The Asian Brown Flycatcher (Muscicapa dauurica) is a small passerine bird in the flycatcher family Muscicapidae. It includes the Brown-streaked Flycatcher, which is sometimes considered a distinct species Muscicapa williamsoni.
This is an insectivorous species which breeds in Japan, eastern Siberia and the Himalayas. It is migratory and winters in tropical southern Asia from southern India and Sri Lanka east to Indonesia.[wiki]