Asian Openbills

on 17th October 2021

In the past few months, since January 2020, I have been seeing Asian Openbills (Anastomus oscitans) in the city. Initially at the fringe, and now in the heart of the city. At first it was 3-5 birds, now flocks of 20-40 (below). I see them fly over my urban home in the morning or sitting on a tree near a pond/lake.

Numbers have not diminished with the migration season coming to an end but instead have enhanced. There may be 50-100 birds (or more) scattered over the city and additional numbers at the wetland (ex-mining pools) city fringes.

Above shows the back view of 3 different birds to show the tail that is often hidden by the wings at rest. I often see a sheen of glossy green over the tail and wing plumage, particularly yesterday. Most sources describe adult plumage as greyish-white with black flight feathers and tail. Hancock et al (2010) notes that before the onset of breeding the black feathers take on an iridescent purplish green. Note the feathers of these bird, especially the two on the right that have caught the sun are not totally black.


James Hancock, James A. Kushlan, M. Philip Kahl, Alan Harris, David Quinn. Storks, Ibises and Spoonbills of the World. Helm Identification Guides. 2010.

Amar-Singh HSS (Dato’ Dr)

Ipoh, Perak, Malaysia                                                                                                                                                                    Location: Ipoh, Perak, Malaysia                                                                                                                                                        Habitat: Urban environment

Date: 21st May 2020

Equipment: Equipment: Nikon D500 SLR with Nikon AF-S 105mm f/2.8G VR IF-ED


If you like this post please tap on the Like button at the left bottom of page. Any views and opinions expressed in this article are solely those of the authors/contributors, and are not endorsed by the Lee Kong Chian Natural History Museum (LKCNHM, NUS) or its affiliated institutions. Readers are encouraged to use their discretion before making any decisions or judgements based on the information presented.

YC Wee

Dr Wee played a significant role as a green advocate in Singapore through his extensive involvement in various organizations and committees: as Secretary and Chairman for the Malayan Nature Society (Singapore Branch), and with the Nature Society (Singapore) as founding President (1978-1995). He has also served in the Nature Reserve Board (1987-1989), Nature Reserves Committee (1990-1996), National Council on the Environment/Singapore Environment Council (1992-1996), Work-Group on Nature Conservation (1992) and Inter-Varsity Council on the Environment (1995-1997). He is Patron of the Singapore Gardening Society and was appointed Honorary Museum Associate of the Lee Kong Chian Natural History Museum (LKCNHM) in 2012. In 2005, Dr Wee started the Bird Ecology Study Group. With more than 6,000 entries, the website has become a valuable resource consulted by students, birdwatchers and researchers locally and internationally. The views and opinions expressed in this article are his own, and do not represent those of LKCNHM, the National University of Singapore or its affiliated institutions.

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