Can the UK's Toads Survive from Traffic and Population Collapse?
It is Friday evening at half past seven, but rather than heading to the pub or relaxing at home, I've taken a train to a market town in the countryside to meet up with local helpers from a amphibian rescue group. These committed people sacrifice their nights to protect the native amphibian community.
A Worrying Decline in Population
The common toad is growing more uncommon. A recent study led by an amphibian and reptile charity showed that the British common toad numbers have almost halved since the mid-1980s. Seeing a species that has been a stalwart of the UK landscape in decline is labeled "concerning" by researchers. Toads "don't require very specific conditions" and "ought to live quite well in the majority of areas in the UK," 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 Threat from Traffic
Though the research didn't examine the reasons for the decline, cars is a major factor. Calculations suggest that 20 tonnes of toads are crushed on British roads annually β in other words, hundreds of thousands. In contrast to frogs, which might be happy to mate "if you left out a bucket of water," toads favor large ponds. Their ability to stay out of water for longer than frogs means they can travel further to reach them β sometimes long distances. They usually follow their traditional paths β it's common for adult toads to go back to their natal pond to mate.
Breeding Patterns
Appropriately enough, the initial amphibians begin their quest for a mate around February 14th, but some move as far as April, waiting until it gets night and moving through the night. During that period, toads begin migrating from where they have been hibernating "almost simultaneously."
One volunteer, who was raised in the area and has been trying to protect its amphibians since he was a boy, notes that "They've got just one focus: to go and have an orgy." If their path happens to a road, they could all get run over, and that breeding season would be lost β stopping a new generation of toads from being produced.
Rescue Groups Across the United Kingdom
Seeing hundreds of toad carcasses on local roads "resonates deeply with people," and has resulted in the creation of rescue teams across the UK β hundreds of organizations are officially listed with a countrywide program. These teams collect toads and transport them across roads in buckets, as well as recording the number of toads they encounter and lobbying for other protection measures, such as blocked roads and amphibian passages.
Patrols usually work during the breeding period, when toad crossings are more regular. However, this implies they can miss numbers of toadlets, which, having existed as eggs and then tadpoles, exit their ponds over an unpredictable schedule in the end of summer. Because of their small stature β just a couple of cm wide β "they are destroyed by vehicles." And as being hit "basically turns them into mush," it's more difficult to get data on them. At least when adult toads are killed, their remains can be tallied.
Year-Round Work
In contrast to many groups, one local team, who are in their eighth season of operating, go out throughout the year β not every night, but when weather are warm and wet, or if a member has posted about a amphibian spotting in their group chat. When I ask to join them on duty, they concede it is "not ideal conditions" β winter dormancy has started and it's been a arid period β but a few of the helpers gamely agree to patrol their area with me and see what we can find. "Should anyone can find any toads tonight, that pair will spot one," says the patrol manager, pointing to her teenage child and the experienced member. We've been out for two hours without a single toad sighting, and now they have climbed over a barbed wire fence to inspect beneath some logs.
Family Participation
The mother and son became part of the group a year and a half ago. The teenager adores all things nature-related and has an goal to become a conservationist, so his parent started to search for things they could do together to protect native animals. Now she loves it as much as he does, the middle-aged small business owner explains β so when the group was looking for a new manager lately, she volunteered for the role.
The teenager, too, has been instrumental in the organization. A clip he made, urging the municipal authority to close a street through a protected area during breeding time, swung the decision the group's way. After a year of campaigning, the council approved an "access-only" restriction between 5pm and 5am from late winter through to spring. Most drivers respected and avoided the route.
Other Wildlife and Difficulties
Several vehicles go by when I'm out on patrol and we discover some victims as a consequence β no amphibians, but several crushed salamanders. We see one living newt as well, and the youngster is particularly pleased to see a harvestman, which moves in his palms. Yet despite the group's hardest attempts to show me a toad, the native community has clearly gone dormant for the colder months. It appears that I wouldn't have had any more luck elsewhere in the country β 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 kindly 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: "None found." However, in late winter, he informs me, the group plans to assist around 10,000 mature amphibians across the road.
Impact and Limitations
How much of a difference can these groups actually make? "The fact that volunteers are performing this regularly 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 β not least because vehicles is just one danger.
Other Dangers
The climate crisis has meant extended spells of dry weather, which cause the poor environment for some of the creatures that toads eat, such as worms and slugs, while higher water temperatures have led to an increase of toxic plants, which can be harmful to toads. Warmer cold seasons also cause toads to emerge from their dormancy more often, disrupting the energy conservation crucial to their existence. Loss of environment β especially the disappearance of large ponds β is an additional threat.
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, eating pretty much any small creatures or tiny organisms they can swallow and in turn feeding a number of birds and mammals, such as wildlife. Improving conditions for toads β ie creating more ponds, protecting forests and constructing toad tunnels β "we'll improve them for a whole bunch of other species."
Cultural Importance
An additional motive to try to keep toads present is their "important cultural value," adds an specialist. Legends and tales around toads go back {centuries|hundred