Can Britain's Toads Survive from Roads and Population Collapse?
It is Friday evening at 7:30, but instead of heading to the pub or relaxing at home, I've taken a train to a market town in Wiltshire to meet up with volunteers from a toad patrol. These dedicated individuals give up their evenings to protect the native amphibian community.
An Alarming Decline in Numbers
The common toad is growing more rare. A latest study conducted by an amphibian and reptile charity revealed that the British common toad numbers have almost halved since 1985. Seeing a creature that has been a fixture of the British countryside in decrease is described as "worrying" by researchers. Toads "don't require 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 indicates that the ecosystem is unbalanced."
The UK toad population has almost halved since 1985
The Danger from Traffic
Though the study didn't examine the causes for the decline, cars certainly plays a part. Estimates suggest that 20 tonnes of toads are crushed on British roads annually – in other words, hundreds of thousands. In contrast to frogs, which might be happy to mate "with just a bucket of water," toads prefer large ponds. Their capacity to stay out of water for more time than frogs means they can journey farther to find them – sometimes long distances. They tend to follow their ancestral migration routes – it's common for mature amphibians to go back to their natal pond to mate.
Migration Patterns
Fittingly, the initial amphibians start their journey for a partner around Valentine's day, but others travel as late as spring, waiting until it gets dark and travelling through the night. During that period, toads start moving from where they have been overwintering "almost simultaneously."
A local helper, who grew up 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 crosses a street, they could all get run over, and that mating period would never happen – preventing a next generation of toads from being born.
Toad Patrols Across the United Kingdom
Finding many of dead toads on nearby streets "resonates deeply with people," and has resulted in the formation of toad patrols across the UK – hundreds of organizations are officially listed with a countrywide program. These teams pick up toads and carry them over streets in containers, as well as counting the number of toads they find and lobbying for other protection measures, such as blocked roads and amphibian passages.
Patrols usually work during the breeding period, when toad crossings are frequent. However, this implies they can miss groups of toadlets, which, having existed as spawn and then juveniles, leave their ponds over an irregular timetable in the end of summer. Because of their small stature – just one or two centimetres wide – "they are destroyed by car traffic." And as being run over "basically turns them into mush," it's harder to get data on them. At least when adult toads are lost, their remains can be tallied.
Annual Efforts
In contrast to many groups, one local team, who are in their eighth season of functioning, go out year-round – not nightly, but whenever weather are warm and wet, or if a member has posted about a toad sighting in their messaging app. When I ask to join them on patrol, they concede it is "not a toady night" – winter dormancy has begun and it's been a dry day – but several of the helpers willingly accept to walk up and down their route with me and see what we can find. "Should anyone can find any toads tonight, that pair will spot one," says the group coordinator, pointing to her 14-year-old son and the longtime volunteer. After for two hours without a glimpse of any amphibians, and now they have climbed over a wire barrier to inspect beneath some logs.
Family Participation
The family duo became part of the patrol a year and a half ago. The teenager adores all things nature-related and has an goal to become a environmentalist, so his parent started to look for things they could do jointly to help native animals. Now she enjoys it as much as he does, the middle-aged entrepreneur explains – so when the group was looking for a fresh coordinator lately, she volunteered for the role.
The teenager, too, has played an important role in the organization. A video he created, urging the municipal authority to close a street through a protected area during migration season, influenced the outcome the team's way. After a year of lobbying, the council approved an "restricted access" rule between evening and morning from February through to April. Most drivers duly avoided the route.
Other Wildlife and Difficulties
A few vehicles go past when I'm out on duty and we find some casualties as a result – no toads, but several crushed salamanders. We spot one living newt as well, and the teenager is particularly pleased to see a harvestman, which moves in his palms. Yet in spite of the group's best efforts to show me a toad, the local population has obviously settled down for the winter. It seems that I couldn't have found any better success anywhere else in the country – all the rescue teams I reach out to clarify that it's very difficult at this time of year.
They project rescuing nearly 10,000 grown amphibians during migration
One email I receive 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 population in the UK, arrives in my inbox with the title: "None found." However, in February and March, he informs me, the team expects to help approximately 10,000 adult toads over the street.
Impact and Challenges
How much of a difference can these groups truly achieve? "The fact that people are performing this consistently on chilly, wet and miserable late nights is quite extraordinary," says an expert. "That's something that very much deserves recognition." However, while rescue teams are able to slow the decline, they can't stop it completely – partly since vehicles is not the only threat.
Additional Threats
The global warming has meant longer periods of dry weather, which cause the poor environment for some of the animals that toads eat, such as invertebrates, while warmer ponds have caused an rise of toxic plants, which can be toxic to toads. Milder winters also cause toads to wake up from their hibernation more frequently, interfering with the energy conservation crucial to their life cycle. Habitat destruction – especially the loss of big water bodies – is an additional threat.
Researchers are "often concerned about overemphasizing practical benefits on wildlife," but "There is a big value in just having these animals around." But toads play an significant part in the ecosystem, consuming pretty much any invertebrates or small animals they can swallow and in turn feeding a variety of predators, such as hedgehogs and otters. Improving situations for toads – ie building water habitats, protecting forests and constructing toad tunnels – "we'll improve them for a wide range of additional wildlife."
Cultural Significance
Another reason to try to keep toads around is their "important cultural value," adds an specialist. Legends and tales around toads go back {centuries|hundred