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American bullfrog, Acadia National Park, 2014.

The American bullfrog (Rana catesbeiana) belongs to the family of 'true frogs', Ranidae. Easily identified by the tympanum, or eardrum, easily seen just behind the eye. Also notice the green upper lip, off-white under body and large brown irises with horizontal, almond-shaped pupils. This species is sexually dimorphic: males are smaller and have yellow throats. Males tympani are larger than their eyes, whereas tympani in females are about the same size as the eye.

U.S. National Park Service

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Acadia National Park, Code: ACAD

National Park Service Facebook Photos

Title: Acadia National Park
URL: https://www.facebook.com/AcadiaNPS?fref=ts

20140604

06/04/2014

Public Can View

Organization: Acadia National Park
Address: PO Box 177, Bar Harbor, ME 04609-0177

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