Asian Openbill Storks

The Asian Openbill or Asian Openbill Stork, Anastomus oscitans, is a large wading bird in the stork family Ciconiidae.

Distribution / Range

It is a resident breeder in tropical southern Asia from India and Sri Lanka east to Southeast Asia.


The Asian Openbill Stork is a broad-winged soaring bird, which relies on moving between thermals of hot air for sustained flight.

Like all storks, it flies with its neck outstretched.

It is relatively small for a stork at 68cm length.

Breeding adults are all white except for the black wing flight feathers, red legs and dull yellow-grey bill. The mandibles do not meet except at the tip, and this gives rise to the species’ name.

Non-breeding adults have the white of the plumage replaced by off-white.

Young birds have brown tinge to the plumage.

Stork General Info … Photos of the Different Members of the Stork Family for Identification
Asian Openbill

Breeding / Nesting

They breed near inland wetlands and build stick nest in trees, typically laying 2-6 eggs.

Asian Openbill pair on nest Juvenile Asian Openbill

Diet / Feeding

The Asian Openbill Stork, like most of its relatives, walks slowly and steadily on the ground, feeding on mollusks, frogs and large insects.

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Gordon Ramel

Gordon is an ecologist with two degrees from Exeter University. He's also a teacher, a poet and the owner of 1,152 books. Oh - and he wrote this website.

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