Nazarenko A.A., Steinheimer F.D., Surmach S.G.
British Ornithologists' Club occasional publications Number 5 Year: 2010 Pages: 117-124Sixty specimens of the Chinese Nuthatch Sitta villosa from seven different collections revealed a well-defined divergence in body coloration between isolated populations of N China (villosa sensu stricto) and northern Korea to SW Ussuriland (the so-called ‘corea’ form). The ‘corea’ population is paler at all seasons. On that basis, even though the difference in wing-length between populations reported by other authors was not found to be significant, we recommend recognition of Sitta villosa corea Ogilvie-Grant 1906 as a valid subspecies.
