Squirrel Treefrog
Hyla squirella

Description:
Small frog  (up to 1.75").  Color is greenish to brownish with line on upper lip.  Has dark spot between the eyes.  Changes color rapidly.
Similar Species:
Green treefrogs have well-defined  stripes that extend ... Pinewoods treefrogs have spots or "windows" on the inner thighs.  Barking treefrogs have spots on the back.

Pinewoods Treefrog
Hyla femoralis

Description:
Small frog (up to 1.75").  Usually dark brown color with dark irregular dorsal blotches:  may also be gray to light green.  Silvery to yellow window-like blotches on inner thighs.  Must be captured for positive identification.
Similar Species:
Green treefrogs have well-defined white or yellow stripes that extend laterally.   Squirrel treefrogs lack inner thigh markings.

Florida (Southern) Chorus Frog
Pseudacris nigrita verrucosa

Description:
Maximum length of 1.25".  The head and back are grayish with rows of dark gray blotches down the back and across... Skin is granular.  Upper lip is spotted with white.  Underside is white.
Similar Species:
...ket frogs have webbing between their hind toes; chorus frogs do not.   Cricket frogs also have warty skin.