A group of living organisms, which maintains their constant body temperature, without getting much affected by the external environmental temperature are called Homoiothermous organisms.
Homoiothermous creatures can keep a steady internal temperature, but poikilothermic species' internal temperatures vary with their surroundings.
Homoiothermous animals are those with warm blood.
They can keep their body temperature steady.
Mammals, birds, bats, and rabbits are among examples.