168:, the primary coverts. Within each group, the feathers form a number of rows. The feathers of the outermost, largest, row are termed greater (primary-/secondary-) coverts; those in the next row are the median (primary-/secondary-) coverts, and any remaining rows are termed lesser (primary-/secondary-) coverts. The underwing has corresponding sets of coverts (the names upperwing coverts and underwing coverts are used to distinguish the corresponding sets). In addition, the front edge of the wing is covered with a group of feathers called the marginal coverts. Within each group of wing coverts, the rows of feathers overlap each other like
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The uppertail and undertail coverts cover the base of the tail feathers above and below. Sometimes these coverts are more specialised. The "tail" of a
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The ear coverts are small feathers behind the bird's eye which cover the ear opening (the ear of a bird has no external features)
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The upperwing coverts fall into two groups: those on the inner wing, which overlay the
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164:, known as the secondary coverts, and those on the outer wing, which overlay the
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Mullarney, Killian; Svensson, Lars; Zetterstrom, Dan; Grant, Peter (1999).
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Topside of a chicken wing showing all major feather groups
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198:. London: HarperCollins.
162:secondary flight feathers
166:primary flight feathers
64:more precise citations.
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