Amphibians

Declines in several amphibian species have been studied for over 20 years. More recent concern about deformed frogs arose with the discovery of large numbers of deformed leopard frogs in Minnesota in 1995, however, scientists agree that deformities are...
There does not appear to be one 'smoking gun'; numerous environmental factors are probably responsible for the declines and deformities. Limited research findings and anecdotal information suggest several possible causes, including habitat loss,...
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...
Scientists have documented four major 'hot spots' for amphibian declines: western North America, Central America, northeast Australia, and Puerto Rico. Researchers believe that all of these declines , most in seemingly pristine areas, have occurred since...
Amphibians are good indicators of significant environmental changes. Amphibians, unlike people, breathe at least partly through their skin, which is constantly exposed to everything in their environment. Consequently, their bodies are much more sensitive...
The worldwide pattern of amphibian declines includes both loss of populations from parts of species' ranges -- the pattern seen in Australia and Central American tropics with stream frogs -- and declines of entire species, such as ranid frogs in...
There are about 230 species of amphibians, including about 140 species of salamanders and 90 species of frogs and toads, that can be found in the continental United States.Learn more: Checklist of Amphibian Species and Identification Guide for lists of...
In response to indications of worldwide declines in amphibian populations, the President and Congress directed Interior Department agencies to initiate a national program of amphibian monitoring, research, and conservation. There is an urgent need to...
Learn more:Amphibian Research and Monitoring InitiativeUSGS National Wildlife Health Center: Amphibian Malformations and DeclinesUSGS Western Ecological Research Center: Amphibian Research and MonitoringField Guide to Malformations of Frogs and Toads