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Cope's gray treefrog call: Its call is a faster trill than that of the Eastern gray treefrog, though the two species are identical in appearance.; Format: audio

Eastern gray treefrog call: Cope's gray treefrog and the Eastern gray treefrog are identical in appearance, but Cope's gray treefrog has a faster trill.; Format: audio

Gray treefrog: Format: image/photograph

Gray treefrog: This gray treefrog was found sunning himself on the window of LEARN NC's office suite. He may be an Eastern gray treefrog (Hyla versicolor) or a Cope's gray treefrog (Hyla chrysoscelis); the appearance of the...; Format: image/photograph

Gray treefrog with visible leg coloration: This gray treefrog was found sunning himself on the window of LEARN NC's office suite. He may be an Eastern gray treefrog (Hyla versicolor) or a Cope's gray treefrog (Hyla chrysoscelis); the appearance of the...; Format: image/photograph

Belly and legs of gray treefrog: This gray treefrog was identified as a Cope's gray treefrog (Hyla chrysoscelis), but this species of treefrog is identical in appearance to the Eastern gray treefrog (Hyla versicolor). Both species have yellow-orange...; Format: image/photograph

LEARN NC, a program of the University of North Carolina at Chapel Hill School of Education, finds the most innovative and successful practices in K–12 education and makes them available to the teachers and students of North Carolina — and the world.