Will Britain's Common Toads Survive from Roads and Population Collapse?

It is a Friday evening at half past seven, but instead of going out or watching a film, I've taken a train to a market town in Wiltshire to meet up with volunteers from a amphibian rescue group. These dedicated individuals give up their evenings to protect the local toad population.

An Alarming Drop in Population

The common toad is becoming increasingly rare. A recent research led by an wildlife conservation group showed that the British common toad numbers have almost halved since 1985. Seeing a species that has been a fixture of the UK landscape in decline is described as "concerning" by experts. Toads "don't require very specific conditions" and "should be able to live quite well 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 Danger from Traffic

Though the research didn't examine the reasons for the decline, traffic certainly plays a part. Calculations suggest that 20 tons of toads are killed on UK roads every year – that is, several hundred thousand. Unlike frogs, which might be content to mate "if you left out 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 reach them – often hundreds of metres. They usually stick to their traditional paths – it's typical for mature amphibians to return to their natal pond to mate.

Migration Patterns

Fittingly, the initial amphibians start their journey for a partner around February 14th, but some move as far as spring, waiting until it gets night and travelling through the night. During that period, toads start moving from wherever they have been hibernating "almost simultaneously."

A local helper, who was raised in the region and has been working to save its amphibians since he was a boy, notes that "They've got just one focus: to go and mate." If their path crosses a street, they could all get run over, and that mating period would never happen – preventing a new generation of toads from being born.

Rescue Groups Throughout the UK

Seeing hundreds of dead toads on nearby streets "inherently strikes a chord with people," and has resulted in the creation of rescue teams across the UK – 274 groups are officially listed with a countrywide program. These groups pick up toads and transport them over streets in containers, as well as recording the quantity of toads they find and advocating for other protection measures, such as blocked roads and underground wildlife tunnels.

Volunteers usually work during the migration season, when toad crossings are frequent. However, this implies they can miss groups of toadlets, which, having been spawn and then juveniles, leave their ponds over an irregular timetable in late summer. Because of their small stature – just one or two centimetres wide – "they are destroyed by car traffic." And as being hit "basically turns them into mush," it's harder to collect information on them. At least when mature amphibians are lost, their remains can be counted.

Annual Efforts

In contrast to many groups, one local team, who are in their eighth season of functioning, go out throughout the year – not nightly, but whenever 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 concede it is "not a toady night" – winter dormancy has started and it's been a dry day – but several of the volunteers gamely agree to patrol their route with me and search for any toads. "If anyone can find any toads tonight, that pair will spot one," says the patrol manager, indicating her teenage child and the experienced member. After for two hours without a glimpse of any amphibians, and now they have climbed over a wire barrier to inspect beneath some wood.

Community Involvement

The family duo joined the patrol a while back. The teenager adores all things nature-related and has an ambition to become a environmentalist, so his mother started to search for activities they could do jointly to protect native animals. Now she enjoys it as much as he does, the 41-year-old entrepreneur explains – so when the group was seeking a new manager lately, she decided to step up.

The youth, too, has played an important role in the organization. A video he created, urging the municipal authority to block a street through a nature reserve during migration season, swung the decision the team's way. After a year of lobbying, the authority agreed to an "restricted access" rule between 5pm and 5am from late winter through to April. The majority of motorists respected and avoided the road.

Additional Species and Challenges

Several vehicles go past when I'm out on duty and we find some casualties as a result – no amphibians, but several crushed salamanders. We see one live amphibian as well, and the teenager is particularly pleased to see a daddy longlegs, which dances in his palms. Yet despite the group's hardest attempts to let me see a toad, the local population has obviously settled down for the winter. It appears that I wouldn't have had any more luck elsewhere in the country – all the patrol groups I reach out to explain that it's near-impossible at this season.

They project rescuing nearly 10,000 grown amphibians during migration

One email I get from another volunteer, who has kindly made the effort to check for toads in a famous site, considered the biggest tracked toad group in the UK, arrives in my inbox with the subject line: "No toads." However, in late winter, he tells me, the group plans to assist approximately ten thousand mature amphibians across the road.

Impact and Limitations

What level of impact can these groups truly achieve? "The fact that people are doing this consistently on cold, damp and unpleasant evenings is remarkable," notes an expert. "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 vehicles is not the only threat.

Additional Threats

The climate crisis has meant extended spells of dry weather, which create the wrong conditions for some of the animals that toads consume, such as worms and slugs, while warmer ponds have caused an rise of toxic plants, which can be toxic to toads. Milder winters also lead toads to emerge from their hibernation more often, disrupting the resource preservation vital to their existence. Loss of environment – particularly the disappearance of big water bodies – is an additional threat.

Researchers are "often concerned about overemphasizing practical benefits on biodiversity," however "There is a big value in just their presence." But toads play an important role in the ecosystem, consuming almost any invertebrates or small animals they can fit in their mouths and in turn feeding a number of predators, such as wildlife. Improving conditions for toads – such as creating more ponds, protecting forests and installing amphibian passages – "benefits for a whole bunch of other species."

Cultural Significance

An additional motive to try to keep toads present is their "important cultural value," adds an specialist. Legends and tales around toads go back {centuries|hundred

James Palmer
James Palmer

A tech journalist and digital strategist with over a decade of experience covering emerging technologies and their societal impacts.