Frogs and Toads of Oklahoma
Oklahoma is home to a great variety of frogs and toad species.
Frogs in the state are from two different families, Hylidae – the Tree Frogs, and Ranidae – the True Frogs.
The Green Frog has partial dorsal ridge down the side of their body.
The American Bullfrog is the largest frog in the state. Their dorsal ridge wraps around their tympanum.
The Wood Frog (Lithobates sylvaticus) is an easy to identify because of their dark mask around their eyes.
The Plains and Southern Leopard Frog can be hard to tell apart. The Southern Leopard Frog’s dorsal ridge down their back is unbroken while the Plains dorsal ridge can be broken.
Pickeral Frog and the Leopard Frogs look very much a like. The Pickeral Frog has more square shaped spots on its back while the Leopard frogs has more circular ones.
The Crawfish Frog gets its name from living in crawfish holes. Its has skin fold on the side and a small tympanum.
The Northern Cricket Frog is the only cricket frog in the state. Its skin is relatively more rough than the other tree frogs in the state. It also has no distinct markings.
Tree Frogs – Hyla
These two frogs are identical besides their calls and chromosome numbers. These tree frogs are also larger than the ones below. Also note that Gray Tree Frogs are not always gray and can be green.
The Gray Tree Frogs and the Bird-Voiced Frog look very much a like. The difference is the coloration on the inner thigh. The Gray Tree Frogs have brighter orange color on the thigh while the Bird-Voiced Frog is more greenish-yellow.
The Green Tree Frog and the Squirrel Tree Frog look very much alike. The Green Tree Frog has a white stripe that runs down their side.
Chorus Frogs – Pseudacris
The Spring Peeper is a notoriously loud frog and one of the first signs of spring. It has a noticeable X marking on its back.
The Boreal Chorus Frog has three lines that run down its back and are rarely broken up but if they are, its usually only the middle stripe.
Cajun Chorus Frog has three stripes that run down its back that are often broken up and can appear as spots.
The Strecker’s Chorus Frog lacks doesn’t have any pattern of stripes or dots on its back. It has a line that runs through its eye and down its side though.
The Spotted Chorus Frog obviously has spots that are green and are bordered by black.
The American Toad’s cranial crest and the parotoid gland to not touch or they are connected by a spur. Its found on the eastern part of the state.
The Fowler’s Toad appears similar to the American Toad. Their postorbital ridge touches their parotid gland. They also have a white belly while the American Toad’s is speckled.
The Red-Spotted Toad is found in the western half of the state. Cranial crest are not present or small. Parotoid gland is also rather small.
The Green Toad is found along the southwestern part of the state. It doesn’t have a prominent cranial crest but has an elongated parotoid gland.
The Texas Toad ‘s cranial crests absent or weak with no stripe down its back. The tubercles on its feet are black and sharp edged.
The Woodhouse’s Toad has opposing L shaped cranial crests.
The Great Plains Toad has V shaped cranial crest
The Hurter’s Spadefoot Toad has a sickle-shaped spade on their rear foot and have a boss / bump between the eyes.
The Couch’s Spadefoot Toad has a sickle-shaped spade and has no boss / bump between the eyes.
.The Plains Spadefoot Toad has a bony boss / bump between its eyes and round spade on its rear feet that can help identify it.
The Mexican Spadefoot Toad has no boss between its eyes and has a round spade on its rear feet.
The Eastern Narrow Mouthed Frog is found on the eastern edge of the state. It has a dark belly and often has a broad line down its back.
The Western Narrow Mouthed Toad is found in the middle of the state. It has a light, unmarked belly and has no patterns and a few spots on its back.