Invasive Animal

Green Frog

Lithobates clamitans

About This Species

Green frogs are native to Eastern North America, including Ontario, Quebec, the Maritime provinces, and Southeastern Manitoba. In BC, they have established throughout the Fraser Valley from Metro Vancouver to Hope, throughout the Sunshine Coast, and in Southeastern Vancouver Island from Victoria to Parksville.

Green frogs inhabit ponds, the shallow ends of lakes and wetland areas. They feed on small fish, tadpoles and various aquatic invertebrates. They may outcompete native frogs for nesting habitat and food. Green frogs are known to displace Oregon spotted frog (Rana pretiosa), an endangered species in BC (COSEWIC 2011).

How to Identify

Adult Green frogs are 5-10 cm long, not including their legs. Colouration varies from emerald green to olive green to brown, they may or may not have dark splotches along their backs and legs. The bellies are lighter than the backs, typically yellow. They have large eardrums right behind their eyes.

Green frogs look similar to the American bullfrog (Lithobates catesbeianus). There is one easy way to tell them apart – Green frogs have a raised ridge of skin that starts behind their eyes and goes most of the way down their backs. American bullfrogs lack this ridge of skin.

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