Comparing calls of two species of Gray Treefrog

The two species of Gray Treefrog in North America are morphologically indistinguishable, but you can tell them apart by their calls. Hyla chrysoscelis (Cope's Gray Treefrog) has a much faster trill than Hyla versicolor (Gray Treefrog). You can hear the difference between the two species in this video. First is Hyla chrysoscelis, followed by Hyla versicolor.

 

Frog and Toad Calling Videos

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