White-browed Tit-warbler

The white-browed tit-warbler is a small bird of the bushtit family, 8.5–10cm long and 6–8g. The males are vibrantly coloured, with distinctive blue-mauve underparts; both sexes have a light brown crown and white supercilium, and the rump and upper tail-coverts are violet-blue (Wikipedia, general species account).

It is resident in the Tian Shan and central China, and in the Himalayas where it is mainly found in winter, ranging across the Tibetan Plateau and much of north-west China. It prefers dry mountainous shrubland between 2,000 and 5,000m. Birds generally live in pairs in the breeding season but join flocks of 25 or more at the end of it (Wikipedia, general species account).