Regulators : The organism able to maintain homeostasis by physiological and behavioural means is called regulators. All birds and mammals and few lower vertebrates and invertebrates' species maintain homeostasis by thermoregulation and osmoregulation.
For e.g : - Birds & Mammals.
Conformers: Majority (99%) of animals and nearly all plants cannot maintain a constant internal environment. Their body temperature is not constant. They are simply conformers.
e.g : Fishes, Frogs etc.
