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Nidicolous
Nidicolous (from Latin: nidus "nest" and colous "inhabiting") — a term that describes animals that appear undeveloped and stay at their birthplace for a long time, due to their dependence on the parents for feeding, protection and learning survival skills. They are the opposite of nidifugous species who leave their parents more quickly and survive independently. Another pair of terms to describe this developmental phenomenon, altricial and precocial, is also used by scientists.〔Ehrlich, P. R., Dobkin, D. S., & Wheye, D. (1988). (The birder's handbook: A field guide to the natural history of North American birds : including all species that regularly breed north of Mexico ). New York: Simon & Schuster, p. 582〕
Examples of nidicolous species are most mammals, marsupials and many species of birds. The great majority of nidicolous animals are altricial; an animal born helpless, blind and without feathers or hair, simply unable to fend for itself. During the life span the brain of nidicolous animals expands 8-10 times of its initial size, in nidifugous animals, from 1.5 to 2.5 times.〔(Grene, M. (1974). The understanding of nature: Essays in the philosophy of biology. Dordrecht: Reidel Pub. )〕〔Sutter, E. (1951). Growth and differentiation of the brain in nidifugous and nidicolous birds. Uppsala: Almqvist & Wiksell. 〕 Humans are precocial-born, nonetheless our brain, which at birth constitutes 25% of its adult size, continue to expand significantly during lifetime.〔Berger, K. S. (2005). (The developing person through the life span ). New York: Worth Publishers. 〕
However, the concepts of altricial and nidicolous are not identical. All altricial animals are nidicolous by necessity, but an animal may be nidicolous, such as staying at the nest, even if it is precocial and fully capable of leaving if needed.
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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