A critically endangered species in Alabama, the Mississippi gopher frog (Rana sevosa) is has a large head and is 4 inches long. The species differs from the closely related and more abundant gopher frog (Rana capito), especially in color. While the gopher frog is light gray to brown with dark markings, the Mississippi gopher frog is dark brown to gray. The underbelly areas are yellow in both species.
Cricket frogs have a dark triangle between their eyes and white warts on their backs. The northern cricket frog (Acris crepitans crepitans) is a small species, measuring about 1.5 inches. Its skin is camouflaged with grays, browns and greens. Northern cricket frogs and southern cricket frogs (Acris gryllus) are similar in appearance, but the northern frog has a much rounder snout and shorter back legs.
Treefrogs are often small frog species that live on trees. Alabama's species include the pine barrens treefrog (Hyla andersonii), a threatened species; the bird-voiced treefrog (Hyla avivoca), more common near the coast; the cope's gray treefrog (Hyla chrysoscelis), brownish and large, measuring in average 2 inches; the green treefrog (Hyla cinerea); the abundant pine woods treefrog (Hyla femoralis); the barking treefrog (Hyla gratiosa); and the squirrel treefrog (Hyla squirella), which measures about 1.5 inches.
Chorus frogs are members of the genus Pseudacris. Species native to Alabama include the upland chorus frog (Pseudacris feriarum feriarum); the southern chorus frog (Pseudacris nigrita nigrita), which is brown to tan and has a pointed snout with a white lip line; the ornate chorus frog (Pseudacris ornata), which can have a variety of colors, ranging from gray and brown to red and green; and the mountain chorus frog (Pseudacris brachyphona).