North American Bullfrog


The bullfrog is the largest true frog found in North America, weighing up to 0.5 kg and measuring 460 mm in length. The average length is 100-175 mm. The color varies from brownish to shades of green, often with spots or blotches of a darker color about the back. The hind feet are fully webbed.

The North American Bullfrog is found from Nova Scotia to central Florida, from the East coast to Wisconsin, and across the Great Plains to the Rockies.


Adults feed primarily on small invertebrates, but they also eat fish, other frogs, turtles, and even ducklings and mice! Tadpoles feed on algae and small plant materials.


Food Habits = Bullfrogs are predators. They usually feed on snakes, worms, insects, crustaceans, frogs, and tadpoles. There have also been a few cases reported of bullfrogs eating bats.Bullfrogs have strong rear legs with completely webbed feet and are highly aquatic.


Behavior = The bullfrog prefers warm weather and will hibernate during the cold. A bullfrog may bury itself in mud and construct a small cave-like structure under water for the winter. Their hunting style is 'sit and wait.' Bullfrogs wait for some type of prey to come by, then with a flash of the tongue, they grab it and bring it back into the mouth.


Habitat = The North American Bullfrog must live in water and is therefore usually found near some source of water, such as a lake, pond, river, or bog. Warm, still, shallow waters are preferred where they can hide from predators.

Preditors = Bullfrogs are amphibians. Many animals eat amphibians. In fact, some snakes eat only frogs. Fish eat the frog's eggs and tadpoles. Frogs have a hard time avoiding birds, which attack from the air.


The bullfrog helps to control insect pests. Also, bullfrogs are important for medical research because their skeletal, muscle, digestive, and nervous systems are similar to those of higher animals. They are often hunted for meat (frog legs).

The average bullfrog lives seven to nine years.