The American bullfrog (Lithobates catesbeianus) is the largest of all North American frogs. They can grow to a length of 8 inches or more and can weigh up to 1.5 pounds. Females are typically larger than males.
American bullfrogs - widely known as just "bullfrogs" in Canada and the United States - are the most wide-ranging of all North American amphibians. They are found in freshwater lakes, ponds and marshes from Nova Scotia, Canada to as far south as Mexico and Cuba.
Male bullfrogs produce loud calls - which sound a lot like a cow's moo - to both attract females and establish their territory.
Bullfrogs have an olive green back and sides covered with brown markings. Their bellies are white with either yellow or grey spots.
They eat crayfish, snails, water beetles, dragonfly larvae, fish, small turtles, young water birds and other frogs.
You can see American Bullfrogs in our exhibit "Frogs!" which explores the many shapes, sizes, adaptations and colors of frogs and toads - while also presenting the serious threats to amphibians worldwide.