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SIBERIAN CHIFF-CHAFF.
Phylloscopus tristis, Dresser, Birds of Europe, vol. ii, pp. 477-483 (1875).
DESCRIPTION OF THE PLUMAGE.
Adult Male in Spring.—The upper parts are olive brown, slightly more greenish and rather lighter on the rump. The wings are brown, the secondaries being broadly edged with the same colour as the back, only, slightly more greenish. The secondaries, greater coverts, primaries and their coverts are narrowly edged with light brown, whereas the median and lesser coverts are olive brown and the bastard wing dark brown. The tail-feathers are brown edged with the same colour as the back. There is a light superciliary stripe, the lores are brownish buff, and the sides of the head light olive brown. The under parts are whitish, washed with buff on the crop and the sides of the breast. The under tail-coverts are whitish buff and the under side of the tail greyish lavender, the shafts of the feathers being white. The under parts of the wings are light brownish grey, and the axillaries and under wing-coverts bright lemon yellow. The bill is horn brown, the base of the lower mandible being brownish pink. Iris is dark brown, and the feet blackish brown.
The female resembles the male, the young being somewhat duller.
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