Bird-Voiced Treefrog  (Hyla avivoca)

Similar in appearance to the gray treefrog, but with a greenish wash rather than a yellow color along the inner thigh, is the bird-voiced treefrog, Hyla avivoca.  This small frog is 1 and a half to 2 inches in length and is found only in the undisturbed tupelo and cypress swamps in the western portion of Kentucky.  Its high-pitched bird-like whistling song is produced from