Will Britain's Common Toads Survive from Roads and Terrible Decline?
It is a Friday evening at 7:30, but instead of heading to the pub or relaxing at home, I've taken a train to a market town in the countryside to meet up with local helpers from a amphibian rescue group. These committed people sacrifice their evenings to protect the native amphibian community.
A Worrying Decline in Population
The common toad is growing more uncommon. A latest research led by an amphibian and reptile charity revealed that the British common toad numbers have dropped by half since the mid-1980s. Seeing a species that has been a stalwart of the UK landscape in decline is labeled "worrying" by experts. Toads "don't need very specific conditions" and "should be able to live successfully in the majority of habitats in the UK," meaning if even they are struggling to persist, "it kind of suggests 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 causes for the drop, traffic certainly plays a part. Calculations suggest that 20 tons of toads are killed on UK roads annually – that is, several hundred thousand. Unlike frogs, which would probably be happy to mate "with just a bucket of water," toads favor big bodies of water. Their ability to remain away from water for longer than frogs means they can journey farther to reach them – often long distances. They tend to follow their ancestral migration routes – it's typical for adult toads to return to their birth pond to mate.
Breeding Habits
Fittingly, the initial amphibians start their journey for a mate around Valentine's day, but some move as far as spring, until it gets dark and moving after sunset. During that period, toads begin migrating from where they have been overwintering "all pretty much at the same time."
One volunteer, who was raised in the region and has been working to save its amphibians since he was a child, notes that "Their sole purpose: to go and have an orgy." If their path crosses a road, they could all get run over, and that breeding season would be lost – stopping a new generation of toads from being produced.
Toad Patrols Throughout the UK
Seeing many of toad carcasses on local roads "resonates deeply with people," and has led to the creation of rescue teams across the UK – hundreds of organizations are currently registered with a national initiative. These teams collect toads and transport them across roads in containers, as well as counting the number of toads they encounter and lobbying for other safety solutions, such as road closures and underground wildlife tunnels.
Patrols usually work during the breeding period, when toad crossings are frequent. However, this implies they can miss groups of young toads, which, having existed as eggs and then tadpoles, exit their ponds over an irregular timetable in late summer. Because of their size – just a couple of cm wide – "they are destroyed by car traffic." And as being hit "essentially crushes them," it's more difficult to collect information on them. At least when mature amphibians are killed, their remains can be counted.
Year-Round Efforts
Unlike many groups, a specific volunteer group, who are in their eighth year of operating, go out year-round – not nightly, but when conditions 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 a toady night" – winter dormancy has begun and it's been a arid period – but several of the volunteers gamely agree to walk up and down their route with me and search for any toads. "If anyone can locate any toads tonight, that pair will spot one," says the group coordinator, pointing to her teenage child and the experienced member. We've been out for 120 minutes without a glimpse of any amphibians, and now they have scaled a barbed wire fence to inspect beneath some wood.
Family Involvement
The family duo joined the patrol a year and a half ago. The teenager loves all things wildlife and has an goal to become a environmentalist, so his mother started to search for activities they could do together to protect local wildlife. Now she enjoys it as much as he does, the middle-aged entrepreneur explains – so when the group was looking for a new manager recently, she decided to step up.
The teenager, too, has played an important role in the organization. A clip he created, urging the municipal authority to block a street through a protected area during migration season, swung the decision the group's way. After a year of lobbying, the authority agreed to an "restricted access" rule between 5pm and 5am from late winter through to spring. The majority of motorists respected and avoided the route.
Other Wildlife and Challenges
A few vehicles go past when I'm out on duty and we find some casualties as a result – no toads, but three squashed newts. We see one live amphibian as well, and the teenager is particularly pleased to see a harvestman, which moves in his palms. Yet despite the group's best efforts to let me see a toad, the local population has clearly gone dormant for the winter. It appears that I couldn't have found any better success elsewhere in the country – all the patrol groups I contact clarify that it's near-impossible at this season.
They project rescuing nearly 10,000 grown amphibians during migration
A message I receive from another volunteer, who has generously 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 subject line: "None found." However, in late winter, he informs me, the group expects to help around ten thousand mature amphibians over the street.
Impact and Limitations
How much of a difference can these organizations truly achieve? "The reality that people are performing this consistently on cold, damp and unpleasant late nights is quite extraordinary," notes an expert. "This effort that very much should be celebrated." However, while rescue teams are able to slow the decline, they cannot prevent it entirely – partly since traffic is just one danger.
Additional Threats
The global warming has meant longer periods of drought, which cause the poor environment for some of the animals that toads eat, such as invertebrates, while higher water temperatures have caused an rise of blue-green algae, which can be harmful to toads. Milder winters also cause toads to emerge from their hibernation more often, interfering with the energy conservation crucial to their existence. Loss of environment – particularly the disappearance of large ponds – is an additional threat.
Experts are "always a bit worried about putting too much of a utilitarian spin on biodiversity," however "There is a big value in just having these animals around." But toads do have an significant part in the food chain, eating pretty much any small creatures or tiny organisms they can fit in their mouths and in turn sustaining a variety of predators, such as hedgehogs and otters. Enhancing situations for toads – ie creating more ponds, conserving woodland and installing toad tunnels – "benefits for a wide range of other species."
Historical Significance
Another reason to work to preserve toads present is their "historical significance," notes an expert. Myths and folklore around toads date back {centuries|hundred