The Asian Brown Flycatcher is a small passerine bird in the flycatcher family. 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.
This species is 15 cm long, including the cocked tail. It is similar in shape to the larger Spotted Flycatcher, but is relatively longer-tailed. The dark bill is relatively large and broad-based.
The adult has grey-brown upperparts, which become greyer as the plumage ages, and whitish underparts with brown-tinged flanks. Young birds have scaly brown upperparts, head and breast.