Can Britain's Toads Survive from Traffic and Population Collapse?

It's a Friday night at 7:30, but instead of heading to the pub or watching a film, I've taken a train to a market town in the countryside to meet up with volunteers from a amphibian rescue group. These dedicated individuals give up their evenings to safeguard the native amphibian community.

An Alarming Decline in Numbers

The Bufo bufo is growing more uncommon. A recent research led by an wildlife conservation group showed that the UK toad population have dropped by half since the mid-1980s. Observing a species that has been a fixture of the British countryside in decline is described as "concerning" by researchers. Toads "don't require very specific conditions" and "ought to live quite well in most of areas in the UK," meaning if even they are struggling to persist, "it indicates that the ecosystem is unbalanced."

The UK toad population has almost halved since 1985

The Threat from Traffic

Though the study didn't cover the causes for the decline, cars is a major factor. Estimates indicate that 20 tonnes of toads are killed on UK roads annually – that is, hundreds of thousands. In contrast to frogs, which might be content to mate "with just a bucket of water," 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 – sometimes hundreds of metres. They usually stick to their traditional paths – it's common for adult toads to go back to their natal pond to mate.

Migration Patterns

Appropriately enough, the first toads start their journey for a partner around Valentine's day, but some move as late as spring, waiting until it gets night and moving after sunset. During that period, toads start moving from where they have been hibernating "almost simultaneously."

A local helper, who grew up in the region 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 crosses a street, they could all get run over, and that mating period would never happen – preventing a next generation of toads from being produced.

Rescue Groups Throughout the United Kingdom

Finding hundreds of dead toads on nearby streets "resonates deeply with people," and has resulted in the creation of rescue teams across the UK – 274 groups are currently registered with a national initiative. These teams pick up toads and transport them across roads in buckets, as well as counting the number of toads they find and lobbying for other safety solutions, such as road closures and underground wildlife tunnels.

Volunteers usually work during the migration season, when toad crossings are frequent. However, this implies they can overlook numbers of young toads, which, having existed as spawn and then juveniles, leave their ponds over an irregular timetable in late summer. Because of their small stature – just one or two centimetres wide – "they can get obliterated by vehicles." And as being hit "basically turns them into mush," it's more difficult to get data on them. At least when mature amphibians are killed, their remains can be counted.

Annual Work

Unlike most patrols, one local team, who are in their eighth year of operating, go out throughout the year – not every night, but when weather are damp, or if a member has posted about a toad sighting in their messaging app. When I ask to join 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 helpers willingly accept to walk up and down their area with me and see what we can find. "If anyone can find any toads tonight, that pair will find 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.

Family Involvement

The family duo joined the patrol a year and a half ago. The teenager loves all things nature-related and has an ambition to become a conservationist, so his parent started to look for activities they could do jointly to help native animals. Now she loves it as much as he does, the 41-year-old small business owner explains – so when the group was looking for a new manager recently, she decided to step up.

The teenager, too, has played an important role in the group. A clip he made, urging the local council to close a street through a protected area during breeding time, influenced the outcome the team's way. After a twelve months of campaigning, the council approved an "restricted access" rule between 5pm and 5am from late winter through to spring. The majority of motorists respected and avoided the route.

Additional Species and Challenges

A few cars go by when I'm out on patrol and we discover some victims as a consequence – no amphibians, but three squashed newts. We spot one live amphibian as well, and the teenager is particularly pleased to see a harvestman, which dances in his hands. Yet despite the team's hardest attempts to let me see a toad, the local population has obviously settled down for the colder months. It seems that I couldn't have found any better success elsewhere in the country – all the patrol groups I contact clarify that it's very difficult at this season.

This team anticipates assisting around ten thousand mature toads over the street

One email I receive from another volunteer, who has kindly made the effort to check for toads in a noted location, thought to be 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 plans to assist approximately ten thousand mature amphibians across the road.

Impact and Limitations

What level of impact can these groups truly achieve? "The reality that volunteers are doing this regularly on chilly, wet and miserable evenings is quite extraordinary," says an researcher. "That's something that very much should be celebrated." However, while toad patrols are able to reduce the drop, they cannot prevent it entirely – partly since traffic is not the only threat.

Additional Threats

The climate crisis has meant extended spells of drought, which cause the wrong conditions for some of the animals that toads eat, such as worms and slugs, while warmer ponds have led to an increase of toxic plants, which can be toxic to toads. Warmer cold seasons also lead toads to emerge from their hibernation more frequently, interfering with the resource preservation crucial to their existence. Loss of environment – particularly the loss of large ponds – is an additional threat.

Experts are "always a bit worried about putting too much of a utilitarian spin on wildlife," however "It's important in just their presence." But toads do have an important role in the ecosystem, consuming pretty much any invertebrates or tiny organisms they can fit in their mouths and in turn sustaining a number of predators, such as hedgehogs and otters. Improving situations for toads – ie creating more ponds, conserving woodland and constructing toad tunnels – "we'll improve them for a wide range of other species."

Historical Significance

An additional motive to try to keep toads present is their "historical significance," adds an expert. Myths and folklore around toads go back {centuries|hundred

Donald Nguyen
Donald Nguyen

Elara Vance is a cybersecurity specialist with over a decade of experience in digital forensics and threat analysis.