Description wikipedia

Güldenstädt's redstart (Phoenicurus erythrogastrus), also known as the white-winged redstart, is a species of bird in the genus Phoenicurus, family Muscicapidae. It is found in the high mountains of the southwestern and central Palearctic in the Caucasus, Karakoram, Pamir, Himalaya, Tian Shan, and Altai, in the countries of Afghanistan, Armenia, Azerbaijan, Bhutan, China, Georgia, India, Iran, Kazakhstan, Mongolia, Nepal, Pakistan, Russia, Tajikistan, Turkmenistan, and Uzbekistan. It is one of the largest redstarts, 18 cm (7.1 in) long and 21–29 g (0.74–1.02 oz) weight. The adult male is black above except for a white crown, a white patch on the wing, and an orange-red tail; below, the throat and upper breast are black, and the rest of the underparts a rich orange-red. The female and immature male are brown above and orange-buff below, with an orange-red tail. It breeds at high altitudes from 3,600–5,200 m (11,810–17,060 ft) in alpine meadows and rock-fields, moving slightly lower to 1,500–4,800 m in winter where it occurs mainly in subalpine Hippophae scrub; some populations, notably the northernmost in the mountains around Lake Baikal, migrate further, reaching northeastern China. It feeds on fruit and a wide variety of invertebrates.