Frogs by State

Frogs and Toads of Wyoming

Frogs and Toads of Wyoming

Frogs

True Frog Family – Ranidae

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American Bullfrog (Lithobates catesbeianus)

The American Bullfrog is the largest frog in the state. It lacks a dorsal ridge down it’s back while the other True Frogs have that ridge.

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Northern Leopard Frog (Lithobates pipiens)

The Northern Leopard Frog kinda looks like the Columbia Spotted Frog but the spots on the Leopard Frog are much larger and fully colored in. The Northern Leopard is found throughout the state.

Columbia Spotted Frog (Lithobates luteiventris)

The Columbia Spotted Frog is found more in the western part of the state. It’s spots are much smaller and irregular than the Leopard Frog’s.

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Wood Frog (Lithobates sylvaticus)

The Wood frog is the easiest frog to identify in the state. It’s dark mask around it’s eyes is a key give away. The frog varies in color from red, brown, and silver.

Tree Frog Family – Hylidae

Boreal Chorus Frog (Pseudacris maculata)

The Boreal Chorus Frog is the only Tree Frog in the state. It’s a small frog, only around a inch long.

Toads

True Toad Family – Bufonidae

The True Toads in the state have a parotoid gland behind their eye that creates the toxins for the toads.

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Wyoming Toad (Anaxyrus baxteri) by Sara Armstrong

The Wyoming Toad is a Federally Listed Endangered Species and listed by the IUCN Red List as Extinct in the Wild. The toad can be distinguished from the other toads in the state from it’s parallel cranial crests that sometimes get fused together to form what appears to be one line.

Western Toad (Anaxyrus boreas)

The Western Toad lacks a cranial crest or lines that run between the eyes.

Woodhouse’s Toad (Anaxyrus woodhousii)

The Woodhouse’s Toad cranial crests do not touch, creating opposing L shapes.

Great Plains Toad (Anaxyrus cognatus)

The Great Plains Toad does have a cranial crest and its V shaped. It’s found in the Eastern part of the state.

Spadefoot Toad Family – Scaphiopodidae

Spadefoot Toads are easy to seperate from the other toads and frogs because they have keratonized “spades” on their rear feet that are used for digging.

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Plains Spadefoot Toad (Spea bombifrons)

The Plains Spadefoot Toad has a more bony boss (bump between the eyes) than the Great Basin Spadefoot Toad. The toad is found in the eastern part of the state.

Great Basin Spadefoot Toad (Spea intermontana)

The Great Basin Spadefoot has a more glandular boss than the Plains Spadefoot Toad. It is found in the Southwestern part of the state.

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