Spring migration: how frogs and toads cross roads, and how to help safely

When spring arrives, quiet ponds suddenly come to life. Amphibians wake from winter dormancy and set off toward the water where they will breed, and sometimes their route crosses a road. According to Froglife, common toads return to the same ancestral breeding ponds every year and keep to the same routes even when a road lies across them, which leads to deadly encounters with traffic. This article explains when and why migration happens, how volunteers help, and the basics of helping safely, using Froglife, The Wildlife Trusts, ARC and the Harris Center in the US. Our sources are from the UK and the US; we couldn't find an official source for anything specific to Türkiye, so we don't cover it.

When and how does migration start?

According to The Wildlife Trusts, common toads gather and travel to their breeding ponds on the first mild, damp evenings of the year, often around Valentine's Day. ARC says toads return to the same ancestral pond each spring, gathering about two weeks after common frogs have bred. Breeding lasts roughly a week, after which the adults leave. In early summer, usually after rain, tiny toadlets leave the water in large numbers. ARC's FAQ adds that newly emerged young also disperse from ponds in summer.

Froglife says migration can run from January to April, and toads typically come out of hibernation a little later than frogs. One Froglife article describes a Cornwall migration that now begins around late January or early February and may start even earlier as the climate warms, so timing isn't the same everywhere.

Why are roads such a problem?

Froglife says toads keep to their routes even when a road is built across them. The Wildlife Trusts estimates that the UK loses about 20 tonnes of toads to traffic each year, and says a spot where more than 1,000 toads cross is called a "toad crossing." ARC also notes that roads cut across migration routes and that dead toads are often found on them.

A Froglife example makes it concrete: at one crossing in Cornwall, about 500 to 600 toads are moved each year, and roughly 100 to 150 still die. The same article says a single car passing at the wrong moment can kill many toads.

How does a volunteer toad patrol work?

Froglife's "Toads on Roads" project has run for more than twenty years, registering known crossings and coordinating local volunteer patrols. Patrollers help toads cross safely, and local groups can ask their council for road warning signs. Froglife says patrolling spans weeks rather than a single night, so patrol managers expect commitment, but volunteers decide how much time to give.

1. Watch the weather: Froglife says toad movement depends heavily on the weather; start monitoring once it turns mild (above about 5 °C) and rainy.
2. Pick the time: According to Froglife, the early evening is when toads are most likely to meet traffic; movement continues later into the night.
3. Get your gear: Reflective or high-visibility clothing, a torch and a bucket for carrying toads.
4. Carry them across: Collect a toad from the side of the road it is on and carry it in a bucket to the other side, in the direction of its pond (Froglife).
5. Keep records: Note how many toads you help across, how many you see killed, and how many days and people patrol; Froglife says yearly figures help persuade planners and authorities.

Safety comes first

Froglife puts your own safety above everything: if the road is busy or visibility is poor, don't attempt rescues. The Harris Center handbook, written for volunteers on rainy migration nights ("Big Nights"), gives a similar warning: don't try to survey busy roads with fast traffic, because it's too dangerous. The same handbook says a reflective vest is a must, phone flashlights aren't enough, and you should carry a flashlight or headlamp. For volunteers driving to a crossing it recommends slowing to about 15 mph (about 24 km/h), pulling the car completely off the road where it is visible to other drivers, and watching for animals on the drive home.

How do you handle the animals?

The UK sources give little detail here; Froglife's patroller page points to its own "Toad Patrol Pack" document. The Harris Center handbook in the US is more specific:

• Wet your hands: Before touching amphibians, wear nitrile gloves or wet your hands with rainwater.
• No chemicals: Amphibians absorb toxins readily through the skin, so your hands should be free of lotion, bug spray, perfume and hand sanitizer. The handbook specifically says not to use sanitizer on Big Nights.
• Hold the middle: Hold the animal gently but firmly around the center of its body; never carry it by the legs or tail.
• Keep their direction: Move the animal across in the direction it was heading and release it well off the road.
• Clean bucket: Use a bucket with no soap or chemicals, rinsed thoroughly if needed.

These rules were written for volunteers in the US who move species such as spotted salamanders and wood frogs. Still, clean, wet hands are a general precaution for amphibians' sensitive skin. If you keep a pet amphibian, see touching amphibians.

If you run into migration near home

• If you're driving and see a toad crossing sign, remember what Froglife describes: toads have followed the same routes for years.
• To make your own pond friendlier to amphibians, see caring for a wildlife pond.
• To tell whether your garden visitor is a frog or a toad, see frog or toad.
• To find a local group, Froglife offers a crossing map called TorMap and a page for registering new crossings; both are for the UK.

Frequently asked questions

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Sources

• Froglife · Toads on Roads
• Froglife · How to become a Toad Patroller
• Froglife · Restarting a toad patrol (2026)
• The Wildlife Trusts · Common toad
• Amphibian and Reptile Conservation (ARC) · Common toad
• Harris Center for Conservation Education · Salamander Crossing Brigades Handbook (2024)

This article is for general information only; it is not a diagnosis or treatment advice and does not replace a visit to a veterinarian. Talk to your vet about decisions on your pet's health. By Tüylüm · Published and last checked: November 9, 2026. Spotted a mistake? Write to [email protected] and we'll fix it right away. Photos are from Wikimedia Commons, used under the license shown below each photo.