Breeds in central and north-eastern China (eastern Qinghai, southern Gansu, Shanxi and Hebei southern to
Sichuan and Shaanxi). Non-breeding apparently south-eastern Asia.
 
Population
Estimated population is unknown (2010).
Chinese Leaf Warbler (Phylloscopus yunnanensis) [XC805234]
by Oriental Stork from \u4e1c\u7075\u5c71,Beijing,China, China (call)
Chinese Leaf Warbler (Phylloscopus yunnanensis) [XC663017]
by Common Jeff\uff08\u9ebb\u6770\u592b\uff09 from Shahe, Beijing, China (song)
Subspecies
No subspecies.
Soon after being initially described, from specimens taken while on migration, this taxon was synonymized with Pale-rumped Warbler (Phylloscopus chloronotus) (which was at the time treated as a subspecies of Blyth's Leaf-Warbler (Phylloscopus reguloides)). Recent studies in breeding area led to discovery of significant differences from chloronotus in morphology, vocalizations, habitat choice and breeding biology, as well as sympatric breeding distributions and lack of response to playback of each other's songs. The present form was subsequently described as a new species, Phylloscopus sichuanensis, which was later realized to be a junior synonym of existing name. In addition, considerable cytochrome b sequence divergence from the "Lemon-rumped Warbler (Phylloscopus proregulus) complex" found in laboratory analyses.