Acridotheres melanopterus (Black WInged Starling/Mynah). This is a critically endangered bird, and I saw quite a few flying free at the central aviary, plus 5 on the side aviaries. All the ones in the smaller aviaries looked like the nominate subspecies, but at least 3 of the free-flying ones were from the Bali subspecies (A. m. tertius). They are obviously doing fine at Jurong.