Amphibiaweb.org
http://amphibiaweb.org/
Taxonomic information for every species of amphibian in the world. It
included descriptions, life history, conservation, references, photos
and range maps.
Center for North American Herpetology
http://www.naherpetology.org/
Checklist of Amphibian Species and Identification Guide
http://www.npwrc.usgs.gov/resource/herps/amphibid/index.htm
EMBL Reptile Database
http://www.embl-heidelberg.de/~uetz/LivingReptiles.html
Scientific and Common Names of the Reptiles and Amphibians of North America Explained
http://ebeltz.net/herps/etymain.html