Large-billed Reed Warbler (Acrocephalus orinus)

The Large-billed Reed Warbler is a small songbird found in wetlands and marshes across south-east Asia. With its distinctively long bill and olive-brown plumage, this bird can be difficult to spot among the reeds and grasses where it often hides.

Despite its elusive nature, the Large-billed Reed Warbler has been studied by scientists for its unique breeding behavior. Unlike most birds that lay their eggs in a nest and incubate them themselves, this species engages in what is called brood parasitism. This means that they lay their eggs in the nests of other birds, such as the Oriental Reed Warbler, leaving the foster parents to incubate and raise their young.

This perhaps unusual strategy is thought to be an adaptation to their wetland environment, where finding suitable nesting sites can be a challenge. By using the nests of other species, the Large-billed Reed Warbler can save energy and resources that would otherwise be used in building their own nest.

The Large-billed Reed Warbler feeds on insects and other small invertebrates found in the wetland habitats it occupies. It is often seen darting in and out of dense vegetation, using its long bill to probe for prey.

This species faces threats from habitat loss and degradation, as wetlands across its range are drained and converted for agriculture or urban development. Conservation efforts to protect and restore wetland habitats are crucial for the survival of the Large-billed Reed Warbler and other species that rely on these unique ecosystems.

Other names

Acrocephalus orinus



Large-billed Reed Warbler

boscarla becuda



krupnokljuni trstenjak

rákosník severoindický

Stornæbbet Papyrussanger

Humes Karekiet


Rousserolle à grand bec


Cannareccione beccogrosso


didžiasnapė nendrinukė


trzciniczek wielkodzioby


Большеклювая камышевка

Krupnokljuni trstenjak

trsteniarik veľkozobý

Carricero picudo

långnäbbad sångare

Uzun Gagalı Kamışçın

очеретянка великодзьоба

himaalaja roolind

nagycsőrű nádirigó