Black-crested Bulbul
Rubigula flaviventris
The black-crested bulbul is 18.5–19.5 cm in length. The head is black with a distinct crest and a yellow iris, while the rest of its body is greenish yellow above and yellow below, and a greenish-black tail. The bill and the feet are black. In the subspecies R. f. johnsoni, the throat is red. Both the male and female are similar in plumage; young birds are slightly duller.
ID text from Wikipedia, CC BY-SA 4.0
Yellow-browed Bulbul
Acritillas indica
This bulbul is about 20 cm (7.9 in) long, lacks a crest and has the upperparts olive-green with a prominent yellow brow and goggle with the underparts being all yellow. The sexes do not differ in plumage. The bill is black and the iris is reddish brown. The population in the northern Western Ghats (ssp. icterica) is paler yellow than the populations further south (ssp. indica). A somewhat disjunct population is found in the Eastern Ghats. Southwestern Sri Lankan populations (ssp. gugliemi) are greener while the northern populations are included in the nominate subspecies.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Black-crested Bulbul and Yellow-browed Bulbul.