(955) Oriolus chinensis tenuirostris.
The Burmese Black-naped Oriole.
Oriolus tenuirostris Blyth, J. A. S. B., xv, p. 48 (1846) (Central India); Blanf. & Oates, i, p. 503.
Vernacular names. Pilak (Hind.) ; Sa-nwin-wa (Burmese).
Description. Similar to 0. c. indicus but with the nape band narrower; the back in the male duller and more green and with the bill decidedly more slender.
Colours of soft parts and Measurements much the same as in the preceding bird. Wing 142 to 155 mm.; culmen 30 to 33 mm.
Distribution. Breeding in the Lower Himalayas from East Nepal to Assam ; Manipur; Tippera and Chittagong in Eastern Bengal; all Burma South to Tenasserim ; Kachin Hills, Shan States, Yunnan and Siam. In Winter in the Plains of Cachar, Sylhet, Dacca and Mymensingh.
Nidification. I found this bird breeding commonly from the foot-hills up to 4,000 feet in the Hills of Assam and, occasionally, up to 6,000 feet. Hopwood found it breeding at Monywa in Upper Burma between 3,000 and 4,000 feet. The eggs are like those of Oriolus o. oriolus but nearly always have a warm pink ground whilst the markings are red or purple-brown rather than black. In two clutches taken by myself the ground-colour is a yellowish pink and the markings are all light chestnut. Thirty eggs average 27.9 x 20.7 mm.: maxima 29.6 X 21.7 mm.; minima 26.1 X 19.3 and 27.3x 19.0 mm.
The nests are just like those of all other Orioles but this species may sometimes be found breeding in open deciduous forests and, in Cachar, I found most nests attached to creepers on oaks growing in park-like country.
They breed during May and June.
Habits. Those of the genus but they are not so exclusively birds of the open country. In the Khasia Hills I found them on the outskirts of oak and rhododendron forests where it was interspersed with grass glades, whilst in Cachar it occurs in open oak forests.