
Photo: (c) Zinogre, some rights reserved (CC BY-SA) · CC BY-SA 4.0 (May be cropped or resized)
Ficedula elisae
Range
Breeds in north-eastern China; winters in southeast Asia
The green-backed flycatcher is an Old World flycatcher that breeds in north-eastern China and winters in southeast Asia. It was long considered a subspecies of the narcissus flycatcher, but morphological and acoustic differences between the two indicate they are separate species (Wikipedia, general species account).