“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.
“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.
“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.
“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