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American Bullfrog, Lithobates catesbeianus

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Short description of Lithobates catesbeianus, American Bullfrog

Bullfrogs are up to twice the length of the native common frog, and draw attention by their loud, deep calls. Their ear drum is obviously larger than the eye, with a conspicuous dark outer ring. The lack of skin folds along the back, and the single vocal sac positioned beneath the chin, help to distinguish this from other non-native frogs in GB. Tadpoles grow to up to 15 cm.

Description of Lithobates catesbeianus, American Bullfrog status in GB

The American bullfrog is limited to a few populations in GB and has been the subject of targeted eradication.

Habitat summary: Lithobates catesbeianus, American Bullfrog

It occupies any type of still or slowly moving water, especially where aquatic and bank vegetation are abundant, in the native range from sea level to 2000m.  Calm water that will not dry out and deep pools in rivers and streams are preferred.

Overview table

Environment: Terrestrial and Freshwater
Species status: Non-Native
Native range: Eastern United States, Far East United States
Functional type: Predator
Status in England: Non-Native
Status in Scotland: Non-Native
Status in Wales: Non-Native
Location of first record: Bexhill (14)
Date of first record: 1996

Distribution map

Map of the UK with areas shaded to show the UK distribution of American Bullfrog

GB Distribution from NBN Atlas

Author's name:

John Marchant

Last updated:

May 30th, 2012

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