Will the UK's Toads Survive from Roads and Population Collapse?
It is Friday evening at 7:30, but instead of going out or relaxing at home, I've taken a train to a market town in Wiltshire to join local helpers from a amphibian rescue group. These dedicated individuals give up their nights to protect the native amphibian community.
An Alarming Drop in Population
The Bufo bufo is becoming increasingly rare. A recent research led by an wildlife conservation group revealed that the British common toad numbers have almost halved since the mid-1980s. Observing a species that has been a stalwart of the UK landscape in decline is described as "worrying" by researchers. Toads "don't require very particular environments" and "ought to live quite well in the majority of areas in Britain," meaning if even they are struggling to persist, "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 Danger from Roads
Though the study didn't cover the causes for the decline, cars is a major factor. Calculations indicate that 20 tonnes of toads are crushed on UK roads every year – in other words, hundreds of thousands. Unlike frogs, which might be happy to mate "if you left out a bucket of water," toads prefer large ponds. Their ability to remain away from water for more time than frogs means they can journey farther to find them – often hundreds of metres. They usually stick to their traditional paths – it's common for mature amphibians to go back to their natal pond to mate.
Migration Habits
Appropriately enough, the initial amphibians begin their quest for a mate around February 14th, but others travel as late as spring, until it gets dark and travelling through the night. During that period, toads begin migrating from wherever they have been hibernating "all pretty much at the same time."
One volunteer, who was raised in the area and has been trying to protect its toad population since he was a boy, explains that "They've got just one focus: to go and have an orgy." If their path crosses a road, they could be killed by traffic, and that breeding season would never happen – stopping a new generation of toads from being produced.
Toad Patrols Across the United Kingdom
Finding hundreds of toad carcasses on nearby streets "resonates deeply with people," and has led to the formation of toad patrols throughout the UK – hundreds of organizations are officially listed with a national initiative. These groups pick up toads and carry them over streets in buckets, as well as recording the number of toads they encounter and lobbying 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 young toads, which, having existed as eggs and then juveniles, leave their water habitats over an irregular timetable in the end of summer. Because of their small stature – just one or two centimetres wide – "they can get obliterated by car traffic." And as being hit "essentially crushes them," it's more difficult to collect information on them. At least when adult toads are lost, their remains can be counted.
Annual Efforts
In contrast to many groups, a specific volunteer group, who are in their eighth season of functioning, go out throughout the year – not nightly, but whenever conditions are damp, or if someone has posted about a amphibian spotting in their group chat. When I request to accompany them on duty, they admit it is "not a toady night" – winter dormancy has begun and it's been a arid period – but a few of the helpers gamely agree to walk up and down their area with me and search for any toads. "If anyone can find any toads tonight, that pair will spot one," says the group coordinator, pointing to her 14-year-old son and the experienced member. 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 Involvement
The family duo became part of the group a while back. The youngster adores all things wildlife and has an ambition to become a conservationist, so his parent 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 entrepreneur explains – so when the group was looking for a new manager lately, she volunteered for the role.
The teenager, too, has played an important role in the group. A clip he created, imploring the local council to block a road through a protected area during migration season, influenced the outcome the team's way. After a year of lobbying, the council approved an "restricted access" rule between evening and morning from late winter through to April. The majority of motorists duly avoided the route.
Additional Species and Challenges
Several vehicles go by when I'm out on patrol and we find some victims as a consequence – no toads, but several crushed salamanders. We spot one live amphibian as well, and the teenager is particularly pleased to see a harvestman, which moves in his hands. Yet despite the group's hardest attempts to show me a toad, the local population has clearly settled down for the colder months. It appears that I couldn't have found any better success elsewhere in the country – all the patrol groups I reach out to explain that it's very difficult at this time of year.
This team anticipates assisting around ten thousand mature toads over the street
A message I get from another volunteer, who has generously taken the trouble to look for toads in a noted location, thought to be the largest accurately monitored toad group in the UK, reaches me with the subject line: "No toads." However, in February and March, he tells me, the group expects to help approximately 10,000 mature amphibians across the road.
Impact 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 evenings is quite extraordinary," notes an expert. "That's something that very much deserves recognition." However, while toad patrols are able to reduce the drop, they cannot prevent it entirely – not least because traffic is just one danger.
Additional Threats
The global warming has resulted in extended spells of drought, which create the wrong conditions for some of the creatures that toads consume, such as worms and slugs, 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 emerge from their hibernation more frequently, disrupting the resource preservation vital to their life cycle. Loss of environment – particularly the disappearance of large ponds – is another menace.
Experts are "often concerned about overemphasizing practical benefits on wildlife," however "It's important in just having these animals around." But toads play an significant part in the food chain, consuming almost any small creatures or small animals they can fit in their mouths and in turn sustaining a number of birds and mammals, such as hedgehogs and otters. Enhancing conditions for toads – ie creating more ponds, conserving woodland and installing amphibian passages – "benefits for a wide range of other species."
Historical 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
