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Male green frog, Isle Royale National Park, 2015.

Visitors near ponds may hear what sounds like an old banjo. Unless there happens to be an actual banjo-playing backpacker around, what you are really hearing is a green frog (Rana clamitans). This frog may be any shade of swamp green or brown with a yellow throat. This species is sexually dimorphic: males are smaller than females, the male tympanum is twice the eye diameter while the female tympanum is about half the eye diameter and males have bright yellow throats. Keen observers may witness them sitting along the shore looking for an insect snack.

U.S. National Park Service

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Isle Royale National Park, Code: ISRO

National Park Service Facebook Photos

Title: Isle Royale National Park
URL: https://www.facebook.com/pages/Isle-Royale-National-Park/127161610664143?fref=ts

20150708

07/08/2015

Public Can View

Organization: Isle Royale National Park
Address: 800 East Lakeshore Drive, Houghton, Michigan 49931-1896

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