(779) Dicrurus leucogenys leucogenys.
The White-cheeked Drongo,
Buchanga leucogenys Walden, A. M. N. H,, (4) v, p. 219 (1870) (China) Dicrurus leucogenys. Blanf. & Oates, i, p. 317.
Vernacular names. Not recorded.
Description. Forehead black, grading into blue-grey on crown ; lores, ear-coverts and round the eye white ; shafts of tail-feathers black and outer webs of outermost pair of tail-feathers blackish ; terminal portions of wing-quills blackish ; remainder of upper plumage pale bluish grey with a distinct sheen; below the same with no sheen and paler on the abdomen.
Colours of soft parts. Iris red to deep crimson ; bill, legs and feet black.
Measurements. Wing 132 to 146 mm.; tail 125 to 138 mm.; tarsus about 17 to 18 mm.; bill from anterior point of nostril to tip about 16 to 17 mm.
Birds from Hainan and Cochin China are rather darker and smaller, wing 129 to 135 mm., whilst birds from Sumatra are decidedly darker below and much smaller with a short tail; wing 120 to 124 mm.; tail 98 to 120 mm.
Distribution. Peninsular Burma to Singapore, the Indo-Chinese countries (excepting perhaps Cochin China and Hainan), Siam, Yunnan, China and Japan.
Nidification. La Touche found this bird breeding in large numbers during May and June at Foochow, building a typical Drongo's nest either on a Pine or other tree, generally at a good height from the ground. Eighty-two eggs average 24.4 x 18.8 mm : maxima 26.4 x 19.3 mm.; minima 21.8 x l7.3. They vary in the same manner as do those of the more common Drongos in India.
Habits. Those of the genus.