The Department of Natural Resources today announced that this year will be the thirteenth year of a statewide Frog and Toad Survey coordinated by the Natural Heritage Unit of the DNR's Wildlife Division.

Declining populations of frogs, toads and other amphibians have been documented worldwide since the 1980s. Studies suggest amphibians are disappearing due to habitat loss, pollution, disease, and other issues.

Michigan's annual survey efforts help biologists keep tabs on frog and toad abundance and distribution in the state.

"We have collected a large, valuable data set to help us evaluate the condition of Michigan's frog and toad populations," said Lori Sargent, the DNR's survey coordinator.

The surveys are conducted by volunteer observers along a statewide system of permanent survey routes, each consisting of 10 wetland sites. The same sites are visited three times during spring and summer. Observers listen for calling frogs and toads at each site, identify the species present, and make an estimate of abundance.

"There are more than 400 routes statewide, running through every Michigan county. We add routes every year, and the continued success of the program is dependent on strong volunteer support," said Sargent.

More information on the Frog and Toad Survey and other projects supported by the Nongame Fish and Wildlife Fund is available on the DNR Web site at www.michigan.gov/dnr.