Family Leaf-warblers (Phylloscopidae)

Least Concern

Claudia's Leaf-warbler (Phylloscopus claudiae)


French: Pouillot de Claudia German: Claudialaubsänger Spanish: Mosquitero de Claudia

Acanthopneuste trochiloides claudiae

La Touche

, 1922,

Mengzi, south-eastern Yunnan


Until recently considered conspecific with P. reguloides and P. goodsoni, but separated on basis of deep molecular divergence#R and vocal differences#R. This arrangement provisionally accepted here pending further evidence on voice, distribution and habitat, although the taxon currently fails to meet required criteria under the scoring system used herein, differing in its whitish vs dull yellowish-white supercilium and underparts (1); marginally less white in tail (ns); and relatively distinctive song (a simple repeated note; score 3), although a second song type is virtually inseparable from songs of others (implications unknown). Monotypic.

What do (1) and (2) mean? Learn more about the scoring system.

C & NE China (C Sichuan E to Hubei, N to S Gansu, S Shanxi and S Shaanxi; also Hebei)#R#R; non-breeding possibly NE India (Khasi Hills and Manipur, at least), C & S Myanmar, S China (S Yunnan), NW & NE Thailand and N Vietnam (W Tonkin).

Descriptive notes

c. 10 cm; 7·5–10 g. A medium-sized, well-marked leaf-warbler. Adult has long pale yellow supercilium becoming whiter at rear, thin blackish-olive loral line and broader... read more


Song a protracted series of almost trill-like notes, “chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-chi-... read more


Breeds mainly in deciduous and mixed forests, locally in conifer and broadleaf evergreen forest; in... read more

Food and feeding

No detailed information. Diet presumably small arthropods and larvae, much as that of P. reguloides. Forages in canopy, at times... read more


Unlikely to differ significantly from P. reguloides and other close relatives.


Migratory. Winters mainly in SE Asia from S China (S Yunnan) S to C & S Myanmar, NW & NE... read more

Status and conservation

Not globally threatened (Least Concern). Fairly common within its rather large range. No accurate estimates of this species’ population size are available, but there are no... read more

Recommended citation

del Hoyo, J., Collar, N. & Christie, D.A. (2019). Claudia's Leaf-warbler (Phylloscopus claudiae). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 18 August 2019).