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The total length of a bird, from bill-tip to tail tip (can be central or lateral). Extremely long-tailed birds (e.g. Red-tailed Tropicbird), sometimes have the extra length added as a second measurement [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.