Bufo terrestris (Southern Toad).
Size: approx. 50 mm. Photo: 07/31/12, 9 pm.

The Southern Toad (Bufo terrestris) has pronounced knobs and crests on its head. Two crests extend forward from the knobs and come close to one another near the snout. It has only one or two warts. Secretion from the parotoid glands (located at the back of the head) is not toxic but might act as an irritant to human mucous membranes. 


Hyla squirella (Squirrel Treefrog).
Size: approx. 25 mm. Photo: 11/22/11, 10 am.

Hyla squirella has a length of 1 to 1.5 inches and varies in color (and pattern) from the typical green to shades of yellow and brown. Furthermore each individual frog can change their colors similarly to a chameleon. Squirrel treefrogs are also called "rain frogs" because during and after rain showers their call sounds like a chattering squirrel. 
U Georgia:

Lithobates catesbeianus (American Bullfrog).
Photo: 04/05/20.

An expert at UF helped me to identify this pool guest as an American Bullfrog. Their body is greenish with a white belly. They are marked with a dark, net-like pattern. Like all "true frogs," they have large eardrums and webbed hind feet. Male bullfrogs gather into groups called choruses. In some parts of the US, the bullfrogs' rear legs are eaten resembling small chicken drumsticks.  
University of Florida: