Will the UK's Common Toads Survive from Roads and Population Collapse?
It's a Friday night at half past seven, but rather than going out 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 dedicated individuals sacrifice their nights to safeguard the local toad population.
An Alarming Decline in Population
The Bufo bufo is becoming increasingly rare. A latest study conducted by an wildlife conservation group showed that the British common toad numbers have almost halved since the mid-1980s. Seeing a creature that has been a fixture of the British countryside in decline is described as "worrying" by researchers. Toads "don't require very particular environments" and "should be able to live quite well in the majority of areas in the UK," meaning if even they are struggling to persist, "it indicates that things are not as they should be."
The UK toad population has almost halved since 1985
The Danger from Roads
Though the research didn't cover the causes for the decline, traffic is a major factor. Estimates suggest that 20 tons of toads are killed on UK roads annually – in other words, several hundred thousand. Unlike frogs, which might be content to mate "if you left out a small container," toads favor big bodies of water. Their capacity to stay out of water for longer than frogs means they can travel further to find them – often long distances. They usually stick to their traditional paths – it's typical for mature amphibians to go back to their birth pond to mate.
Migration Patterns
Fittingly, the first toads begin their quest for a mate around Valentine's day, but others travel as late as April, waiting until it gets dark and moving after sunset. During that period, toads begin migrating from where they have been overwintering "all pretty much at the same time."
A local helper, who was raised in the area and has been trying to protect its amphibians since he was a boy, explains that "They've got just one focus: to go and have an orgy." If their path crosses a street, they could be killed by traffic, and that mating period would be lost – preventing a next generation of toads from being born.
Toad Patrols Across the United Kingdom
Finding hundreds of toad carcasses on local roads "resonates deeply with people," and has led to the formation of rescue teams across the UK – hundreds of organizations are currently registered with a national initiative. These groups collect toads and transport them over streets in containers, as well as counting the number of toads they encounter and advocating for other protection measures, such as blocked roads and underground wildlife tunnels.
Patrols usually work during the migration season, when toad crossings are frequent. However, this implies they can miss groups of toadlets, which, having been eggs and then tadpoles, leave their water habitats over an irregular timetable in late summer. Because of their small stature – just a couple of cm wide – "they can get obliterated by vehicles." 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 remains can be counted.
Year-Round Efforts
In contrast to many groups, one local team, who are in their eighth season of operating, go out throughout the year – not nightly, but whenever weather are warm and wet, or if a member has reported about a toad sighting in their messaging app. When I request to accompany them on duty, they admit it is "not ideal conditions" – toad hibernation season has started and it's been a dry day – but several of the helpers gamely agree to patrol their area with me and see what we can find. "If anyone can find any toads tonight, that pair will spot one," says the group coordinator, indicating her 14-year-old son and the experienced member. We've been out for two hours without a single toad sighting, and now they have scaled a barbed wire fence to inspect beneath some wood.
Community Participation
The mother and son joined the group a while back. The youngster loves all things wildlife and has an goal to become a environmentalist, so his mother started to search for activities they could do together to help native animals. Now she loves it as much as he does, the middle-aged small business owner explains – so when the group was looking for a fresh coordinator recently, she decided to step up.
The teenager, too, has played an important role in the group. A clip he created, imploring the local council to block a street through a nature reserve during migration season, influenced the outcome the team's way. After a year of campaigning, the authority approved an "restricted access" rule between 5pm and 5am from February through to spring. Most drivers duly avoided the route.
Additional Species and Challenges
Several cars go by when I'm out on duty and we find some victims as a result – no amphibians, but several crushed salamanders. We spot one living newt as well, and the teenager is particularly pleased to see a daddy longlegs, which moves in his palms. Yet in spite of the team's hardest attempts to let me see a toad, the local population has clearly settled down for the winter. It seems that I wouldn't have had any better success anywhere else in the country – all the rescue teams I contact clarify that it's near-impossible at this time of year.
This team anticipates assisting around ten thousand mature toads over the street
A message I get from a different helper, who has generously made the effort to look for toads in a famous site, thought to be the largest accurately monitored toad group in the UK, reaches me with the title: "No toads." However, in February and March, he informs me, the group plans to assist approximately ten thousand adult toads across the road.
Effectiveness and Challenges
What level of impact can these organizations actually make? "The reality that volunteers are doing this consistently on cold, damp and unpleasant evenings is remarkable," says an expert. "This effort that very much should be celebrated." However, while toad patrols are able to slow the decline, they can't stop it completely – partly since traffic is just one danger.
Additional Threats
The global warming has resulted in longer periods of drought, which cause the wrong conditions for some of the animals that toads consume, such as invertebrates, while higher water temperatures have led to an increase of blue-green algae, which can be harmful to toads. Warmer cold seasons also cause toads to wake up from their hibernation more frequently, disrupting the energy conservation vital to their existence. Habitat destruction – especially the loss of large ponds – is an additional threat.
Researchers are "always a bit worried about putting too much of a utilitarian spin on biodiversity," however "There is a big value in just their presence." But toads do have an important role in the ecosystem, eating pretty much any invertebrates or tiny organisms they can swallow and in turn feeding a number of birds and mammals, such as hedgehogs and otters. Improving situations for toads – such as creating more ponds, conserving woodland and installing amphibian passages – "benefits for a wide range of additional wildlife."
Historical Significance
Another reason to work to preserve toads present is their "historical significance," adds an specialist. Myths and folklore around toads date back {centuries|hundred