Great Myna
Acridotheres grandis
It is black with elongated forehead feathers, forming a frontal crest that may curl backwards. Its beak and feet are yellow. It has white from the vent to the tip of the tail and a white wing patch.
ID text from Wikipedia, CC BY-SA 4.0
Javan Myna
Acridotheres javanicus
The Javan myna is a stocky, medium-sized bird measuring 21–23 cm (8.3–9.1 in) in length and weighing approximately 100 g (3.5 oz). The plumage is mainly black with a slight glossy sheen. The wings are brownish-black, and the primary feathers have white bases that form a striking white wing bar visible during flight. A white tail bar is also displayed in flight. The undertail coverts are white, which is the basis for the alternative name "white-vented myna". A short, erect crest adorns the forehead. The beak, legs, and feet are bright yellow. Voice: The Javan myna has a varied vocal repertoire similar to that of the common myna. Calls include loud whistles, chattering, and harsh, grating notes. The species is often vocal, particularly at communal roosts where large numbers gather in the evening and produce a considerable cacophony.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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