Hundreds of migrating frogs found dead on rural roads
Biologist wants to help the amphibians

Danielle Bell, Daily News
Published: Tuesday, October 07, 2008

October is migration season for several amphibious species that are getting run over by the dozens along a Nanaimo road.

One local amphibian biologist wants to raise awareness and hopes to generate funds to help the masses move safely. Several species of frogs are migrating from summer foraging grounds to wetlands. Several salamanders species are in breeding season and rain brings them to the surface in search of mates.

A Saturday survey counted nearly 500 dead amphibians along roughly nine kilometres of Nanaimo Lakes/South Forks Road. More intensive trapping, surveying and research would need to be done to estimate what percentage of the animals become roadkill and the long-term effects it poses on wildlife.

"Right around this time (of year) it triggers a migratory response in a lot of amphibians," said Elke Wind, a Nanaimo amphibian biologist. "If you're just driving along that road it's almost impossible (to avoid them). I just saw tons of dead animals."

Many animals also make their trek at night, making it even harder for drivers. Nine native species have been counted dead along the road, including the Western Toad and Red-Legged Frog, two species of special concern.

Wind is one leader of the Nanaimo Young Naturalist's Club and has been surveying the street for several years. In 18 amphibian road mortality surveys since 2005, Wind estimates they counted 2,000 amphibians, 99% of which were dead. She hopes to continue surveys every three days to assess the impact of road traffic and recommend strategies.

Some communities have built short fencing that directs the animals into a nearby culvert although rain water currents can prove too strong for some of the animals. Wind recently put up a short stretch of similar fencing.

In Comox, crossing places for toads were built under the pavement several years ago. Other cities have considered closing problem stretches during migration season. In Europe, wildlife can cross via an underground passage. To report amphibious migrations, log onto the B.C. Frogwatch Program at www.env.gov.bc.ca/wld/frogwatch.

DBell@nanaimodailynews.com
250-729-4255

© The Daily News (Nanaimo) 2008
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