What kinds of amphibian malformations have been noticed, and how widespread is the problem?

Multiple limbs, missing limbs, and facial abnormalities are the main developmental malformations seen. Malformed amphibians are now documented in 44 states, in 38 species of frogs and 19 species of toads, with estimates of deformities as high as 60 percent in some local populations. Scientists now agree that current numbers of reported malformations significantly exceed the normal statistical variation.

Deformed Leopard Frog

Learn more: USGS National Wildlife Health Center: Amphibian Malformations and Declines