The Odd among the Common

The breakfast area was often "attacked" by Common Mynas (Acridotheres tristis) and Eurasian Tree Sparrows (Passer montanus). Whenever a plate of scraps was left unattended, these birds would come feasting on the plate. Along side with the mynas and sparrows, there is another unusual bird that followed along as scavenger. This solo birdie was spotted at the breakfast area since more than a week ago.

This solo bird is an escapee. In order to survive, it doesn't mind to be "weird one" among the group. And the group of mynas didn't mind it's company either. I was told that in some culture, it is believe that this kind of bird brings good luck to the owner. No wonder they are often put in the cage.

Though this is a common bird in the cage and yet I couldn't find this bird in my bird book. Can anyone assist to identify this pretty bird? Thanks.