Bhutan (B) (NB), China (mainland) (B) (NB), India (B) (NB), Nepal (B) (NB).
Eastern Himalayas in central and eastern Nepal (eastern from Dhaulagiri massif) east to north-eastern India (east to eastern Arunachal Pradesh, also south of R Brahmaputra in Nagaland and western Manipur); also southern Xizang (Chumbi and Tsangpo valleys), in south-western China.
Rarity Status
Currently this species is not classified as a rarity in this country OR information has not been updated.
Population
Estimated population is unknown (2011).
Sikkim Treecreeper (Certhia discolor) [XC100857]
by Frank Lambert from Mandala Pass, Arunachal Pradesh, India (song)
Sikkim Treecreeper (Certhia discolor) [XC626427]
by Lars Lachmann from Sundarview, Eaglenest Wildlife Sanctuary, Arunachal Pradesh, India, India (song)
Subspecies
No subspecies.
Certhia discolor (Sibley and Monroe 1990, 1993) has been split into Sikkim Treecreeper (Certhia discolor) and Manipur Treecreeper (Certhia manipurensis) following Tietze et al. (2006).
Formerly treated as conspecific with Manipur Treecreeper (Certhia manipurensis), but now separated on basis of vocal and genetic evidence. Birds from north-eastern India (Nagaland, western Manipur) sometimes placed with Manipur Treecreeper (Certhia manipurensis), but plumage details indicate clear affiliation with this species.
BirdLife International Species Factsheet