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Indiana Department of Natural Resources

Indiana Department of Natural Resources

Fish & Wildlife > Nongame & Endangered Wildlife > Frogs & Toads of Indiana > Bullfrog Bullfrog

Bull FrogDescription

3 ½-6” (9-15.2cm). Dark brown, greenish gray, light olive, or yellowish green. No continuous dorsolateral ridges; ridge begins behind eye and curves around external eardrum, down to front leg. Large external eardrum. Feet fully webbed except longest toe. Belly cream colored. Males have yellow throats during breeding season.

Call Description

“Brr-wum” sound slowly repeated at intervals of several minutes. Deep bass sound.

Indiana Range



Anything it can swallow including, crayfish, insects, worms, and snails. Large frogs will eat other frogs, small snakes, mice, and birds.


Ponds, lakes, stock ponds, strip mine ponds, permanent marshes, and backwaters of larger streams.

Breeding Habitat

Permanent bodies of water.

Breeding Season

May-end of July.


Deposited in a large surface film containing 10,000 or more eggs. Mass may cover up to five square feet. Hatch in 2-5 days.


Olive green with a white or cream belly. Similar to green frog tadpoles. Most tadpoles overwinter and transform the next summer, some may take two years.