AmphibiaWeb provides information on amphibian declines, natural history, conservation, and taxonomy.

Species of the Week
Dendrobates tinctorius | Dyeing Poison Frog

Amphibian News
Acoustic signals of frogs have been extensively studied, but much less is understood about their visual signals. In an extensive review, Rojas (2016) draws attention to polymorphism in color pattern within populations of a species. Although intra-populational polymorphism in pattern is known in several cryptic species, aposematic species are not expected to be polymorphic because this would reduce the efficiency of predator learning. Nonetheless, some species are. Although there is evidence that sexual selection may play a role, other explanations, such as spatiotemporal variation in selection, are possible. These are likely to be fruitful new avenues of research on the origin and maintenance of color pattern.

Current number of amphibian species: 7,567 (Sep 29, 2016) Newly added species