Mammals: Mammals are endothermic, meaning they can maintain a constant body temperature regardless of the external temperature. They achieve this through physiological mechanisms such as metabolism and insulation.
Birds: Birds are endothermic and maintain a high and constant body temperature, which enables them to fly, regulate metabolism, and adapt to various environments.
Ectothermic vertebrates:
Fish: Most fish species are ectothermic, meaning their body temperature varies depending on the temperature of their surroundings. They rely on external heat sources, such as sunlight or warm water, to regulate their body temperature.
Reptiles: Reptiles, including snakes, lizards, crocodiles, and turtles, are ectothermic. They rely on external heat sources to warm up their bodies and regulate their body temperature.
Amphibians: Amphibians, such as frogs, toads, salamanders, and newts, are generally ectothermic. They rely on external heat sources, such as sunlight or warm water, to maintain their body temperature.