Can Britain's Common Toads Survive from Traffic and Population Collapse?
It's a Friday night at 7:30, but instead of going out or relaxing at home, I've caught a train to a market town in the countryside to join volunteers from a amphibian rescue group. These dedicated individuals sacrifice their evenings to safeguard the local toad population.
A Worrying Drop in Population
The common toad is becoming increasingly rare. A latest research led by an amphibian and reptile charity showed that the British common toad numbers have almost halved since the mid-1980s. Observing a species that has been a stalwart of the British countryside in decline is described as "concerning" by experts. Toads "don't require very specific conditions" and "should be able to live quite well in the majority of areas in Britain," meaning if even they are not managing to survive, "it kind of suggests that things are not as they should be."
Toad populations across the UK have declined by almost 50% since the 1980s
The Danger from Traffic
Though the research didn't examine the reasons for the decline, traffic certainly plays a part. Calculations suggest that 20 tons of toads are crushed on British roads every year – in other words, several hundred thousand. Unlike frogs, which might be content to mate "if you left out a small container," toads favor large ponds. Their capacity to remain away from water for longer than frogs means they can travel further to reach them – often hundreds of metres. They usually stick to their traditional paths – it's common for mature amphibians to go back to their natal pond to mate.
Migration Patterns
Appropriately enough, the first toads begin their quest for a partner around Valentine's day, but some move as far as April, waiting until it gets dark and travelling after sunset. During that period, toads begin migrating from wherever they have been overwintering "almost simultaneously."
One volunteer, who grew up in the area and has been working to save its amphibians since he was a child, explains that "Their sole purpose: to go and have an orgy." If their path happens to a road, they could all get run over, and that mating period would never happen – stopping a new generation of toads from being produced.
Rescue Groups Throughout the United Kingdom
Seeing many of dead toads on nearby streets "inherently strikes a chord with people," and has led to the creation of toad patrols across the UK – hundreds of organizations are officially listed with a countrywide program. These groups collect toads and transport them over streets in buckets, as well as counting the quantity of toads they find and lobbying for other safety solutions, such as blocked roads and underground wildlife tunnels.
Patrols tend to operate during the migration season, when toad crossings are frequent. However, this means they can overlook numbers of young toads, which, having existed as eggs and then juveniles, exit their ponds over an unpredictable schedule in late summer. Because of their small stature – just one or two centimetres wide – "they are destroyed by car traffic." And as being hit "basically turns them into mush," it's harder to get data on them. At least when mature amphibians are lost, their remains can be counted.
Annual Efforts
Unlike most patrols, one local team, who are in their eighth season of operating, go out year-round – not every night, but whenever conditions are warm and wet, or if a member has posted about a toad sighting in their group chat. When I request to accompany them on patrol, they concede it is "not a toady night" – winter dormancy has begun and it's been a arid period – but several of the volunteers willingly accept to patrol their route with me and see what we can find. "Should anyone can locate any toads tonight, that pair will spot one," says the patrol manager, indicating her 14-year-old son and the longtime volunteer. We've been out for two hours without a glimpse of any amphibians, and now they have climbed over a barbed wire fence to inspect beneath some logs.
Family Involvement
The mother and son joined the group a while back. The youngster loves all things nature-related and has an goal to become a conservationist, so his parent started to look for activities they could do together to help local wildlife. Now she loves it as much as he does, the middle-aged small business owner tells me – so when the group was seeking a fresh coordinator lately, she volunteered for the role.
The youth, too, has played an important role in the group. A clip he made, imploring the municipal authority to close a road through a protected area during migration season, influenced the outcome the team's way. After a year of campaigning, the authority approved an "restricted access" rule between evening and morning from February through to spring. Most drivers respected and avoided the road.
Additional Species and Difficulties
Several vehicles go by when I'm out on patrol and we discover some casualties as a consequence – no amphibians, but several crushed salamanders. We see one live amphibian as well, and the teenager is especially excited to see a harvestman, which dances in his hands. Yet in spite of the group's best efforts to let me see a toad, the native community has obviously gone dormant for the colder months. It appears that I couldn't have found any better success anywhere else 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 get from another volunteer, who has generously taken the trouble to look for toads in a famous site, thought to be the largest accurately monitored toad group in the UK, arrives in my inbox with the title: "None found." However, in February and March, he informs me, the team plans to assist approximately 10,000 mature amphibians over the street.
Impact and Limitations
How much of a difference can these groups truly achieve? "The fact that volunteers are doing this consistently on chilly, wet and miserable evenings is remarkable," says an expert. "This effort that very much should be celebrated." However, while rescue teams are able to slow the decline, they can't stop it completely – partly since vehicles is just one danger.
Other Dangers
The climate crisis has meant longer periods of drought, which create the poor environment for some of the animals that toads eat, such as worms and slugs, while higher water temperatures have caused an increase of blue-green algae, which can be harmful to toads. Warmer cold seasons also lead toads to emerge from their dormancy more frequently, disrupting the resource preservation vital to their life cycle. Loss of environment – especially the disappearance of large ponds – is another menace.
Experts are "often concerned about overemphasizing practical benefits on wildlife," but "There is a big value in just their presence." But toads play an significant part in the ecosystem, consuming almost any invertebrates or tiny organisms they can swallow and in turn feeding a number of predators, such as hedgehogs and otters. Improving situations for toads – such as building water habitats, conserving woodland and installing toad tunnels – "benefits for a wide range of additional wildlife."
Historical Significance
Another reason to try to keep toads present is their "important cultural value," notes an expert. Legends and tales around toads go back {centuries|hundred