Ficedula narcissina elisae
The green-backed flycatcher (Ficedula elisae) is a bird in the family Muscicapidae, which contains the Old World flycatchers. It was long considered to a subspecies of the narcissus flycatcher, but morphological and acoustical differences between the two indicate they are instead separate species. It breeds in northeastern China and winters in southeast Asia.
"F. beijingnica", proposed as a separate species called Beijing flycatcher or Peking flycatcher, is now considered by experts to be the first-summer male of this species and thus no longer a valid taxon.
- BirdLife International (2016). "Ficedula elisae". The IUCN Red List of Threatened Species. IUCN. 2016: e.T103769400A104316829. doi:10.2305/IUCN.UK.2016-3.RLTS.T103769400A104316829.en. Retrieved 14 January 2018.
- Zhang, Yan-Yun; Wang, Ning; Zhang, Jie; Zheng, Guang-Mei (August 2006). "Acoustic difference of narcissus flycatcher complex". Acta Zoologica Sinica. 52 (4): 648–654.