Anolis carolinensis, the Carolina green anole;
Lake county, Florida (03 March 2012).
A fiesty Carolina green anole, a male, fighting for territory. I watched this and another male battle each other for a bit, each fighting for prime real estate upon which to impress potential females passing by. Note the crested ridge along its back casting that sharp shadow downwards. Cresting is more associated with other non-native anoles in Florida, but Carolina green anoles can crest with the best of them — from time to time. This one had some serious posture-n-pose game.