The term warm-blooded is a colloquial term to describe animal species which have a relatively higher blood temperature, and maintain thermal homeostasis primarily through internal metabolic processes. These are characteristics of mammals and birds.
Both the terms "warm-blooded" and "cold-blooded" have fallen out of favour with scientists because of the vagueness of the terms and an increased understanding of the field. Body temperature types are not discrete categories. Each term may be replaced with one or more variants (see the next section for examples). Body temperature maintenance (thermoregulation) incorporates a wide range of different techniques that result in a body temperature continuum.
Read more about Warm-blooded: Characteristics of Warm-bloodedness, Reasons For Term Falling Into Disuse, Heat Generation