Can Britain's Common Toads Survive from Roads and Terrible Decline?
It's Friday night at 7:30, but rather than heading to the pub or watching a film, I've taken a train to a town in Wiltshire to join local helpers from a amphibian rescue group. These committed people give up their evenings to protect the native amphibian community.
An Alarming Drop in Population
The Bufo bufo is growing more rare. A latest study led by an amphibian and reptile charity 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 "concerning" by researchers. Toads "don't need very specific conditions" and "ought 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."
Toad populations across the UK have declined by almost 50% since the 1980s
The Threat from Traffic
Though the study didn't examine the causes for the drop, cars certainly plays a part. Calculations indicate that 20 tonnes of toads are crushed on British roads annually – in other words, hundreds of thousands. Unlike frogs, which might be content to mate "with just a small container," toads prefer big bodies of water. Their ability to stay out of water for more time than frogs means they can journey farther to reach them – often hundreds of metres. They tend to stick to their traditional paths – it's common for mature amphibians to return to their birth pond to mate.
Migration Patterns
Appropriately enough, the initial amphibians start their journey for a partner around Valentine's day, but some move as far as April, until it gets dark and moving through the night. During that time, toads start moving from where they have been hibernating "almost simultaneously."
One volunteer, who grew up in the area and has been working to save its amphibians since he was a child, notes that "They've got just one focus: to go and have an orgy." If their path happens to a road, they could be killed by traffic, and that breeding season would be lost – stopping a next generation of toads from being produced.
Toad Patrols Across the United Kingdom
Finding hundreds of dead toads on nearby streets "inherently strikes a chord with people," and has resulted in the creation of rescue teams throughout the UK – hundreds of organizations are currently registered with a countrywide program. These teams pick up toads and transport them over streets in containers, as well as recording the number of toads they encounter and lobbying for other protection measures, such as blocked roads and amphibian passages.
Volunteers usually work during the breeding period, when amphibian movements are frequent. However, this means they can overlook numbers of toadlets, which, having been eggs and then tadpoles, leave their water habitats over an irregular timetable in the end of summer. Because of their small stature – just a couple of cm wide – "they can get obliterated by car traffic." And as being run over "essentially crushes them," it's harder to get data on them. At least when mature amphibians are killed, their carcasses can be tallied.
Annual Work
Unlike most patrols, one local team, who are in their eighth season of operating, go out throughout the year – not nightly, but whenever conditions are warm and wet, or if a member has reported about a amphibian spotting in their messaging app. When I request to accompany them on duty, they admit it is "not ideal conditions" – toad hibernation season has begun and it's been a dry day – but a few of the volunteers gamely agree to patrol their route with me and search for any toads. "Should anyone can find any toads tonight, those two will spot one," says the patrol manager, pointing to her teenage child and the experienced member. After for two hours without a single toad sighting, and now they have climbed over a wire barrier to inspect beneath some logs.
Family Participation
The family duo became part of the group a while back. The youngster adores all things nature-related and has an goal to become a environmentalist, so his mother started to look for activities they could do jointly to protect native animals. Now she enjoys it as much as he does, the middle-aged entrepreneur explains – so when the group was looking for a fresh coordinator lately, she decided to step up.
The youth, too, has played an important role in the group. A video he created, urging the municipal authority to close a road through a nature reserve during migration season, influenced the outcome the group's way. After a year of lobbying, the authority agreed to an "restricted access" rule between evening and morning from late winter through to April. The majority of motorists respected and avoided the road.
Other Wildlife and Difficulties
A few vehicles go by when I'm out on patrol and we find some casualties as a result – no toads, but several crushed salamanders. We spot one live amphibian as well, and the youngster is particularly pleased to see a harvestman, which dances in his palms. Yet in spite of the group's hardest attempts to show me a toad, the local population has clearly settled down for the colder months. It seems that I couldn't have found any better success anywhere else in the country – all the rescue teams I reach out to explain that it's near-impossible at this time of year.
They project rescuing nearly 10,000 grown amphibians during migration
A message I receive from a different helper, who has generously taken the trouble to look for toads in a famous site, thought to be the biggest tracked toad group in the UK, reaches me with the subject line: "No toads." However, in late winter, he informs me, the team plans to assist around ten thousand mature amphibians across the road.
Effectiveness and Challenges
How much of a difference can these organizations actually make? "The fact that people are doing this consistently on cold, damp and unpleasant late nights is remarkable," says an researcher. "This effort that very much deserves recognition." However, while toad patrols are able to reduce the drop, they can't stop it completely – partly since vehicles is just one danger.
Additional Threats
The global warming has resulted in longer periods of dry weather, which cause the poor environment for some of the creatures that toads eat, such as invertebrates, while higher water temperatures have caused an increase of toxic plants, which can be harmful to toads. Milder winters also lead toads to wake up from their hibernation more frequently, interfering with the energy conservation crucial to their life cycle. Habitat destruction – especially the loss of large ponds – is another menace.
Researchers are "always a bit worried about putting too much of a utilitarian spin on wildlife," but "There is a big value in just their presence." But toads play an significant part in the food chain, eating almost any small creatures or small animals they can swallow and in turn feeding a number of predators, such as hedgehogs and otters. Enhancing situations for toads – ie building water habitats, conserving woodland and constructing toad tunnels – "we'll improve them for a whole bunch of other species."
Historical Importance
An additional motive to try to keep toads around is their "important cultural value," notes an expert. Myths and folklore around toads go back {centuries|hundred