Rana catesbeina

• American Bullfrog, Rana catesbeiana  - Covers size, coloration, gender identification, native and introduced locations, map, and photos.
• Bullfrog Rana catesbeiana  - Describes distinguishing features, range and habitats. With pictures, maps and links.
• DesertUSA Bullfrog Rana catesbeiana  - Contains information on physical description, distribution, habitat, calling sound, behavior, breeding and food habits. With pictures and links to related sites.
• Frogs and Toads of Georgia Bullfrog Rana catesbeiana  - Contains information on diagnostic features, natural history, voice, tadpoles and range. With pictures, maps, sounds and links.
• Iowa Herpetology Bullfrog Rana catesbeiana  - Provides information on status, description, subspecies, range, habitat, habits and feeding. With pictures and links.
• Nova Scotia Frogs Bullfrog  - Contains information on habitat, calling, reproduction and diet. With pictures and links.
• Reptiles and Amphibians of Minniesota Bullfrog Rana catesbeiana  - Presents information on status, description, subspecies, range, habitat, habits and feeding. With pictures and links.
• USGS Western Ecological Research Center Bullfrog Rana catesbeiana  - Provides information on size, distinguishing characteristics, juveniles, dimorphism and similar species. With pictures and links.