Red-breasted Flycatcher (Ficedula parva) and Taiga Flycatcher (Ficedula albicilla) are two very similar flycatchers with white sides to their tails. Once considered the same species, both species together breed across the Eurasian taiga from Western Europe to East Asia.
Red-breasted Flycatcher breeds west of Central Asia and winters largely in the Indian Subcontinent except in the northeastern parts.
Taiga Flycatcher breeds east of Central Asia and winters throughout the Indian Subcontinent but are most abundant in Northeast India, Bangladesh and Southeast Asia.