Please read Wikipedia founder Jimmy Wales's personal appeal.

Nocturnal animal

From Wikipedia, the free encyclopedia.

(Redirected from Nocturnal)

For information on the rapper, see Knoc-Turn'al.

A nocturnal animal is one that sleeps during the day and is active at night - the opposite of the typical human schedule (diurnal). The intermediate crepuscular schedule (twilight activity) is also common.

Nocturnal animals generally have highly developed senses of hearing and smell, and specially adapted eyesight. In zoos, nocturnal animals are usually kept in special night-illumination enclosures to reverse their normal sleep-wake cycle and to keep them active during the hours when visitors will be attempting to see them.

Some animals, such as cats, have eyes that can adapt to both night and day levels of illumination. Others, e.g. bushbabies and bats, can only function at night.

A person who exhibits nocturnal habits is referred to as a night owl.

[edit]