The barred anole (anolis stratulis), also known as the St. Thomas anole or spotted anole, is found in Puerto Rico, the U.S. Virgin Islands and the British Virgin Islands. The male does not have a dorsal crest or tail fin and the color ranges from brownish gray to gray. It has hour glass shaped spots from the nape to the tail and a black, crescent shape behind the eye. Its flanks are marked with small dark spots. In the Tabonuco zone of El Yunque NF it is estimated that there may be 43,000 barred anole per acre, making it the most prevalent species in that habitat. I saw the one pictured next to the Yokahu Tower in El Yunque NF.