Hawk maintains a consistent internal temperature in both the heat of the day in the cool of the night. this is called

Answer

hawk maintains a consistent internal temperature in both the heat of the day and the cool of night this is called as endothermy.

Endothermy also known as warm-bloodedness is defined as the ability of an animal, bird or organism to produce heat and conserve it to maintain a consistent internal temperature.  

a 2,000 calorie based diet.