description American Bullfrog Overview
The American Bullfrog (Lithobates catesbeianus) is the largest frog native to North America, reaching up to 20 cm, and has been introduced to Europe, Asia, and South America where it is considered an invasive pest.
insights Why this score
American Bullfrog ranks #42 of 216 in the Amphibian ranking, behind Phantasmal Poison Frog, ahead of Lemur Leaf Frog.
Iconic size, booming call, broad recognition, strong ecological impact; invasive reputation tempers appeal.
help American Bullfrog FAQ
How large can an American Bullfrog grow?
Large adults can reach roughly 20 cm in body length, excluding the legs. Their size, deep call, and very large tympanum help distinguish them from many other North American frogs.
Why is the American Bullfrog invasive outside North America?
It is a powerful generalist predator that eats insects, fish, reptiles, birds, and other amphibians. Introduced populations can also compete with native frogs and contribute to the spread of amphibian disease.
What does an American Bullfrog's call sound like?
The male's call is a deep, resonant bellow often rendered as jug-o-rum. It carries across ponds and lakes during the breeding season.
How long do American Bullfrog tadpoles remain in the water?
Development varies strongly with climate and water temperature. In cooler regions, tadpoles may overwinter and remain aquatic for more than one year before metamorphosis.
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