White-spectacled Warbler (Phylloscopus intermedius) [XC780767]
by Dave GUO from Mount Lang Biang, L\u1ea1c D\u01b0\u01a1ng, L\u00e2m \u0110\u1ed3ng, Vietnam (call, song)
White-spectacled Warbler (Phylloscopus intermedius) [XC751285]
by Paul Lenrum\u00e9 from Wuyi Shan, Jiangxi, China (call)
Subspecies
Analyses of mitochondrial DNA suggest that this and Grey-cheeked Warbler (Phylloscopus poliogenys) are sister-species; that these two form a clade together with Apricot-breasted Sunbird (Cinnyris buettikoferi) and Flame-breasted Sunbird (Cinnyris solaris) and that some populations of subspecies intermedius are more closely related to subspecies ocularis than to other populations of their own subspecies. Further, subspecies ocularis is indistinguishable from nominate; recognized only provisionally, on basis of geographical isolation. Birds from eastern China (north-western Fujian) described as subspecies cognitus, but considered to represent a colour morph of intermedius.
The following 4 subspecies are recognised:
affinis (Moore, F, 1854) - Himalayas. Considered by some authors to be a distinct species, Tickell's Leaf-Warbler (Phylloscopus affinis).