Green Anole and Brown Anole (IMAGE) University of Texas at Austin Caption Native green anoles (left) have evolved better gripping feet in response to an invasion of brown anoles (right) on islands in Florida. Credit Todd Campbell and Adam Algar Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.