Frogs by State

Frogs and Toads of Pennsylvania

Frogs and Toads of Pennsylvania


True Frog Family – Ranidae

American Bull Frog (Lithobates catesbianus)
Green Frog (Lithobates clamitans)

The American Bullfrog and the Green Frog are similar but the American Bullfrog is larger. The Green Frog also has a impartial dorsal ridge while the American Bullfrog does not have one.

Pickeral Frog (Lithobates palustris)
Atlantic Coast Leopard Frog (Lithobates kauffeldi)
Northern Leopard Frog (Lithobates pipiens)

Pickeral Frog, Northern Leopard Frog, and Atlantic Coastal Leopard Frog look very similar to each other because of the spots but the Pickeral frog’s spots are more rectangular than the Northern Leopard / Atlantic Coastal Frog. Now for Atlantic Coast Leopard Frog vs Northern Leopard Frog, the Atlantic Coastal Frog has more white in its tympanum than the Northern.

Wood Frog (Lithobates sylvaticus)

The Wood Frog is a very easy to identify frog. It has a raccoon like mask around its eyes.

True Frog Family – Hylidae

Cope’s Gray Tree Frog (Hyla chrysoscelis) and Eastern Gray Tree Frog (Hyla veriscolor)

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. They also have a yellow to orange color on their back legs.

Northern Cricket Frog (Acris crepitans)

Northern Cricket Frog is the only cricket frog in the state. It does not have any distinct markings on its back.

Spring Peeper (Pseudacris crucifer)

The Spring Peeper’s call is one of the first sign of spring. For a small frog, it has a loud call. The Spring Peeper has a noticeable X on its back that makes it easy to identify.

Midland Chorus Frog (Pseudacris triseriata)
Upland Chorus Frog (Pseudacris feriarum)
New Jersey Chorus Frog (Pseudacris kalmi)

The Midland, Upland, and New Jersey Chorus frogs appear very similar. The Upland Chorus frog’s stripes on their back can be broken while the other two’s stripes are usually not broken besides sometimes the middle. The Midland is located more at the western state line while the Upland lives in more South-central Pennsylvania. New Jersey Cricket Frog is located in the East.


True Toad Family – Bufonidae

American Toads (Anayxrus americanus)
Fowler’s Toads (Anayxrus fowleri)

The Fowler’s Toad and the American Toad look very much a like but there are some differences in the back of the head.


The American Toad’s parotid gland is separated from the cranial crest while the Fowler’s Toad’s touches.

Spadefoot Toad Family – Scaphiopodidae

Eastern Spadefoot Toad (Scaphiopus holbrookii)

The Eastern Spadefoot toad is the only Spadefoot toad in the state. If a toad has a spade on its rear foot, then its this toad.


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