Federal Government
Rana
catesbeianus - Nonindigenous Aquatic Species Database DOI. USGS. Southeast Ecological Science Center.
Identification/Description; Photographs; Introduction History; Impacts; Distribution;
Special Note: Distribution maps and collection information (State and County)
Rana catesbeiana
Integrated Taxonomic Information System.
Taxonomy
Rana catesbeiana Article Citation Search - AGRICOLA Database
USDA. National Agricultural Library.
Research; Special Note: NAL Catalog Search (resources)
Rana catesbeiana Bullfrog
USDA. Forest Service.
Identification/Description; Photographs; Introduction History; Life Cycle; Distribution
Alien Species in Cahoots (News Release, Apr 14, 2003)
DOI. United States Geological Survey.
Impacts
American Bullfrog - Checklist of Amphibian Species and Identification Guide
DOI. Northern Prairie Wildlife Research Center.
Identification/Description; Photographs; Distribution
Impact of invasive exotic animals on native reptiles and amphibians -- Cane toad / Bullfrog
DOI. Western Ecological Research Center.
Introduction History; Photographs; Impacts |