Wairm-bluidit ainimal species can maintain a body temperatur heicher nor thair environment. In pairteecular, homeothermic species maintain a stable body temperatur bi regulatin metabolic processes. The anly homeotherms are the mammals, the birds an ane species o fish, the opah; mony ither species, includin fish, hae some degree o thermoregulation.

Thermographic image: an ectothermic snake is eatin an endothermic moose