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Amphibian Surveys    Bat Surveys
Bird Survey     Boat Activity Survey
Vegetation Survey    Winter Carnivore Survey

Terrestrial Amphibians and Small Mammals

Six pitfall trap arrays are set up in different refuge habitats to survey terrestrial amphibians and small mammals.  The traps are baited and checked for a period of  four days each summer.  The captured animals are identified, measured and released.  The most common small mammals recorded are: masked shrew, southern red-backed vole, northern short-tailed shrew, and southern bog lemming.  The most common amphibians recorded are:  American toad, wood frog, mink frog and green frog.

Photo of pitfall survey: USFWS image