The Parental Care Model hypothesizes that endothermy is arisen as a consequence of selection for parental care because endothermy enables a parent to control incubation temperature.

• 双亲行为模型是指在鸟兽类中，内温性是对双亲行为选择的结果，因为内温性为双亲控制抚育温度提供了保证。