American Bullfrog

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• Adopt a Catchment

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  • Amphibian Conservation 

  • Wyoming’s Amphibians 

    • Northern Leopard Frog (Lithobates pipiens)

    • Wood Frog (Lithobates sylvaticus)

    • Columbia Spotted Frog (Rana luteiventris)

    • Boreal Chorus Frog (Pseudacris maculata)

    • American Bullfrog (Lithobates catesbeianus)

    • Wyoming Toad (Anaxyrus baxteri)

    • Western (Boreal) Toad (Anaxyrus boreas)

    • Rocky Mountain (Woodhouse’s) Toad (Anaxyrus woodhousii)

    • Great Plains Toad (Anaxyrus cognatus)

    • Plains Spadefoot (Spea bombifrons)

    • Great Basin Spadefoot (Spea intermontana)

    • Western Tiger Salamander (Ambystoma mavortium)

  • Calls of Wyoming's Frogs & Toads

  • Amphibian Survey Training Video 

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• Project Results

Identification

• Largest frog in Wyoming (may be introduced)
• Size: ~2 inches (metamorph) to ~6 inches (adult)
• Dorsal color: light green to dark olive or brown
• Dark spots or dark mottling
• Ventral color: cream to yellow with dark mottling
• Dorsolateral folds end behind the tympanum (not continued down back)
• Mp3 of call (courtesy of Gary Nafis, californiaherps.com; contact Gary for permission to use on other websites)

Photo to right: dannymartinphotography.com

Eggs & Tadpoles

• Eggs in large floating sheet on the surface (1 to 5 feet wide with up to 20,000 eggs)
• Tadpoles olive-green above with gold metallic flecks and lots of small dark spots on the body, tail muscle, and tail fin; cream to yellow bellies
• Tadpoles can reach up to 5.5 inches
• Tadpoles eyes are medial, the anal vent is on the side​​​​​​​

Photos above: Wyoming Game and Fish Department

Breeding Habitat

Shallow portions of permanent water bodies with lots of vegetation; prefer warm water.

                                                                                        

Photo by Wyoming Natural Diversity Database

Native Range

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Map by Wyoming Natural Diversity Database