707. Cochoa viridis.
The Green Thrush.
Cochoa viridis, Hodgs. J. A. S. B. v, p. 359 (1830); Blyth, Cat. p. 194 ; Jerd. B. I. ii, p. 243 ; Hume, N. & E. p. 389; id. Cat. no. 608; Sharpe, Cat. B. M. iv, p. 2; Hume, S. F. xi, p. 239; Oates in Hume's N. & E. 2nd ed. ii, p. 111.
The Green Thrush-Tit, Jerd.
Coloration. Male. Forehead, crown, nape, and hind neck brilliant cobalt-blue; lores and a short supercilium black ; ear-coverts indigo-blue ; cheeks greenish blue; the whole upper plumage and scapulars varying in different individuals, according to age, from deep green to golden-yellow, the feathers of the back and scapulars fringed with black; median pair of tail-feathers purplish blue tipped black, the next four pairs black on the inner web, blue on the outer and tipped black, the outermost pair entirely black ; lesser wing-coverts green narrowly tipped black, the median with broader tips ; winglet black; primary-coverts with the inner webs black, the basal two thirds of the outer blue and the terminal third black ; greater coverts with the inner webs greenish brown tipped black, the outer with the basal two thirds green, broadly edged with blue, the remainder black; first two primaries black; the remaining quills black, with a long patch of blue at the base of each outer web; the whole lower plumage green, suffused with blue on the abdomen and with oil-yellow on the breast and flanks.
Female. Differs from the male in the coloration of the wing only. The secondaries and tertiaries have the basal patch on the outer webs yellowish brown instead of blue, and this colour occupies the major portion of the outer webs of the greater coverts, the blue edgings being very narrow.
The young bird (perhaps the female nestling only, the male resembling the adult male probably in the coloration of the wing) has the crown, forehead, and nape bluish brown, each feather tipped black and with a subterminal band of white ; the upper plumage greenish brown, with large buff spots : supercilium black; ear-coverts white, with blackish tips; the whole lower plumage buff, irregularly and narrowly cross-barred with black; the wings and tail as in the adult female.
A nearly adult bird killed in Sikhim in March, and one in Manipur in May, have the cheeks, ear-coverts, and a demi-collar at the side of the neck pure white; the chin and throat also are whitish, and the lower plumage bright chestnut-brown. According to Hume this is the second stage of plumage. There does not appear to be anything analogous to it, however, in 0. purpurea.
Iris brown, brownish orange, dull brownish maroon ; legs brown, with a varying amount of pinkish tinge; bill black; gape and orbital skin pink (Hume Coll.).
Length about 11; tail 4.8; wing 5.6; tarsus 1.1; hill from gape 1.2.
Distribution. The Himalayas from Kumaun to Sikhim up to 11,000 feet; Cachar; Manipur. This species extends into China. Hume gives the Bhagirati valley as the western limit of this. Thrush, but there is no specimen from this locality now in his collection, and I have seen none from further west than Jeoli below Naini Tal.
Habits, &c. The nest of this species is described as being a cup composed of fine twigs and roots coated externally with moss, and built on branches of large trees ten to twenty feet from the ground. An egg was greyish green marked with red, and measured 1.03 by .75.