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When a differently coloured line of feathers extends behind the eyes. A smaller spot is called a postocular spot [1]

References[]

  1. ^ Garrigues, Richard and Dean, Robert (2007). Birds of Costa Rica. Zona Tropical Publication. ISBN 9780801445873. 
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.


Little Pied Cormorant This article is part of Project Anatomy, a All Birds project that aims to write comprehensive articles on each anatomical term related to birds.
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