Difference between Green and Gray Treefrogs
Cope's Gray Treefrog
Cope's Gray Treefrogs can range from gray to nearly solid green like this one. There is no white strip on the side of the body. A light colored path is usually present below the eye.
Green Treefrog
Green Treefrogs typically have a distinct white strip running down each side of the body. Yellow spots are sometimes present on the back.