"The local distribution and ecology of the plethodontid salamanders of the southern Appalachians" | - Short video clips of calling frogs and interviews with scientists about frog issues• "Direct observation and review of herbivory in Sirenidae Amphibia: Caudata " |
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- San Francisco Chronicle, April 20, 1992• Volunteer frog and toad monitoring program by National Wildlife Federation and USGS, includes links to frog calls of the United States• International Union for Conservation of Nature | "The feeding system of terrestrial tiger salamanders Ambystoma tigrinum melanostictum baird " |
"The Function of Costal Grooves in Salamanders Amphibia, Urodela ".
5IUCN Red List of Threatened Species | Encyclopedia of Reptiles and Amphibians |
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"Extremely high-power tongue projection in plethodontid salamanders" | Proceedings of the National Academy of Sciences of the United States of America |