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Abbreviation Legend
- (CE) - Criticially Endangered
- (CI) - Critically Imperiled
- (E) - Endangered
- (I) - Introduced
- (IM) - Imperiled
- (NT) - Near Threatened
- (T) - Threatened
- (V) - Vulnerable
- (**) - Recent Classification Change
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Tailed Frogs (Ascaphidae) of the United States
The tailed frogs are 2 species of the frogs in the genus Ascaphus, the only taxon in this family. The "tail" is actually an extension of the male cloaca. The tail is one of two distinctive anatomical features adapting the species to life in fast flowing streams.
There are 2 species found in the United States, both are native to the U.S.
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