Twenty-six amphibian species are found in Michigan, one of the fifty United States. These species include twelve species of frog, twelve species of salamander and two species of toad, all members of the class Amphibia. Blanchard's cricket frog (pictured), a subspecies of northern cricket frog, is considered to be threatened and two species, the marbled salamander and small-mouth salamander, are considered endangered; these are protected under the Endangered Species Act of the State of Michigan. Two more species, the boreal chorus frog and lesser siren, are considered to be of special concern, although they are not protected under the act. Most of Michigan's frogs and toads become dormant in the winter; some frogs can withstand short periods of freezing conditions, but this is not true of all species. Some species of salamander also hibernate during the winter, while other fully aquatic species remain active throughout the year. (Full list...)