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Spectacled Bulbul – subadults/immatures and juveniles

YC Wee
on 7th November 2017

BulbulSp-Subad imm [AmarSingh] 1

“There are many juveniles in the forest at this time. When they congregate at a fruiting ficus tree it is hard to differentiate juvenile species easily as parents are often not feeding the young.

BulbulSp-Subad imm [AmarSingh] 2

“Images at top and above are of a young Spectacled Bulbul (Pycnonotus erythropthalmos) are of a subadult/immature bird where the eye marking are adult (red iris with yellow eyelid-rims) but the bill is black with yellow at nostrils and mouth as seen in juveniles (all black in adults). The oral cavity is bright yellow-orange. The plumage is still moulting into adult plumage.

BulbulSp-jv [AmarSingh] 1

“A juvenile (above, below) which has an off-white eyelid-rims, pale pink oral cavity and no orange/yellow in bill are shown above and below. The iris in juveniles is said to be ‘light brown’ (Wells 2007) but my observations show it is a darker red-brown. Some gape is present.

BulbulSp-jv [AmarSingh] 2

“Both subadult and juvenile birds were feeding independently.”

Dato’ Dr Amar-Singh HSS
Ipoh, Perak, Malaysia
2nd August 2017

Location: Kledang-Sayong Forest Reserve, Ipoh, Perak, Malaysia
Habitat: Trail along primary jungle

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

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Any views and opinions expressed in the articles 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.

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