In biology, a warm-blooded animal species is one whose members maintain thermal homeostasis; that is, they keep their body temperature at a roughly constant level, regardless of the ambient temperature. This involves the ability to cool down or produce more body heat. Warm-blooded animals mainly control their body temperature by regulating their metabolic rates (for example increasing their metabolic rate as the surrounding temperature begins to decrease). Both the terms "warm-blooded" and "col… (More on Warm-blooded)