Green Anole, still fairly common in South Florida, although they are slowly being crowded out by Cuban Anoles, which arrived from (probably) the Bahamas aboard boats. These lizards are able to change color from their bright green to a dark reddish-brown, depending on the surface. Green is the "normal" color when they can't blend in with their surroundings.
green anoleamerican chameleonlizardwakodahatchee wetlands
From Wakodahatchee Wetlands 2011-02-25