Can the UK's Toads Survive from Roads and Population Collapse?
It's a Friday evening at half past seven, but instead of heading to the pub or watching a film, I've caught a train to a town in Wiltshire to join local helpers from a amphibian rescue group. These committed people sacrifice their evenings to protect the local toad population.
A Worrying Drop in Population
The common toad is becoming increasingly uncommon. A latest study conducted by an amphibian and reptile charity showed that the British common toad numbers have dropped by half since the mid-1980s. Seeing a creature that has been a fixture of the British countryside in decline is labeled "concerning" by researchers. Toads "don't require very specific conditions" and "ought to live quite well in the majority 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 Threat from Traffic
Though the research didn't cover the reasons for the drop, traffic is a major factor. Estimates indicate that 20 tons of toads are killed on UK roads annually – that is, several hundred thousand. Unlike frogs, which might be content to mate "if you left out a small container," toads prefer big bodies of water. Their capacity to remain away from water for longer than frogs allows they can journey farther to find them – often long distances. They tend to follow their traditional paths – it's common for adult toads 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 some move as far as spring, until it gets dark and moving through the night. During that time, toads start moving from wherever they have been overwintering "almost simultaneously."
A local helper, who grew up in the region and has been trying to protect its amphibians since he was a boy, notes that "Their sole purpose: to go and mate." If their route happens to a road, they could all get run over, and that breeding season would be lost – preventing a next generation of toads from being produced.
Toad Patrols Throughout the United Kingdom
Finding many of toad carcasses on nearby streets "resonates deeply with people," and has led to the formation of rescue teams across the UK – 274 groups are officially listed with a countrywide program. These teams collect toads and transport them over streets in buckets, as well as counting the number of toads they find and lobbying for other protection measures, such as blocked roads and amphibian passages.
Volunteers tend to operate during the migration season, when toad crossings are more regular. However, this implies they can miss numbers of toadlets, which, having existed as spawn and then juveniles, exit their ponds over an unpredictable schedule in late summer. Because of their size – just a couple of cm wide – "they are destroyed by vehicles." And as being hit "basically turns them into mush," it's harder to get data on them. At least when mature amphibians are killed, their carcasses can be counted.
Annual Efforts
Unlike many groups, one local team, who are in their eighth year of operating, go out throughout the year – not every night, but when weather are warm and wet, or if a member has posted about a amphibian spotting in their group chat. 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 arid period – but several 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 find one," says the group coordinator, pointing to her 14-year-old son and the experienced member. After for 120 minutes without a glimpse of any amphibians, and now they have climbed over a wire barrier to check under some logs.
Community Involvement
The mother and son joined the group a while back. The teenager adores all things nature-related and has an ambition to become a conservationist, so his mother started to search for activities they could do jointly to help native animals. Now she enjoys it as much as he does, the middle-aged small business owner explains – so when the team was seeking a new manager recently, she decided to step up.
The teenager, too, has played an important role in the group. A clip he made, imploring the municipal authority to block a street through a nature reserve during migration season, influenced the outcome the team's way. After a year of lobbying, the authority approved an "access-only" rule between 5pm and 5am from late winter through to April. Most drivers respected and avoided the road.
Additional Species and Challenges
Several cars go past when I'm out on patrol and we find some casualties as a result – no toads, but three squashed newts. We see one live amphibian as well, and the youngster is particularly pleased to see a harvestman, which moves in his palms. Yet despite the team's hardest attempts to let me see a toad, the local population has obviously gone dormant for the colder months. It seems that I wouldn't have had any more luck elsewhere in the nation – all the rescue teams I reach out to clarify that it's near-impossible at this season.
This team anticipates assisting around ten thousand mature toads over the street
One email I get from another volunteer, who has kindly taken the trouble to look for toads in a noted location, considered the largest accurately monitored toad population in the UK, reaches me with the subject line: "No toads." However, in late winter, he tells me, the group expects to help approximately ten thousand mature amphibians over the street.
Effectiveness and Limitations
What level of impact can these groups truly achieve? "The fact that volunteers are doing this regularly on cold, damp and unpleasant evenings is quite extraordinary," says an researcher. "That's something that very much should be celebrated." However, while toad patrols are able to reduce the drop, they cannot prevent it entirely – not least because traffic is not the only threat.
Additional Threats
The global warming has resulted in extended spells of drought, which cause the poor environment for some of the animals that toads consume, such as worms and slugs, while higher water temperatures have caused an increase of toxic plants, which can be harmful to toads. Milder winters also lead toads to emerge from their dormancy more frequently, interfering with the resource preservation crucial to their existence. Habitat destruction – especially the loss of big water bodies – is an additional threat.
Researchers are "always a bit worried about overemphasizing practical benefits on wildlife," but "There is a big value in just their presence." But toads play an significant part in the food chain, consuming pretty much any small creatures or small animals they can fit in their mouths and in turn feeding a variety of birds and mammals, such as wildlife. Improving situations for toads – such as creating more ponds, protecting forests and installing amphibian passages – "we'll improve them for a wide range of additional wildlife."
Cultural Significance
An additional motive to work to preserve toads around is their "important cultural value," notes an specialist. Legends and tales around toads go back {centuries|hundred