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Altricial chicks of an unknown species of passerine.

California Quail - a precocial chick.

A bird that just hatched out of its egg [1].

A hatchling can either be precocial (covered in down, able to feed themselves and be able to move), altricial (naked, blind and helpless) or a mix of both (terns and gulls - are born with down, can move but rarely leave the nest)[2].


  1. ^ Simpson & Day (1999). A Field Guide to the Birds of Australia, 6th Edition. Penguin. ISBN 0-691-04995-5. 
  2. ^ Frances, Peter; et al. (2007). Bird: The Definitive Visual Guide. Dorling Kindersley Inc. ISBN 1564582957. 
Anatomy of an amiotic egg.svg This article is part of Project Glossary, a All Birds project that aims to write comprehensive articles on each term related to animals.