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A roundish area of feathers around the face, such as on owls and harriers[1] .

Rereferences[]

  1. ^ Stokes, Donald W. and Stokes, Lilian Q. (2010). Stokes Field Guide to the Birds of North America. Little, Brown and Company. ISBN 9770316010504 Check |isbn= value: invalid prefix (help). 
This article is part of Project Glossary, an All Birds project that aims to write comprehensive articles on each term related to animals.


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