Animals live at night or nocturnality is an animal that sleep in the day, and active at night. Such as the opposite of human behavior (commencing their diurnal computation). Nocturnality generally have the ability to hearing and smell and seeing that sharply lower. In the zoo, nocturnal animals placed in special cage which is insulated from light to divert their sleep cycle, so they still active during the visit.
Nocturnal animal usually develops hearing ability and smell, and have adaptations in the eye to carry out the activities in a situation in which has little light. Some animals such as cats have eyes that can adapt to a little light and a light. Other animals such as galago and some types of bats can only be exercising at night. Many animals such as nocturnal tarsier and the owl have eyes that relative large compared to their own sizes to give their ability as a return of high light in the night
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