The American bullfrog is the largest frog native to North America, a voracious generalist predator that eats nearly anything it can fit into its enormous mouth. It is considered one of the world’s most harmful invasive species outside its native range, having devastated amphibian populations across Europe, South America, and Asia by outcompeting native species and spreading the deadly chytrid fungus. Males produce a resonant bass bellow audible more than a kilometre away.
About the Bullfrog
Lithobates catesbeianus
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💡 Fun Facts
01
American bullfrogs eat virtually anything animate that fits in their mouth, including mice, snakes, bats, other frogs, and even small birds.
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Tadpoles can take up to two years to metamorphose in cold northern climates, spending entire winters frozen in pond mud.
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The male's territorial bellow is produced by forcing air over vocal cords and into two inflatable vocal sacs, generating resonance down to 100 Hz.
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Bullfrogs have no external ears — their 'ears' are the large, visible tympanic membranes behind each eye that vibrate directly.
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They are listed among the 100 worst invasive species globally, having contributed to the extinction or decline of native amphibians on every continent where they have been introduced.
📍 Where to Find This Animal
Habitat Types:
Freshwater Wetlands
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