The Yellow-rumped Flycatcher, Korean Flycatcher or Tricolor Flycatcher (Ficedula zanthopygia) is a species of flycatcher found in Asia. A distinctive species with almost no look-alike other than the Narcissus Flycatcher. It breeds in eastern Asia including parts of Mongolia, Transbaikal, southern China, Korea and western Japan. They winter in parts of the Malay Peninsula and South Asia.
Read more about Yellow-rumped Flycatcher: Identification, Ecology