American Bullfrog (Formerly Bullfrog)

American Bullfrog (Formerly Bullfrog)

Scientific Name: Lithobates catesbeianus (Formerly: Rana catesbeianus)

Family: Ranidae

Description & Size

  • Slimly, smooth skin
  • Extremely long hind legs
  • No lines (dorsolateral folds) that extends from head to the rear of the body on either side of the body
  • Large external eardrum (tympanum)
  • Total length:  8.9-20.3 cm (3.5-8.0 in)
  • Back color:  olive to bright lime green
  • Belly color:  white to light yellow


  • Any permanent body of water


  • Anything they can catch and eat
  • Invertebrates
  • Frogs
  • Reptiles
  • Birds
  • Small mammals

Life History

  • Nocturnal and diurnal (Carpenter and Morrison, 1973)
  • Active season:  March – early November
  • Breeding season:  Late April – July
  • Lays eggs
  • Up to 20,000 eggs per female


American Bullfrog (Formerly Bullfrog) Range

Additional Information

  • Currently the only frog species listed as invasive to Nebraska