Family Grasshopper-warblers and Grassbirds (Locustellidae)


New Britain Thicketbird (Megalurulus grosvenori)


French: Mégalure de Gilliard German: Bismarck-Buschsänger Spanish: Yerbera de Nueva Bretaña

Cichlornis grosvenori


, 1960,

Wild Dog Range, Whiteman Mountains, central New Britain; altitude 5200+ feet [c.1585 m]


Formerly placed in Cichlornis. Until recently treated as conspecific with M. llaneae, M. turipavae and M. whitneyi, but differs from first two in characters given under those species and from M. whitneyi by its broader, longer, blacker mask, encompassing eye and extending to rear ear-coverts (2); longer, thicker tarsus (allow 2); shallower and less curved culmen (1); less graduated tail (1); and dark brown vs black legs (1). Monotypic.

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

New Britain (Whiteman Mts), in Bismarck Archipelago.

Descriptive notes

17–19 cm. A relatively long-tailed, medium-sized warbler, with dark rusty-brown upperparts and crown (darkest on lower back and rump), blackish wings, and graduated tail with... read more


Almost unknown. Occasional ‘single notes’ reported.


Inhabits undergrowth with bamboo in montane forest on karst limestone, at or above 1580 m.

Food and feeding

Stomachs of the only two specimens contained “tiny black insects” and “small hard-bodied insects”. Feeds on ground, or in vegetation low... read more


Nothing known.


Resident, so far as is known.

Status and conservation

VULNERABLE. Restricted-range species: present in New Britain and New Ireland EBA. Known only from type locality (and two specimens) and has not been found since its discovery... read more

Recommended citation

del Hoyo, J., Collar, N. & Kirwan, G.M. (2019). New Britain Thicketbird (Megalurulus grosvenori). 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 15 February 2019).