The Morne Constant anole (Anolis ferreus) is a species of anole lizard that is endemic to the island of Marie-Galante, which is part of Guadeloupe in the Caribbean Lesser Antilles. Males can reach a length of 119 mm snout-to-vent, while females are significantly smaller, at 65 mm SVL. It has a yellow-green dorsal surface, and a blue-gray head with yellow around the eye. Males have prominent tail crests. It is primarily active during the middle part of the day, retreating to high perches in the late afternoon. It was formerly considered a subspecies of A. marmoratus.