Physical Description
Wood frogs range from 51 millimetres (2.0 in) to 70 millimetres (2.8 in) in length. Females are larger than males. Adult wood frogs are usually brown, tan, or rust colored, and usually have a dark eye mask. Individual frogs are capable of varying their color; Conant (1958) depicts one individual when light brown and dark brown at different times. The underparts of wood frogs are pale with a yellow or green cast.
If you see a small brown frog with a dark eye mask in the woods, it is likely to be a wood frog. There are no other species with a similar appearance to the wood frog in North America. The first evasive leap is fast and long. Close observation will often glimpse a second short dive under the leaf litter, making the frog appear to disappear.
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