Asian Openbill

This species is defined as a Review Species . Please submit your records of this species via our record submission page .

Scientific Name: Anastomus oscitans

Malay Name: Upih-Siput Asia

Chinese Name: 钳嘴鹳

Range: Found from the Indian subcontinent to mainland Southeast Asia

Taxonomy: Monotypic.

Size: 68-81 cm

Identification: Adult has diagnostic dull yellowish-grey bill with open spaces between mandibles and long pinkish-grey legs. Body is mostly greyish-white with contrasting glossy black flight feathers and tail. Juvenile likes adult but body more brownish grey and bill has no spaces between mandibles.

Habitat: Freshwater marshes, flooded fields and padi fields.

Behaviour/Ecology: A small flock of 6 adults were observed feeding on Golden Apple Snails (an introduced species) at a flooded field along West Camp Road.

Local Status: Vagrant

Conservation Status: Least Concern (BirdLife International 2016)

Past records in our database:

Showing only accepted records. Records currently under review are also not displayed. For a full list, click here.

Migrant bar chart (see more bar charts):


BirdLife International. (2016). Anastomus oscitans. The IUCN Red List of Threatened Species 2016. Accessed on 1 January 2023

Robson, C. (2014). Field guide to the birds of South-East Asia (Second Edition). Bloomsbury Publishing, London.