An animal that is active during the day is referred to as diurnal. Diurnal animals have adapted to their environment in such a way that they primarily hunt, forage, and perform other essential functions during daylight hours. This behavior contrasts with nocturnal animals, which are active at night. Many diurnal species include various birds, primates, and some mammals. The diurnal lifestyle often involves seeking shelter during the hottest parts of the day to avoid heat stress and predation. Adaptations in vision and physical capabilities are common among diurnal animals, optimizing them for visibility and activity in sunlight.