precocial

/prɪˈkoʊʃəl/
adjective
  1. Describing an animal that is relatively mature and mobile from the moment of birth or hatching.
    • Unlike precocial species, songbirds are altricial and require extensive parental care.
    • Chickens are precocial birds; chicks can walk and peck for food soon after hatching.
    • Precocial mammals like giraffes can stand and run within hours of being born.
Antonyms
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