Family Leaf-warblers (Phylloscopidae)


Biak Leaf-warbler (Phylloscopus misoriensis)


French: Pouillot de Biak German: Biaklaubsänger Spanish: Mosquitero de Biak

Phylloscopus trivirgatus misoriensis


, 1931,



Until recently considered conspecific with P. poliocephalus (and P. maforensis), but assembled evidence of differentiation includes dark olive-green upperparts (duller on head), two indistinct yellowish wingbars, yellow cheeks and throat, olive-green remaining underparts (yellower on centre, greyer on flanks), yellowish bill and legs, unspecified but “very different” behaviour, and much higher-pitched song#R; relevant material not seen in this review and use of scoring system adopted here therefore unfeasible, but cumulative weight of characters persuasive. Monotypic.


Biak I, in Geelvink Bay (NW New Guinea).

Descriptive notes

c. 10 cm. A small to medium-sized, olive-green leaf-warbler appearing short-tailed and rather long-legged. Adult has crown and upperparts dark olive-green (no central... read more


Distinctive song consisting of 4–5 whistled notes at variably high pitch and interspersed with... read more


Primary and secondary forest in lowlands and hills.

Food and feeding

No information. Diet presumably small invertebrates.


No information.



Status and conservation

VULNERABLE. Restricted-range species: confined to the Geelvink Islands EBA. This poorly known species is restricted to the island of Biak, where it is uncommon to rare. On... read more

Recommended citation

del Hoyo, J., Collar, N. & Christie, D.A. (2019). Biak Leaf-warbler (Phylloscopus misoriensis). 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 22 August 2019).