Frogs by State

Frogs and Toads of Colorado

Frogs and Toads of Colorado


True Frog Family – Ranidae

Wood Frog

The Wood Frog is easy to identify because of the dark mask on its face.

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American Bullfrog

The American Bullfrog is the largest native frog in the United States. There is no dorsal ridge that runs down its back on the American Bullfrog. This is the distinguishable characteristics of the frog.

Plains Leopard Frog
Northern Leopard Frog

The Northern Leopard Frog and Plains Leopard Frog appear identical. They both have large spots all over their body. The difference between the frogs lies in their dorsal ridge. The Northern Leopard Frog’s ridge runs straight down the side while the Plains Leopard Frog’s ridge indents near the butt.

Tree Frog Family – Hylidae

Canyon Tree Frog

No stripe through eye. Skin is rather rough. Has distinct toe-pads used for climbing

Boreal Chorus Frog

Three lines down back. No toe pads.

Northern Cricket Frog

The Northern Cricket Frog is the only frog in the state. No distinct marks. No toe pads


True Toad  Family – Bufonidae

Great Plains Toad

V shaped Cranial Crest

Woodhouse’s Toad

Opposing L shaped cranial crests

Western Toad

No cranial crest, Has stripe down middle of back.

Green Toad

No cranial crest. No stripe down middle of the back.  elongated parotoid gland.

Red Spotted Toad

No cranial crest. No stripe down middle of the back. Parotoid gland is also rather small.

Spadefoot Toad Family – Scaphiopodidae

Couch’s Spadefoot Toad

Sickle-shaped Spade

Great Basin Spadefoot Toad

Round-shape Spade, glandular boss

Mexican Spadefoot Toad

Round-shape Spade, no boss

Plains Spadefoot Toad

Round-shape Spade, bony boss

Narrow Mouthed Toad Family – Microhylidae

Western Narrow Mouthed Toad

The Western Narrowed Mouth Toad is the only narrowed mouth toad in the state. It’s not a true toad because it lacks a parotoid gland behind its eye and doesn’t have a keratonized spade on its rear feet.


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