Cope's Gray Tree Frog (Hyla chrysoscelis)

Hear what this frog's call sounds like!
Calls courtesy of Dr. Alan J. Wolf, Center for Biology Education/Biology New Media Center

These frogs are medium-sized (about 2 inches) and spend most of their adult lives in small trees, searching for food among the branches. Their appearance can be very different from each other, but almost all of these frogs have a bright orange skin inside their hind legs.

These frogs' calls, like the bullfrog's, are a high pitched trill.

Photos courtesy of Jeff LeClere at

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