Tail coverts

Also found in: Wikipedia.
(Zool.) the feathers which cover the bases of the tail quills. They are sometimes much longer than the quills, and form elegant plumes. Those above the quills are called the upper tail coverts, and those below, the under tail coverts.

See also: Tail

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Adult females are greyish-brown on the back, with scattered reddish feathers dispersed on the rump and upper tail coverts. immature males and females have similar plumage to adult females and there is no apparent plumage difference between adult and young females (Sick 1997).
The age of females that had not been banded as nestlings was estimated as follows: 1 yr old--back and most upper tail coverts brown, 2 yr old--tail coverts had a few brown and many grey feathers, and 2+ yr old--tail coverts were grey.