Bull frog at Sacramento National Wildlife Refuge Complex

Bullfrog young adult,Baskett Slough National Wildlife Refuge, OR

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Red-legged frog species survived wildfire in Tahoe forest

Bull frog at Sacramento National Wildlife Refuge Complex

Sacramento National Wildlife Refuge Complex

American Bullfrog (Lithobates catesbeianus)

Sacramento National Wildlife Refuge Complex

Bullfrog - Presidio of San Francisco (U.S. National Park Service)

Bullfrog Action Group

Willapa National Wildlife Refuge Complex

U.S. Fish and Wildlife Service - Northern river otters love fish

American Bullfrog (Lithobates catesbeianus) - Species Profile