Can Britain's Toads Survive from Roads and Population Collapse?
It is Friday evening at half past seven, but rather than going out or relaxing at home, I've caught a train to a market town in Wiltshire to join local helpers from a amphibian rescue group. These dedicated individuals sacrifice their evenings to safeguard the native amphibian community.
A Worrying Drop in Numbers
The common toad is becoming increasingly uncommon. A recent study conducted by an amphibian and reptile charity revealed that the British common toad numbers have dropped by half since 1985. Seeing a creature that has been a fixture of the UK landscape in decrease is labeled "concerning" by researchers. Toads "don't require very specific conditions" and "ought to live quite well in the majority of areas in Britain," so if even they are not managing to survive, "it indicates that things are not as they should be."
The UK toad population has almost halved since 1985
The Threat from Traffic
Though the research didn't examine the causes for the drop, cars certainly plays a part. Calculations indicate that 20 tonnes of toads are killed on British roads every year – that is, several hundred thousand. Unlike frogs, which would probably be content to mate "if you left out a small container," toads favor large ponds. Their ability to remain away from water for longer than frogs allows they can travel further to find them – sometimes hundreds of metres. They usually follow their ancestral migration routes – it's common for mature amphibians to return to their birth pond to mate.
Breeding Patterns
Appropriately enough, the initial amphibians start their journey for a partner around Valentine's day, but some move as late as spring, until it gets dark and moving through the night. During that time, toads begin migrating from where they have been overwintering "all pretty much at the same time."
One volunteer, who was raised in the area and has been working to save its toad population since he was a child, notes that "Their sole purpose: to go and mate." If their path happens to a road, they could all get run over, and that breeding season would be lost – stopping a next generation of toads from being born.
Toad Patrols Across the UK
Seeing many of toad carcasses on local roads "resonates deeply with people," and has led to the formation of toad patrols throughout the UK – hundreds of organizations are currently registered with a national initiative. These groups pick up toads and transport them across roads in buckets, as well as counting the number of toads they encounter and advocating for other protection measures, such as blocked roads and amphibian passages.
Volunteers tend to operate during the breeding period, when amphibian movements are more regular. However, this implies they can miss numbers of toadlets, which, having been eggs and then tadpoles, leave their ponds over an unpredictable schedule in late summer. Because of their small stature – just a couple of cm wide – "they are destroyed by car traffic." And as being hit "basically turns them into mush," it's more difficult to collect information on them. At least when adult toads are killed, their remains can be counted.
Year-Round Work
Unlike many groups, a specific volunteer group, who are in their eighth year of operating, go out throughout the year – not nightly, but whenever weather are damp, or if a member has reported about a toad sighting in their group chat. When I request to accompany them on patrol, they concede it is "not ideal conditions" – toad hibernation season has started and it's been a dry day – but a few of the helpers willingly accept to patrol their area with me and search for any toads. "Should anyone can locate any toads tonight, those two will find one," says the group coordinator, indicating her 14-year-old son and the longtime volunteer. After for 120 minutes without a glimpse of any amphibians, and now they have climbed over a wire barrier to inspect beneath some wood.
Family Involvement
The mother and son joined the group a while back. The youngster adores all things nature-related and has an goal to become a conservationist, so his mother started to search for things they could do jointly to protect native animals. Now she loves it as much as he does, the middle-aged small business owner tells me – so when the group was seeking a new manager lately, she decided to step up.
The teenager, too, has been instrumental in the organization. A clip he made, urging the local council to block a street through a nature reserve during breeding time, swung the decision the team's way. After a twelve months of campaigning, the council approved an "restricted access" restriction between evening and morning from late winter through to April. Most drivers respected and avoided the route.
Other Wildlife and Challenges
A few vehicles go by when I'm out on duty and we find some victims as a consequence – no amphibians, but several crushed salamanders. We see one live amphibian as well, and the teenager is particularly pleased to see a harvestman, which moves in his palms. Yet in spite of the team's hardest attempts to show me a toad, the local population has obviously settled down for the colder months. It seems that I couldn't have found any more luck elsewhere in the nation – all the patrol groups I reach out to explain that it's very difficult at this time of year.
They project rescuing nearly 10,000 grown amphibians during migration
A message I get from a different helper, who has generously made the effort to look for toads in a noted location, thought to be the biggest tracked toad population in the UK, reaches me with the subject line: "None found." However, in late winter, he tells me, the group plans to assist around ten thousand adult toads across the road.
Effectiveness and Limitations
What level of impact can these groups actually make? "The fact that people are performing this consistently on cold, damp and unpleasant late nights is remarkable," notes 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 vehicles is just one danger.
Additional Threats
The global warming has meant extended spells of drought, which create the poor environment for some of the animals that toads eat, such as worms and slugs, while warmer ponds have led to an rise of toxic plants, which can be toxic to toads. Milder winters also lead toads to emerge from their dormancy more frequently, disrupting the energy conservation crucial to their life cycle. Habitat destruction – especially the disappearance of big water bodies – is another menace.
Experts are "often concerned about overemphasizing practical benefits on biodiversity," but "There is a big value in just their presence." But toads play an significant part in the food chain, eating almost any invertebrates 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 – "we'll improve them for a wide range of other species."
Cultural Significance
An additional motive to work to preserve toads around is their "historical significance," notes an specialist. Legends and tales around toads go back {centuries|hundred
