 The majority can change their color depending on things like emotions (for example, aggression or stress), activity level, levels of light and as a social signal (for example, displaying dominance), but evidence showing that they do it in response to the color of the background (camouflage) is lacking.Whether they do it in response to temperature (thermoregulation) is less clear, with studies supporting it and contradicting it.The extent and variations of this color changing ability differ widely throughout the individual species.