Family: Bufonidae (True Toads)
Genus: Bufo (True Toads)
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| Dwarf American Toad
Bufo americanus charlesmithi
| Color variable, though usually a rusty-red. Skin dry with 1-2 warts per dark spot (some individuals without spots). Chest speckled with black. Parotoid gland kidney-shaped and separated from eye ridge or attached by spur. Known to hybridize with other True Toads. Call a melodic trill.
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| Fowler's Toad
Bufo fowleri
| Color variable, though usually shades of brown. Skin dry with 3 or more warts per dark spot. Chest usually plain or with one breast spot. Parotoid gland oval-shaped and touching eye ridge. Known to hybridize with other True Toads. Call a short "whaaat".
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| Coastal Plain Toad
Bufo nebulifer
| Rare with only one known locality in AR. Color variable, but with dark lateral stripe bordered above by light stripe. Skin dry and warty. Parotoid glad triangular with eye crests forming a deep crease on head. Call a series of "wooden rattle" trills.
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| Rocky Mountain Toad
Bufo woodhousii woodhousii
| Color variable, though usually grayish. Skin dry with the number of warts variable (1 or more) per dark spot. Chest usually plain. Parotoid gland oval-shaped and touching eye ridge. Known to hybridize with other True Toads. Call a short "whaaat".
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Family: Hylidae (Treefrogs)
Genera: Acris (Cricket Frogs), Hyla (Treefrogs), and Pseudacris (Chorus Frogs)
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| Northern Cricket Frog
Acris crepitans crepitans
| Small. Highly variable in color (browns, grays, greens, etc.) and pattern (plain, mottled, etc.). Back of head with darker triangular mark (not always obvious). Upper lip with 4-5 dark bars (not always obvious). Call cricket-like clicks, or as though two small pebbles were being chipped together.
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| Bird-voiced Treefrog
Hyla avivoca
| Rare. Highly variable and can change colors, but usually shades of green and/or gray. Toe pads sticky. Skin smooth. Inside of legs yellowish-green. White spot under eye. Call bird-like with 2-5 whistles per second.
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| Cope's Gray Treefrog
Hyla chrysoscelis
| Species of Gray Treefrog Complex (diploid). Highly variable and can change colors, but usually shades of green and/or gray. Toe pads sticky. Skin granular. Inside of legs bright yellowish-orange. White spot under eye. Call a fast trill.
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| Green Treefrog
Hyla cinerea
| Color bright green with a prominent white stripe from upper lip to thigh. Toe pads sticky. Skin smooth. Call a duck-like quack.
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| Gray Treefrog
Hyla versicolor
| Species of Gray Treefrog Complex (tetraploid). Highly variable and can change colors, but usually shades of green and/or gray. Toe pads sticky. Skin granular. Inside of legs bright yellowish-orange. White spot under eye. Call a slow trill.
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| Spring Peeper
Pseudacris crucifer
| Small. Color varying shades of tan and brown. Darker cross pattern on back. Toe pads sticky. Call in early spring a loud "peep". 
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| Upland Chorus Frog
Pseudacris feriarum
| Small. Color grays and browns. Dark stripe from snout to groin. 3 dark, thin (and usually broken) dorsal stripes. Upper lip light. Call a "thumbnail raking a plastic comb" (from low to high pitch).
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| Strecker's Chorus Frog
Pseudacris streckeri ssp.
| Rare. Color grayish or tanish. Dark, irregular dorsal blotches; sometimes very faint or not present. Dark stripe from eye to shoulder. Groin often yellow. Call a bell-like whistle.
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Subspecies: Illinois Chorus Frog (P. s. illinoensis)  and Strecker's Chorus Frog (P. s. streckeri)
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| Western Chorus Frog
Pseudacris triseriata
| Rare. Small. Color grays and browns. Dark stripe from snout to groin. 3 dark, broad dorsal stripes. Upper lip light. Call a "thumbnail raking a plastic comb" (from low to high pitch).
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Family: Microhylidae (Microhylid Frogs and Toads)
Genus: Gastrophryne (Narrowmouth Toads)
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| Eastern Narrowmouth Toad
Gastrophryne carolinensis
| Small and squat. Mottled brown. Belly mottled black and grey. Head small and very pointed. Fold of skin behind eyes. Call a loud, long "baaaw of a dying sheep".
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| Great Plains Narrowmouth Toad
Gastrophryne olivacea
| Small and squat. Light gray (sometimes with a few small black specks). Belly plain. Head small and very pointed. Fold of skin behind eyes. Call a short "peep" followed by an "angry bee" buzz.
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Family: Ranidae (True Frogs)
Genus: Rana (True Frogs)
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| Crawfish Frog
Rana areolata ssp.
| Rare. Large. Covered in large, dark spots ringed with light borders. Dorsolateral fold. Call a loud, deep "snoring hog".
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| Subspecies: Southern Crawfish Frog (R. a. areolata) and Northern Crawfish Frog (R. a. circulosa)
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| Plains Leopard Frog
Rana blairi
| Rare with only a single vouchered specimen from AR. Color shades of brown (never green) and always spotted like a "leopard". Spots round and random. Dark spot on snout. Light spot on tympanum. Distinct light line on upper lip. Dark bars on back legs. Dorsolateral fold broken near groin. Inside thigh yellowish. Call a series of 2-3 throaty "gulps".
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| Bullfrog
Rana catesbeiana
| Very large as adult. Green or brown (usually rather patternless). Tympanum large with fold of skin wrapping around it. Dorsolateral fold absent. Call a low-pitched "bellowing bull".
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| Green Frog
Rana clamitans ssp.
| Very large as adult. Green or bronze (usually rather patternless). Tympanum large. Dorsolateral fold present. Call a "loose banjo string".
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| Subspecies: Bronze Frog (R. c. clamitans) and Green Frog (R. c. melanota)
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| Pickerel Frog
Rana palustris
| Metallic-like sheen. Light gray, tan, or yellowish background with leopard-like dark spots. Spots on back squarish and paired. Dark bars on back legs. Inside thigh yellowish. Dorsolateral fold. Call a quiet, low-pitched, 1-2 second "snore".
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| Southern Leopard Frog
Rana sphenocephala utricularius
| Color shades of green or brown and always spotted like a "leopard". Spots round and random. No dark spot on snout. No distinct spot on tympanum. Light line on upper lip. Dark bars on back legs. Dorsolateral fold not broken (or, if broken, in the same line). Inside thigh not yellowish. Call a series of quiet "chuckling quacks".
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| Wood Frog
Rana sylvatica
| Rare. Smallish. Tan with a distinctive black "mask" and light upper lip. Dorsolateral folds. Call a quiet "hoarse duck".
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Family: Scaphiopodidae (North American Spadefoots)
Genera: Scaphiopus (Southern Spadefoots) and Spea (Western Spadefoots)
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| Eastern Spadefoot
Scaphiopus holbrookii
| Rare. Color variable, but usually brownish. Two light dorsal lines. Skin moist. Parotoid glands not obvious. No raised bump between eyes. Eye pupils vertically elliptical. Dark "spade" on bottom of foot long and sickle-shaped. Call a loud "grunt".
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| Hurter's Spadefoot
Scaphiopus hurterii
| Rare. Color variable, but usually greenish. Two light dorsal lines. Skin moist. Parotoid glands not obvious. Raised bump between and slightly behind eyes. Eye pupils vertically elliptical. Dark "spade" on bottom of foot sickle-shaped. Call a loud "grunt".
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| Plains Spadefoot
Spea bombifrons
| Rare with only two known localities in AR. Color grayish or bluish with small, red spots. Skin moist. Parotoid glands not obvious. Raised bump between eyes. Eye pupils vertically elliptical. Dark "spade" on bottom of foot rounded. Call a short "snore".
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