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A bird just leaving the nest, they can be partly or wholly feathered; flightless or partly flighted, but before full flight capability is attained [1].


  1. ^ Simpson & Day (1999). A Field Guide to the Birds of Australia, 6th Edition. Penguin. ISBN 0-691-04995-5. 
Anatomy of an amiotic egg This article is part of Project Glossary, an All Birds project that aims to write comprehensive articles on each term related to animals.