Can the UK's Toads Survive from Roads and Population Collapse?
It is Friday evening at 7:30, but rather than going out or watching a film, I've caught a train to a market town in the countryside to meet up with local helpers from a amphibian rescue group. These dedicated individuals sacrifice their evenings to safeguard the native amphibian community.
A Worrying Decline in Population
The Bufo bufo is growing more rare. A latest study led by an amphibian and reptile charity showed that the UK toad population have dropped by half since the mid-1980s. Seeing a species that has been a stalwart of the British countryside in decline is labeled "worrying" by researchers. Toads "don't need very particular environments" and "should be able to live successfully in most of areas in the UK," 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 Threat from Traffic
Though the research didn't examine the causes for the decline, traffic certainly plays a part. Estimates suggest that 20 tonnes of toads are crushed on British roads annually – in other words, several hundred thousand. Unlike frogs, which might be happy to mate "if you left out a bucket of water," toads prefer big bodies of water. Their ability to remain away from 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 adult toads to return to their natal pond to mate.
Migration Patterns
Fittingly, the first toads begin their quest for a partner around Valentine's day, but some move as late as April, until it gets night and moving after sunset. During that time, toads begin migrating from wherever they have been overwintering "almost simultaneously."
One volunteer, who was raised in the area and has been trying to protect its toad population since he was a boy, explains that "Their sole purpose: to go and mate." If their route happens to a road, they could all get run over, and that breeding season would never happen – preventing a next generation of toads from being born.
Toad Patrols Throughout the United Kingdom
Finding hundreds of toad carcasses on local roads "inherently strikes a chord with people," and has led to the formation of rescue teams across the UK – 274 groups are officially listed with a countrywide program. These teams collect toads and carry them across roads in containers, as well as counting the quantity of toads they encounter and lobbying for other safety solutions, such as road closures and amphibian passages.
Volunteers tend to operate during the migration season, when toad crossings are more regular. However, this means they can miss numbers of toadlets, which, having been spawn and then tadpoles, exit their ponds over an unpredictable schedule in the end of summer. Because of their small stature – just one or two centimetres wide – "they can get obliterated by vehicles." And as being run over "essentially crushes them," it's harder to get data on them. At least when mature amphibians are lost, their carcasses can be tallied.
Annual Work
Unlike most patrols, 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 amphibian spotting 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 a few of the volunteers willingly accept to walk up and down 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 14-year-old son and the experienced member. After for 120 minutes without a single toad sighting, and now they have scaled a wire barrier to check under some logs.
Family Involvement
The family duo became part of the group a while back. The teenager adores all things wildlife and has an ambition to become a environmentalist, so his mother started to look for activities they could do jointly to protect local wildlife. Now she loves it as much as he does, the middle-aged entrepreneur explains – so when the team was seeking a fresh coordinator lately, she volunteered for the role.
The youth, too, has been instrumental in the organization. A video he created, imploring the local council to block a street through a protected area during breeding time, influenced the outcome the group's way. After a twelve months of campaigning, the authority approved an "access-only" restriction between 5pm and 5am from February through to spring. Most drivers duly avoided the road.
Other Wildlife and Challenges
Several vehicles go by when I'm out on duty and we find some casualties as a consequence – no amphibians, but several crushed salamanders. We see one live amphibian as well, and the youngster is especially excited to see a harvestman, which moves in his hands. Yet in spite of the group's best efforts to show me a toad, the local population has obviously gone dormant for the colder months. It seems that I wouldn't have had any better success elsewhere in the nation – all the patrol groups I reach out to clarify that it's near-impossible at this time of year.
This team anticipates assisting around ten thousand mature toads over the street
One email I get from another volunteer, who has kindly taken the trouble to check for toads in a famous site, considered the largest accurately monitored toad group in the UK, reaches me with the title: "None found." However, in late winter, he tells me, the group expects to help approximately ten thousand adult toads across the road.
Effectiveness and Challenges
How much of a difference can these groups truly achieve? "The fact that volunteers are doing this regularly on cold, damp and unpleasant evenings is quite extraordinary," says an expert. "That's something that very much should be celebrated." However, while rescue teams are able to slow the decline, they cannot prevent it entirely – partly since traffic is not the only threat.
Other Dangers
The climate crisis has resulted in extended spells of dry weather, which create the wrong conditions for some of the creatures that toads consume, such as worms and slugs, while warmer ponds have caused an rise of blue-green algae, which can be harmful to toads. Milder winters also lead toads to emerge from their hibernation more often, disrupting the energy conservation crucial to their existence. Loss of environment – especially the loss of big water bodies – is an additional threat.
Researchers are "often concerned about overemphasizing practical benefits on biodiversity," however "There is a big value in just their presence." But toads do have an important role in the ecosystem, eating almost any invertebrates or small animals they can fit in their mouths and in turn feeding a variety of birds and mammals, such as hedgehogs and otters. Enhancing situations for toads – such as building water habitats, protecting forests and installing toad tunnels – "we'll improve them for a whole bunch of other species."
Historical Importance
Another reason to work to preserve toads present is their "historical significance," notes an specialist. Myths and folklore around toads date back {centuries|hundred