Wood Frog Rana sylvatica
Wood frogs have a characteristic dark mask around the eyes. There is
a great variation in the color of the wood frog -- from pink, to brown,
to black. No matter what color is described the dark mask is always present.

Wood Frog sounds (371 K)
Western Chorus Frog Pseudacris triseriata
Western chorus frogs are North Dakota's smallest frogs, reaching a body
length of 1 1/2 inches. Colors range from buff to gray, or green with three
dark stripes down the back. Chorus frogs have small adhesive disks like
tree frogs, but they do not climb.

Chorus Frog sounds (195 K)
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