Vertebrates of the class Amphibia including frogs and toads (Anura), salamanders (Urodela), caecilians (Apoda) and extinct forms which are cold-blooded and have life stages in water as eggs and larval forms (tadpoles)until they metamorphose as adults.
Amphibian population declines and deformities due to various causes including land use change, viruses, and fungi. Links to USGS press releases, answers to FAQs (HTML and PDF versions) and photos with downloadable files.
They're abundant in this area, but hard to count reliably. We outline a procedure for estimating the population sizes so that we can determine whether they're increasing or dwindling. We must both listen for their calls and visually confirm them.
Homepage for the Dept. of the Interior's Initiative coordinated by the USGS, for amphibian (frogs, toads, salamanders and newts) monitoring, research, and conservation. Links to National Atlas for Amphibian Distribution, photos, and interactive map serve
Links to information on species of frogs, toads, and salamanders located in the southeastern United States and the U.S. Virgin Islands, with information on appearance, habitats, calls, and status, plus photos, glossary, and provisional data.
Fact sheet (PDF format) on amphibians in Olympic National Park and overview of the habitat, the decline in populations, and rare amphibians in the Pacific Northwest including the giant salamander and tailed frog.
Constructed farm ponds represent significant breeding, rearing, and overwintering habitat for amphibians in the Driftless Area Ecoregion of Minnesota, Wisconsin, and Iowa. Links to fact sheet, brochure, annual reports, field manual, and final report.
The North American Amphibian Monitoring Program (NAAMP) is a long-term monitoring program designed to track the status and trends of frog and toad populations with links to data access, protocol, and how to volunteer as an observer.
Overview of the Southeastern Amphibian Research and Monitoring Initiative, annual report, field methods and protocols, statistical design and analysis, glossary, projects, and lists of frogs, toads and salamanders.
Access to Patuxent Wildlife Research Center fact sheets (PDFs) providing summaries of center studies on coastal ecosystems, birds, amphibians, taxonomy and other subjects and on center activities including partners and volunteer program.
Biomonitoring projects studying the status and trends of the nation's environmental resources and programs studying amphibians and birds. Links to long-term programs, resources and references, and related links.