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Oriental Honey Buzzard or Blyth’s Hawk Eagle?

on 17th May 2009

Jason Cho was at Singapore’s Mandai Orchid Garden on the morning of 1st May 2009 when he saw an eagle being mobbed by a few smaller birds. He managed to photograph the raptor in flight (left) as well as when it eventually landed on a tree (below left). At the same time Micky Lim succeeded getting an excellent portrait shot (below right).

Jason tentatively identified the raptor as a Blyth’s Hawk Eagle (Spizaetus alboniger), a rare non-breeding visitor to Singapore. It has been regularly sighted in the nearby Johor state of Malaysia where it is found in heavily forested areas. The handful of sightings in Singapore were probably birds that strayed from Johor.

Jason’s posting in the forum NaturePixels attracted the attention of other photographers who suggested that the raptor could be an Oriental Honey Buzzard (Pernis ptilorhyncus). KC Tsang agreed, pointing to the “chicken-like” head, slit nostrils and generally un-feathered legs as his reasons.

Two subspecies of the Oriental Honey Buzzard have been sighted in Singapore: torquatus, an uncommon non-breeding visitor and orientalis, a common winter visitor and passage migrant. The former is thought to have wondered occasionally from nearby Malaysia.

The controversy is fueled by the darker plumage of the bird, tending towards Blyth’s Hawk Eagle rather than Oriental Honey Buzzard. Finally, “jiaolong” brought closure to the controversy by locating a link to the Thai Raptor Group that points to the possibility of an Oriental Honey Buzzard of the “Tweeddale” morph. According to Ferguson-Lees & Christie (2001), this morph is more blackish but with white throat, sometimes, collar-like, as seen here, and bold white barrings below. This darker morph is seen in Peninsular Thailand and Malaysia, Sumatra and Borneo.

Images by Jason Cho (flight and head) and Micky Lim (portrait).

Reference:
Ferguson-Lees, J. & D. A. Christie, 2001. Raptors of the world. London: Christopher Helm. 992 pp.

This post is a cooperative effort between NaturePixels.org and BESG to bring the study of bird behaviour through photography to a wider audience.

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.

Other posts by YC Wee

2 Responses

  1. Hi there,it doesn’t look ike a Blyth’s to me. The specimen has a plain breast, while the Blyth’s (normally) has a checkered breast, or at least some black streaks.
    Pleased to be of any help

  2. The Honey buzzards did not stand much chances against fiercer bird of preys, so they tends to imitate fiercer bird of preys. The Oriental Honey-Buzzard is known to imitate the looks of the CHE, so now it seems that the Blyth’s is also one they tend to imitate.

    The Honey Buzzards in Europe imitates the Common Buzzard on the other hand.

    These imitations makes OHBs a bit hard to be told apart when not well seen, there slender pigeon/chicken like head however usually betrays them as it offers a very different looking jizz.

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