Green Frog (female)

I photographed a Green Frog (Lithobates clamitans) alongside the boardwalk in the hemi-marsh at Huntley Meadows Park on 02 April 2014. This individual is probably a female, as indicated by the size of its tympanum (eardrum).

Green frogs are variable in color and pattern, but can be differentiated from similar species — such as bullfrogs and leopard frogs — by the dorsolateral ridges that run from behind each eye to about three-quarters of the way down the back. In leopard frogs, the ridge continues all the way down the back and bullfrogs lack these ridges altogether. Females and males can be differentiated by the size of the tympanum (the eardrum, located behind the eye and below the dorsolateral ridge). In females, it is about the same size as the eye and in males it is much larger than the eye. Source Credit: Northern green frog, a Project Noah spotting by Kara Curtain/Jones, graduate student and teaching assistant at George Mason University, Department of Environmental Science and Policy.

Green Frog (Lithobates clamitans)

Green Frog (Lithobates clamitans)

Green Frog (Lithobates clamitans)

Copyright © 2015 Walter Sanford. All rights reserved.

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