The small feathers covering the bases of the flight feathers and tail, above and below [1].
References[]
^Clark, William S.; Brian K. Wheeler (2011). Hawks of North America, 2nd Edition. Boston, MA: Houghton Mifflin Company. p. 12. ISBN0395670675.Cite uses deprecated parameter |coauthors= (help); |access-date= requires |url= (help)
This article is part of Project Glossary, an All Birds project that aims to write comprehensive articles on each term related to animals.