Will the UK's Toads Survive from Traffic and Population Collapse?
It's Friday evening at half past seven, but instead of 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 committed people give up their evenings to protect the native amphibian community.
A Worrying Decline in Numbers
The Bufo bufo is growing more rare. A latest research led by an amphibian and reptile charity revealed that the UK toad population have almost halved since 1985. Seeing a species that has been a fixture of the UK landscape in decline is described as "worrying" by researchers. Toads "don't require very specific conditions" and "should be able to live quite well in most of areas in Britain," so if even they are not managing to survive, "it indicates that things are not as they should be."
Since 1985, Britain's toad numbers have nearly been cut in half
The Threat from Traffic
Though the research didn't cover the causes for the decline, traffic is a major factor. Calculations indicate that 20 tons of toads are killed on UK roads every year – in other words, several hundred thousand. Unlike frogs, which might be content to mate "if you left out a bucket of water," toads prefer large ponds. Their capacity to stay out of water for more time than frogs allows they can journey farther to reach them – often hundreds of metres. They tend to follow their traditional paths – it's common for mature amphibians 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 dark and moving after sunset. During that period, toads start moving from wherever they have been overwintering "almost simultaneously."
A local helper, who was raised in the region and has been working to save its toad population since he was a child, explains that "Their sole purpose: to go and mate." If their route happens to a street, they could all get run over, and that mating period would be lost – preventing a next generation of toads from being born.
Rescue Groups Throughout the United Kingdom
Finding hundreds of toad carcasses on local roads "resonates deeply with people," and has resulted in the formation of toad patrols throughout the UK – 274 groups are officially listed with a national initiative. These teams collect toads and carry them over streets in containers, as well as counting the number of toads they find and advocating for other safety solutions, such as road closures and amphibian passages.
Patrols tend to operate during the migration season, when toad crossings are more regular. However, this implies they can overlook numbers of young toads, which, having been eggs and then tadpoles, leave their water habitats over an unpredictable schedule 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 "essentially crushes them," it's more difficult to collect information on them. At least when adult toads are killed, their remains can be counted.
Year-Round Efforts
In contrast to many groups, one local team, who are in their eighth season of functioning, go out throughout the year – not nightly, but whenever conditions are warm and wet, or if someone has reported about a toad sighting in their group chat. When I ask to join them on duty, they concede it is "not a toady night" – toad hibernation season has begun and it's been a dry day – but several of the helpers willingly accept to patrol their route with me and search for any toads. "If anyone can locate any toads tonight, that pair will spot one," says the group coordinator, 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.
Community Involvement
The family duo joined the patrol a year and a half ago. The youngster loves all things nature-related and has an ambition to become a conservationist, so his parent started to search for activities they could do together to protect native animals. Now she enjoys it as much as he does, the 41-year-old entrepreneur tells me – so when the team was seeking a fresh coordinator lately, she volunteered for the role.
The teenager, too, has played an important role in the organization. A clip he made, imploring the municipal authority to close a street through a protected area during migration season, swung the decision the group's way. After a twelve months of lobbying, the council agreed to an "restricted access" rule between 5pm and 5am from late winter through to spring. Most drivers respected and avoided the road.
Additional Species and Challenges
A few cars go by when I'm out on patrol and we discover some casualties as a consequence – no amphibians, but three squashed newts. 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 let me see a toad, the local population has clearly gone dormant for the winter. It appears that I couldn't have found any better success anywhere else in the country – all the patrol groups 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
A message I get from another volunteer, who has generously made the effort to look for toads in a famous site, thought to be the biggest tracked toad population in the UK, arrives in my inbox with the title: "No toads." However, in February and March, he informs me, the group plans to assist approximately 10,000 mature amphibians over the street.
Impact and Limitations
How much of a difference can these organizations truly achieve? "The reality that volunteers are performing this consistently on chilly, wet and miserable late nights is quite extraordinary," says an researcher. "This effort that very much deserves recognition." However, while rescue teams are able to reduce the drop, they can't stop it completely – not least because vehicles is just one danger.
Additional Threats
The climate crisis has resulted in longer periods of drought, which cause the wrong conditions for some of the animals that toads eat, such as invertebrates, while higher water temperatures have caused an rise of blue-green algae, which can be harmful to toads. Warmer cold seasons also lead toads to wake up from their hibernation more often, disrupting the energy conservation vital to their life cycle. Loss of environment – particularly the disappearance of big water bodies – is an additional threat.
Researchers are "always a bit worried about overemphasizing practical benefits on wildlife," but "There is a big value in just their presence." But toads do have an significant part in the food chain, eating almost any invertebrates or small animals they can fit in their mouths and in turn feeding a number of predators, such as hedgehogs and otters. Improving conditions for toads – such as creating more ponds, protecting forests and installing toad tunnels – "we'll improve them for a wide range of additional wildlife."
Historical Significance
Another reason to work to preserve toads around is their "important cultural value," notes an specialist. Legends and tales around toads date back {centuries|hundred