Will the UK's Toads Survive from Traffic and Population Collapse?
It's a Friday night at half past seven, but instead of going out or relaxing at home, I've caught a train to a market town in the countryside to meet up with volunteers from a amphibian rescue group. These committed people give up their evenings to safeguard the native amphibian community.
A Worrying Drop in Numbers
The Bufo bufo is becoming increasingly rare. A recent research led by an amphibian and reptile charity showed that the British common toad numbers have dropped by half since 1985. Observing a creature that has been a stalwart of the British countryside in decline is described as "concerning" by experts. Toads "don't need very specific conditions" and "should be able to live quite well in the majority of areas in Britain," so if even they are not managing to survive, "it indicates that the ecosystem is unbalanced."
The UK toad population has almost halved since 1985
The Threat from Roads
Though the study didn't examine the reasons for the drop, traffic certainly plays a part. Estimates suggest that 20 tonnes of toads are crushed on British roads every year – in other words, hundreds of thousands. In contrast to frogs, which would probably be content to mate "with just a small container," toads favor big bodies of water. Their ability to remain away from water for longer than frogs means they can travel further to find them – often hundreds of metres. They usually follow their ancestral migration routes – it's typical for mature amphibians to return to their birth pond to mate.
Breeding Patterns
Appropriately enough, the initial amphibians start their journey for a mate around February 14th, but some move as far as spring, waiting until it gets night and travelling through the night. During that period, toads begin migrating from where they have been hibernating "almost simultaneously."
One volunteer, who grew up in the region and has been working to save its toad population since he was a boy, notes that "They've got just one focus: to go and have an orgy." If their route 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.
Rescue Groups Across the UK
Finding hundreds of toad carcasses on nearby streets "inherently strikes a chord with people," and has led to the formation of rescue teams throughout the UK – hundreds of organizations are officially listed with a countrywide program. These teams pick up toads and carry them across roads in buckets, as well as recording the quantity of toads they encounter and advocating for other protection measures, such as blocked roads and amphibian passages.
Patrols usually work during the migration season, when amphibian movements are more regular. However, this means they can overlook numbers of toadlets, which, having been spawn and then juveniles, exit their ponds over an irregular timetable in late summer. Because of their small stature – just one or two centimetres wide – "they can get obliterated by vehicles." And as being hit "essentially crushes them," it's more difficult to collect information on them. At least when adult toads are lost, their carcasses can be counted.
Year-Round Work
Unlike many groups, one local team, who are in their eighth season of operating, go out throughout the year – not nightly, but when weather are damp, or if a member has posted about a amphibian spotting in their group chat. When I request to accompany them on patrol, they admit it is "not a toady night" – winter dormancy has begun and it's been a arid period – but a few of the volunteers willingly accept to walk up and down their route with me and search for any toads. "If anyone can locate any toads tonight, that pair will find one," says the patrol manager, indicating her 14-year-old son and the experienced member. After for 120 minutes without a single toad sighting, and now they have scaled a barbed wire fence to check under some logs.
Community Involvement
The mother and son became part of the group a year and a half ago. The youngster adores all things nature-related and has an goal to become a environmentalist, so his mother started to look for things they could do together to protect native animals. Now she enjoys it as much as he does, the middle-aged small business owner explains – so when the group was looking for a new manager lately, she decided to step up.
The teenager, too, has been instrumental in the group. A video he created, urging the local council to close a street through a protected area during migration season, swung the decision the group's way. After a year of campaigning, the council approved an "restricted access" rule between evening and morning from February through to April. Most drivers duly avoided the road.
Additional Species and Challenges
A few vehicles go by when I'm out on patrol and we find some victims as a result – no toads, but three squashed newts. We see one live amphibian as well, and the teenager is especially excited to see a harvestman, which moves in his hands. Yet despite the team's hardest attempts to show me a toad, the native community has obviously gone dormant for the winter. It appears that I couldn't have found any more luck anywhere else in the nation – all the patrol groups I contact explain 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 made the effort to check for toads in a noted location, thought to be the biggest tracked toad group in the UK, arrives in my inbox with the title: "No toads." However, in February and March, he informs me, the group plans to assist around 10,000 mature amphibians over the street.
Impact and Limitations
How much of a difference can these organizations truly achieve? "The fact that volunteers are doing this consistently on chilly, wet and miserable evenings is remarkable," says an researcher. "This effort that very much deserves recognition." However, while rescue teams are able to reduce the drop, they can't stop it completely – not least because traffic is not the only threat.
Additional Threats
The climate crisis has meant longer periods of dry weather, which create the poor environment for some of the creatures that toads eat, such as invertebrates, while higher water temperatures have caused an increase of blue-green algae, which can be toxic to toads. Warmer cold seasons also cause toads to wake up from their dormancy more frequently, disrupting the energy conservation vital to their existence. Loss of environment – particularly the loss of big water bodies – is another menace.
Experts are "often concerned about overemphasizing practical benefits on biodiversity," however "There is a big value in just having these animals around." But toads play an important role in the food chain, consuming pretty much any invertebrates or tiny organisms they can swallow and in turn feeding a variety of predators, such as wildlife. Enhancing conditions for toads – ie creating more ponds, protecting forests and constructing amphibian passages – "we'll improve them for a whole bunch of other species."
Historical Significance
An additional motive to work to preserve toads around is their "historical significance," adds an expert. Legends and tales around toads go back {centuries|hundred