...This species in summeris entirely black except the wing coverts whichare white... 
Chester A. Reed 「The Bird Book」
...This strikingly marked Duck is twenty inchesin length, has a green head and speculum, bluewing coverts and chestnut belly...
Chester A. Reed 「The Bird Book」
...This bird, with its broad, flat bill, bare head, and rosy plumage with carmineepaulets and tail coverts, seem more like the fanciful creation of some artistthan a real bird of flesh and blood...
Chester A. Reed 「The Bird Book」
...Full plumagedadult birds have very brilliantcarmine shoulders and tail coverts,a saffron colored tail, and alengthened tuft of bright rosyfeathers on the foreneck...
Chester A. Reed 「The Bird Book」
...This species is very similar to the CanadaGrouse, the most apparent difference being theabsence of the brownish gray tip to the tail, andthe upper coverts are broadly tipped with white...
Chester A. Reed 「The Bird Book」
...Similar to the Hairy but with fewer or no white spotson the wing coverts, and grayish on the underparts...
Chester A. Reed 「The Bird Book」
...This beautiful Warbler is yellowbelow and on the rump, streaked onthe breast and sides with black;the ear coverts and sometimes the throat arechestnut...
Chester A. Reed 「The Bird Book」
...Toodark tail coverts approaching a greenish blacksometimes occur and are undesirable...
Harry M. Lamon 「Ducks and Geese」
...Sooty slate; linings of wingswhite; scapulars, upper tail coverts, and tail featherstipped with white...
Frank M. Chapman 「Color Key to North American Birds」
...Above grayish brown or blackish; tips of longerupper tail coverts white; below white; middle of bellyand under tail coverts ashy gray...
Frank M. Chapman 「Color Key to North American Birds」
...Above dusky black; below white; sidesof breast grayish; under tail coverts dusky brown; bill black...
Frank M. Chapman 「Color Key to North American Birds」
...Tail forked; abovesooty brownish black; below browner; lesser wing covertsgrayish brown; longer upper tail coverts not tippedwith black...
Frank M. Chapman 「Color Key to North American Birds」
...Webs of feet with yellowpatch: tail not forked; longer upper tail coverts nottipped with black...
Frank M. Chapman 「Color Key to North American Birds」
...Ifat night, however, a strange foot entered the coverts, Dash, by asignificant whine, informed his master that an enemy was abroad, andthus many poachers have been detected...
Edward Jesse 「Anecdotes of Dogs」
...They are lively, happy little workers, and on grouse in dense coverts, no dog possesses a better nose for the purpose...
Oliver Hartley 「Hunting Dogs」
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