Family Reed-warblers (Acrocephalidae)

Data Deficient

Large-billed Reed-warbler (Acrocephalus orinus)


French: Rousserolle à grand bec German: Großschnabel-Rohrsänger Spanish: Carricero picudo

Acrocephalus orinus


, 1905,

Himachal Pradesh, India


Until recently known only from type specimen, which had been variously suggested to represent an isolated population of A. stentoreus, a hybrid with A. dumetorum, or an aberrant A. dumetorum. However, re-examination of its morphology and mitochondrial DNA supports treatment as a separate species#R. Subsequently, three individuals were captured in Thailand in 2006–2008#R and at least 27 specimens have been discovered in museums, erroneously labelled as A. dumetorum#R#R. Monotypic.


Breeding range apparently extends from SE Kazakhstan to NE Afghanistan, through Tajikistan and parts of E Uzbekistan and Kyrgyzstan, in mountainous areas at 900–3000 m#R#R#R. Wintering grounds not established but recorded in N India, Myanmar and Thailand#R.

Descriptive notes

13–14 cm; 10·9 g (n = 1). Medium-sized reed-warbler with noticeably large and strong bill, long narrow tail with pointed feathers, rounded wingtip. Has... read more


Song similar to Blyth’s Reed Warbler.


Breeds in thickets of sea-buckthorn (Hippophae rhamnoides) and willows (Salix spp... read more

Food and feeding

No information.


The sole existing study was conducted in S Tajikistan. Monogamous, although attempted extra-pair copulations observed. Nest constructed by... read more


Summer visitor to Central Asia, noted in Tajikistan from late May to Sept. Recorded in N Pakistan... read more

Status and conservation

Data Deficient. Until very recently known only from the type specimen, collected in the Sutlej Valley, near Rampur, Himachal Pradesh, N India, in Nov 1867. In Mar 2006, one... read more

Recommended citation

Dyrcz, A., de Juana, E. & Kirwan, G.M. (2019). Large-billed Reed-warbler (Acrocephalus orinus). 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 23 February 2019).