Encyclopedia > Nocturnal

  Article Content

Nocturnal

A nocturnal animal is one that sleeps during the day and is active at night - the opposite of the normal (diurnal) schedule. 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, eg Bushbabies[?] and bats, can only function at night.



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Shoreham, New York

... size is 2.88 and the average family size is 3.11. In the village the population is spread out with 27.6% under the age of 18, 6.2% from 18 to 24, 17.7% from 25 to 44, ...

 
 
 
This page was created in 27.1 ms