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To report an AIS
sighting or to find out
more information call

Questions or comments regarding the state's Aquatic Invasive Species and Ballast Water Management Programs may be directed to:

Allen Pleus
AIS Coordinator
(360) 902-2724

View WAC 220-12-090
Classification - Nonnative aquatic
animal species with photos

Rana catesbeiana (Bullfrog)

Animal Amphibians
Family: Ranidae
Classification: Prohibited


The bullfrog is one of the largest “true” frogs, with a body length between three and eight inches, with back legs seven to ten inches long. They are usually green to greenish brown. They do not have the two parallel lines of raised glandular skin between the back and sides that are often found on similar frog species such as the Green frog or the Bronze frog. They have a ridge (dorsolateral fold) that starts behind the eyes and sweeps back and down around the ears. Their ears (tympanic membranes) are quite large.

The bullfrog is nocturnal, and a voracious hunter. Large specimens prey upon small birds, young snakes, crayfish, other frogs, and minnows. The frog has been introduced into many areas outside its natural range. Possibly by people interested in commercially harvesting frogs' legs.