precocial

[pri-koh-shuhl]
adjective Biology.
(of an animal species) active and able to move freely from birth or hatching and requiring little parental care (opposed to altricial ).

Origin:
1870–75; precoci(ous) + -al1

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World English Dictionary
precocial (prɪˈkəʊʃəl)
 
adj
1.  (of the young of some species of birds after hatching) covered with down, having open eyes, and capable of leaving the nest within a few days of hatching
 
n
2.  a precocial bird
 
[C19: see precocious]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
precocial   (prĭ-kō'shəl)  Pronunciation Key 
Born or hatched in a condition requiring relatively little parental care, as by having hair or feathers, open eyes, and the ability to move about. Water birds, reptiles, and herd animals usually have precocial young. Compare altricial.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Within hours of hatching, the precocial chicks leave the nest but stay close to
  be brooded by the parents.
Nestlings are precocial but remain with adults until the subsequent spring.
Hares are also precocial, meaning they are born with hair and with their eyes
  open.
The chicks are precocial, which means they leave the nest with their parents,
  shortly after hatching.
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