Bullfrog Lithobates catesbeianus

Photo by D. Becker.
Description: 5 - 7 inches. Bullfrogs are green, and may have darker green or brown mottling. The belly is light colored, but it may also be mottled giving it a darker appearance. There is a ridge behind each eye that wraps tightly around the ear drum (tympanum).

Similar Species: Green Frogs are similar in appearance, but the ridge behind the eye extends down the length of the body.

Comments: Considered native to extreme southeastern Minnesota (Houston and Winona counties), introduced and invasive elsewhere in the state. Please do NOT release bullfrog tadpoles into water gardens or natural wetlands.

Distribution Map
Distribution of the Bullfrog (Lithobates catesbeianus)

This map is generated from data provided by the Bell Museum of Natural History and HerpMapper.org. Please help us keep it up-to-date by submitting your amphibian and reptile observations.

Phenology of Bullfrog (Lithobates catesbeianus)

Chorus of bullfrogs. Courtesy of Chris Harrison.

Chorus of bullfrogs. Courtesy of Chris Harrison.