Birds are warm blooded

Yes, birds are warm blooded

The terms "warm-blooded" and "cold-blooded" are horribly misleading since we are not trying to refer to the temperature of the animal's blood.

Birds are, however, endothermic, meaning that they use their own metabolism to maintain a (relatively) constant body temperature just as mammals do. Many other animals, fish, amphibians, reptiles, etc, are ectothermic, meaning that they rely on the ambient/environmental temperature and thus cannot maintain as stable of an internal temperature.