Frogs and Toads of Louisiana
The American Bullfrog is the largest frog in the North America. It looks very similar to the Green Frog but the dorsal ridge wraps around the tympanum while the Green Frog’s dorsal ridge is incomplete and does not extend all the way to its rear. The American Bullfrog is also very similar to the Pig Frog but the Pig Frog has bolder spots / stripes on the back of its thighs while the Bullfrog has light spots.
Pickeral Frog and the Southern Leopard Frog look very much a like. The Pickeral Frog has more square shaped spots on its back while the Southern Leopard frog 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 typanum.
The Dusky Gopher Frog was historically found in Louisiana but hasn’t been sighted in the state for at least 20 years.
The Cricket Frogs look really similar but there’s a few ways to tell them apart. The Southern Cricket Frog has a more pointed snout while the Northern Cricket Frog has a more blunt snout. The Southern Cricket Frog doesn’t have as much webbing on the back legs as the Northern Cricket Frog.
The Gray Tree Frog and the Cope’s Gray Tree Frog are identical besides their calls and chromosome numbers.
The Cope’s Gray Tree Fro,, the Eastern Gray Tree Frog, Pinewoods Frog, and the Bird-Voiced Frog look very much a like. The difference is the coloration on the inner thigh. Cope’s Gray Tree Frog and Gray Tree Frog has brighter orange color on the thigh while the Bird-Voiced Frog is more greenish-yellow. The Pinewoods Frog has dots / spots on the inner thigh.
The Green Tree Frog, Squirrel Tree Frog , and Barking Tree Frog are all very similar. The Barking Tree Frog has much rougher skin than the others. The Green Tree Frog has a white line down its back.
The Spring Peeper is known for it’s X shape on it’s back. It’s call is one of the first signs of spring.
The Cajun Chorus Frog is the most common chorus frog you will see in the state. It has three stripes down it’s back.
Strecker’s Chorus Frog is listed as S1 (critically imperiled in Louisiana because of extreme rarity (5 or fewer known extant populations)) by the state. It’s found on the eastern part of the state.
The Ornate Chorus Frog lacks any solid stripes down it’s back if you are lucky to see one. They have been listed as extirpated from the state. Historically, they were found in Southeastern part of the state.
The Oak Toad is the most easily identifiable toad out of the group of four. It is the smallest of the group and has a light line down its back. The Oak Toad also has orange on the bottom of its feet. The remaining three species of toads in Alabama are a lot harder to distinguish between. To identify the differences, you have to look at the top of the head. The Southern Toad has knobs on the back of its head. The Fowler’s Toad’s parotid gland touches its post orbital ridge around its eye while the American Toads’s parotid gland does not touch or connected to it by a spur. Here’s an easy map I found that helps me.
The Gulf Coast Toadis notable from the other toads because its in a different genus Incilius. This genus has a more defined cranial crest than Anaxyrus.
The Eastern Spadefoot Toad and the Hurter’s Spadefoot Toad look a like. They both have sickle shaped spades on their feet. The Hurter’s Spadefoot Toad has a boss or bump between the eyes and the Eastern Spadefoot doesn’t.
The Eastern Narrow Mouthed Toad is the only narrowed mouth toad in the state. It lacks spades on it’s feet and paratoid gland behind it’s eye.
The Rio Grande Chirping Frog was possibly introduced to the state through the import of plants for greenhouses.
The Green House Frog was accidentally introduced by shipments of plants, hence the name Green House Frog. They can eat native animal species.
The Cuban Tree Frog is a large tree frog from obviously Cuba. They have a gigantic appetite which causes them to be highly destructive to the ecosystem.