Can Britain's Toads Survive from Roads and Population Collapse?
It is a Friday evening at 7:30, but rather than going out or watching a film, I've taken a train to a town in Wiltshire to meet up with volunteers from a toad patrol. These committed people sacrifice their nights to safeguard the native amphibian community.
A Worrying Decline in Population
The Bufo bufo is growing more rare. A recent research conducted by an amphibian and reptile charity showed that the British common toad numbers have dropped by half since the mid-1980s. Observing a species that has been a stalwart of the British countryside in decrease is labeled "worrying" by researchers. Toads "don't need very particular environments" and "ought to live successfully in the majority of areas in the UK," so if even they are struggling to persist, "it indicates that things are not as they should be."
Toad populations across the UK have declined by almost 50% since the 1980s
The Threat from Roads
Though the study didn't examine the reasons for the decline, traffic is a major factor. Estimates suggest that 20 tons of toads are killed on UK roads every year – that is, several hundred thousand. In contrast to frogs, which would probably be happy to mate "with just a small container," toads prefer large ponds. Their ability to remain away from water for more time than frogs allows they can travel further to find 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 Habits
Fittingly, the initial amphibians start their journey for a partner around February 14th, but some move as late as spring, waiting until it gets dark and moving after sunset. During that period, toads start moving from where they have been overwintering "all pretty much at the same time."
A local helper, who grew up in the area 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 path crosses a road, they could all get run over, and that breeding season would never happen – preventing a new generation of toads from being produced.
Rescue Groups Across the United Kingdom
Seeing many of toad carcasses on local roads "inherently strikes a chord with people," and has led to the creation of rescue teams across the UK – hundreds of organizations are currently registered with a national initiative. These teams pick up toads and carry them across roads in buckets, as well as recording the number of toads they find and advocating for other safety solutions, such as road closures and amphibian passages.
Volunteers usually work during the breeding period, when toad crossings are frequent. However, this implies they can overlook groups of young toads, which, having existed as eggs and then juveniles, leave their ponds over an unpredictable schedule 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 hit "essentially crushes them," it's more difficult to collect information on them. At least when mature amphibians are lost, their remains can be tallied.
Year-Round Work
In contrast to most patrols, one local team, who are in their eighth year of functioning, go out year-round – not nightly, but whenever weather are damp, 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 started and it's been a arid period – but several of the helpers gamely agree to patrol their area with me and search for any toads. "Should anyone can find any toads tonight, those two will find one," says the patrol manager, pointing to her teenage child and the longtime volunteer. We've been out for two hours without a single toad sighting, and now they have scaled a wire barrier to inspect beneath some logs.
Community Involvement
The mother and son joined the group a year and a half ago. The teenager loves all things nature-related and has an ambition to become a environmentalist, so his mother started to search for things they could do together to help local wildlife. Now she enjoys it as much as he does, the 41-year-old entrepreneur explains – so when the group was looking for a new manager recently, she volunteered for the role.
The teenager, too, has been instrumental in the organization. A clip he made, imploring the municipal authority to close a road through a nature reserve during migration season, influenced the outcome the group's way. After a year of campaigning, the council agreed to an "restricted access" restriction between 5pm and 5am from February through to spring. The majority of motorists duly avoided the road.
Other Wildlife and Difficulties
Several vehicles go by when I'm out on duty and we discover some casualties as a result – no amphibians, but several crushed salamanders. We see one live amphibian as well, and the youngster is particularly pleased to see a daddy longlegs, which moves in his hands. Yet despite the group's hardest attempts to let me see a toad, the local population has obviously settled down for the colder months. It seems that I wouldn't have had any better success anywhere else in the nation – all the patrol groups I contact explain that it's very difficult at this time of year.
The group expects to help approximately 10,000 adult toads across the road
A message I receive from a different helper, who has generously made the effort to check for toads in a noted location, thought to be the biggest tracked toad group in the UK, arrives in my inbox with the title: "No toads." However, in February and March, he tells me, the team expects to help approximately ten thousand adult toads over the street.
Effectiveness and Limitations
How much of a difference can these groups truly achieve? "The fact that volunteers are performing this regularly on chilly, wet and miserable late nights is remarkable," notes an researcher. "This effort that very much deserves recognition." However, while toad patrols are able to slow the decline, they cannot prevent it entirely – partly since vehicles is just one danger.
Other Dangers
The global warming has meant longer periods of dry weather, which cause the wrong conditions for some of the animals that toads consume, such as invertebrates, while warmer ponds have led to an increase of toxic plants, which can be harmful to toads. Warmer cold seasons also lead toads to emerge from their hibernation more often, interfering with the energy conservation crucial to their existence. Loss of environment – particularly the loss of big water bodies – is an additional threat.
Experts are "always a bit worried about overemphasizing practical benefits on biodiversity," however "It's important in just having these animals around." But toads do have an significant part in the ecosystem, eating pretty much any small creatures or tiny organisms they can swallow and in turn sustaining a number of birds and mammals, such as wildlife. Enhancing situations for toads – ie creating more ponds, conserving woodland and constructing amphibian passages – "we'll improve them for a whole bunch of other species."
Cultural Significance
Another reason to try to keep toads present is their "important cultural value," notes an specialist. Legends and tales around toads date back {centuries|hundred