Eurasian Golden Oriole
Oriolus oriolus
The male is striking in the typical oriole black and yellow plumage, but the female is a drabber green bird. Orioles are shy, and even the male is remarkably difficult to see in the dappled yellow and green leaves of the canopy. In flight they look somewhat like a thrush, strong and direct with some shallow dips over longer distances. Its call is a harsh "kweeaahk", but the song is a fluting weela-wee-ooo or or-iii-ole, unmistakable once heard, often with subtle variations between each phrase.
ID text from Wikipedia, CC BY-SA 4.0
Indian Golden Oriole
Oriolus kundoo
The Indian golden oriole is very similar to the Eurasian golden oriole but has more yellow in the tail and has a paler shade of red in the iris and bill. The male has the black eye stripe extending behind the eye, a large carpal patch on the wing and wide yellow tips to the secondaries and tertiaries. The streaks on the underside of females is more sharp than in the females of the Eurasian golden oriole. The European species is larger with a wing length of 149–162 mm in adult males compared to 136–144 mm in O. kundoo. The wing formula is also different with primary 2 longer than 5 in O.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play BeakBrainPhotos and recordings are credited to their authors under the licence shown. Full profiles: Eurasian Golden Oriole and Indian Golden Oriole.