Will Britain's Toads Survive from Roads and Population Collapse?
It's a Friday night at half past seven, but instead of 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 give up their nights to protect the local toad population.
An Alarming Decline in Population
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 dropped by half since the mid-1980s. Observing a species that has been a fixture of the UK landscape in decline is described as "worrying" by researchers. Toads "don't require very specific conditions" and "ought to live quite well in most of habitats in the UK," so if even they are struggling to persist, "it indicates that things are not as they should be."
Since 1985, Britain's toad numbers have nearly been cut in half
The Danger from Roads
Though the study didn't cover the reasons for the drop, traffic certainly plays a part. Estimates suggest that 20 tons of toads are crushed on UK roads every year – in other words, several hundred thousand. Unlike frogs, which would probably be happy to mate "if you left out a small container," toads favor big bodies of water. Their ability to stay out of water for more time than frogs allows 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
Appropriately enough, the initial amphibians begin their quest for a mate around Valentine's day, but some move as far as spring, waiting until it gets night and moving after sunset. During that period, toads begin migrating from where they have been hibernating "all pretty much at the same time."
A local helper, who grew up in the region and has been working to save its toad population since he was a boy, explains that "They've got just one focus: to go and have an orgy." If their route crosses a road, they could be killed by traffic, and that mating period would be lost – stopping a next generation of toads from being born.
Rescue Groups Across the United Kingdom
Seeing many of toad carcasses on local roads "resonates deeply with people," and has led to the formation of rescue teams throughout the UK – 274 groups are officially listed with a national initiative. These groups pick up toads and carry them across roads in containers, as well as recording the quantity of toads they find and advocating for other safety solutions, such as blocked roads and amphibian passages.
Patrols tend to operate during the breeding period, when toad crossings are frequent. However, this means they can miss groups of young toads, which, having existed as eggs and then tadpoles, leave their water habitats over an unpredictable schedule in late summer. Because of their size – just a couple of cm wide – "they can get obliterated by car traffic." And as being run over "basically turns them into mush," it's more difficult to get data on them. At least when mature amphibians are lost, their carcasses can be counted.
Annual Work
Unlike most patrols, one local team, who are in their eighth season of operating, go out throughout the year – not every night, but when conditions are damp, or if someone has reported about a amphibian spotting in their group chat. When I ask to join them on duty, they admit it is "not ideal conditions" – toad hibernation season has started and it's been a arid period – but several of the volunteers willingly accept to patrol their area with me and search for any toads. "If anyone can find any toads tonight, those two will spot one," says the patrol manager, pointing to her 14-year-old son and the longtime volunteer. We've been out for 120 minutes without a glimpse of any amphibians, and now they have climbed over a wire barrier to inspect beneath some logs.
Family Participation
The mother and son became part of the group a while back. The youngster adores all things nature-related and has an ambition to become a conservationist, so his mother started to look for things they could do jointly to help local wildlife. Now she enjoys it as much as he does, the 41-year-old entrepreneur tells me – so when the team was looking for a fresh coordinator recently, she decided to step up.
The youth, too, has been instrumental in the group. A clip he created, urging the municipal authority to block a street through a nature reserve during breeding time, influenced the outcome the group's way. After a twelve months of campaigning, the council agreed to an "access-only" restriction between 5pm and 5am from late winter through to spring. The majority of motorists duly avoided the route.
Additional Species and Difficulties
Several cars go past when I'm out on duty and we find some victims as a consequence – no toads, but several crushed salamanders. We see one live amphibian as well, and the teenager is particularly pleased to see a daddy longlegs, which dances in his palms. Yet despite the group's best efforts to show me a toad, the native community has obviously settled down for the colder months. It seems that I couldn't have found any more luck anywhere else in the nation – 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
A message I get from a different helper, who has generously taken the trouble to look for toads in a famous site, considered the largest accurately monitored toad population in the UK, reaches me with the title: "No toads." However, in late winter, he informs me, the team expects to help around ten thousand mature amphibians across the road.
Effectiveness and Limitations
How much of a difference can these organizations truly achieve? "The reality that volunteers are doing this consistently on cold, damp and unpleasant evenings is remarkable," says an researcher. "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 just one danger.
Additional Threats
The climate crisis has meant longer periods of dry weather, which create the wrong conditions for some of the creatures that toads eat, such as invertebrates, while warmer ponds have led to an rise of blue-green algae, which can be toxic to toads. Milder winters also cause toads to emerge from their dormancy more frequently, interfering with the energy conservation vital to their life cycle. Habitat destruction – particularly the loss of large ponds – is another menace.
Researchers are "often concerned about putting too much of a utilitarian spin on biodiversity," but "There is a big value in just their presence." But toads play an important role in the food chain, eating almost any invertebrates or tiny organisms they can fit in their mouths and in turn feeding a number of birds and mammals, such as wildlife. Improving conditions for toads – such as creating more ponds, conserving woodland and constructing amphibian passages – "benefits for a wide range of additional wildlife."
Cultural Significance
Another reason to try to keep toads around is their "important cultural value," notes an specialist. Legends and tales around toads date back {centuries|hundred