What is a regulator or conformer?

A regulator, often referred to as an endotherm, is an organism that maintains a constant internal body temperature regardless of external environmental conditions. This ability allows them to thrive in a variety of habitats. In contrast, a conformer, or ectotherm, relies on external environmental temperatures to regulate their body heat, leading to variations in their internal physiological processes based on the surrounding environment. This difference significantly influences their behavior, habitat choice, and adaptability.