Source: USGS Western Ecological Research Center. Photographer: Chris Brown. Lithobates catesbeianus - American Bullfrog
Source: USGS Western Ecology Research Center. Photographer: Cecil Schwalbe. Bullfrog eating a bat in the San Bernadino National Wildlife Refuge in the Sonoran Desert Lithobates catesbeianus - American Bullfrog
Source: USGS National Wetlands Research Center. Photographer: Dana Drake. Tadpole. Lafayette Parish, Louisiana. Lithobates catesbeianus - American Bullfrog
Source: USGS National Wetlands Research Center. Photographer: Dana Drake. Blue American bullfrog. St. Mary Parish, Louisiana. Lithobates catesbeianus - American Bullfrog
Source: USGS National Wetlands Research Center. Photographer: Dana Drake. Blue-purple bullfrog found in Lafourche Parish, Louisiana. Lithobates catesbeianus - American Bullfrog
Source: Savannah River Ecology Lab. Photographer: John D. Willson. Middlesex County, Massachusetts.
Lithobates catesbeianus - American Bullfrog
Source: USGS National Wetlands Research Center. Photographer: Brad M. Glorioso. Webbing; Atchafalaya Basin, Louisiana. Lithobates catesbeianus - American Bullfrog
Source: USGS National Wetlands Research Center. Photographer: Brad M. Glorioso. Venter; Atchafalaya Basin, Louisiana. Lithobates catesbeianus - American Bullfrog
Source: USGS National Wetlands Research Center. Photographer: Brad M. Glorioso. Big Thicket National Preserve, Orange County, Texas. Lithobates catesbeianus - American Bullfrog
Source: USGS National Wetlands Research Center. Photographer: Brad M. Glorioso. Juvenile in water; Atchafalaya Basin, Louisiana. Lithobates catesbeianus - American Bullfrog
Source: USGS National Wetlands Research Center. Photographer: Brad M. Glorioso. Metamorph; Atchafalaya Basin, Louisiana. Lithobates catesbeianus - American Bullfrog
Source: USGS National Wetlands Research Center. Photographer: Brad M. Glorioso. Tadpole; Atchafalaya Basin, Louisiana. Lithobates catesbeianus - American Bullfrog