Family Thornbills (Acanthizidae)


Biak Gerygone (Gerygone hypoxantha)


French: Gérygone de Biak German: Biakgerygone Spanish: Gerigón de Biak

Gerygone hypoxantha


, 1878,

Misori (= Biak Island), Geelvink Bay, New Guinea


Taxonomy unsettled; often regarded as a race of G. magnirostris#R#R#R, but seems quite distinct in having clear yellow in plumage, and confined to a long-isolated island with many other distinct endemic taxa. Reported occurrence on Biak of a gerygone (perhaps female) similar to G. palpebrosa needs to be evaluated, but is probably the same as birds allegedly similar to G. chrysogaster but with long bill; both thought likely to refer to present species. Monotypic.


Islands of Biak and Supiori (in N Geelvink Bay), in NW New Guinea.

Descriptive notes

10 cm. Poorly known. Has white lores, whitish broken eyering (or arcs above and below eye); above, grey-brown or brown, or olive with grey crown (latter perhaps referable to... read more


Almost unknown. A short song strophe heard on one occasion in 2006 was reminiscent of G.... read more


Lowland forest and woodland, including forest edge and secondary growth. Many of the known... read more

Food and feeding

Poorly known. Insectivorous, but no details available. Found singly or in presumed pairs, sometimes in feeding flock with Biak Flycatcher... read more


No information.



Status and conservation

ENDANGERED. Restricted-range species: present in Geelvink Islands EBA. BirdLife International has recently opted to downgrade this form to subspecies in its conservation... read more

Recommended citation

Gregory, P. (2019). Biak Gerygone (Gerygone hypoxantha). 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 16 February 2019).