder to get data on them. At least when mature amphibians are killed, their remains can be counted.
Year-Round Work
Unlike most patrols, one local team, who are in their eighth year of functioning, go out throughout the year – not nightly, but when weather are damp, or if someone has reported about a toad sighting in their group chat. When I ask to join them on patrol, they concede it is "not ideal conditions" – winter dormancy has begun and it's been a dry day – but a few of the helpers willingly accept to patrol 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, pointing to 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 climbed over a barbed wire fence to check under some logs.
Family Involvement
The mother and son joined the patrol a year and a half ago. The youngster loves all things nature-related and has an ambition to become a environmentalist, so his mother started to search for activities they could do together to protect native animals. Now she loves it as much as he does, the 41-year-old small business owner tells me – so when the team was looking for a new manager lately, she volunteered for the role.
The teenager, too, has played an important role in the organization. A video he created, urging the local council to close a street through a nature reserve during breeding time, swung the decision the team's way. After a year of lobbying, the authority agreed to an "access-only" restriction between evening and morning from February through to spring. Most drivers duly avoided the route.
Additional Species and Challenges
A few vehicles go by when I'm out on duty and we discover some casualties as a consequence – no amphibians, but several crushed salamanders. We spot one living newt as well, and the youngster is especially excited to see a daddy longlegs, which moves 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 seems that I wouldn't have had any more luck anywhere else in the country – all the rescue teams I contact clarify that it's very difficult at this time of year.
This team anticipates assisting around ten thousand mature toads over the street
A message I get from a different helper, who has kindly taken the trouble to check for toads in a noted location, thought to be the biggest tracked toad population in the UK, reaches me with the subject line: "No toads." However, in late winter, he tells me, the team expects to help around 10,000 adult toads 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 cold, damp and unpleasant evenings is remarkable," says an researcher. "That's something that very much deserves recognition." However, while toad patrols are able to slow the decline, they can't stop it completely – partly since traffic is just one danger.
Additional Threats
The global warming has meant longer periods of drought, which cause the wrong conditions for some of the creatures that toads consume, such as worms and slugs, while warmer ponds have led to an increase of blue-green algae, which can be harmful to toads. Warmer cold seasons also lead toads to emerge from their hibernation more often, interfering with the resource preservation vital to their life cycle. Loss of environment – especially the disappearance of big water bodies – is an additional threat.
Researchers are "always a bit worried about putting too much of a utilitarian spin on biodiversity," but "There is a big value in just having these animals around." But toads do have an important role in the food chain, consuming pretty much any invertebrates or small animals they can fit in their mouths and in turn sustaining a variety of predators, such as hedgehogs and otters. Improving conditions for toads – such as building water habitats, protecting forests and installing amphibian passages – "benefits for a whole bunch of other species."
Cultural Significance
Another reason to work to preserve toads present is their "important cultural value," notes an expert. Myths and folklore around toads go back {centuries|hundred