Ok.... so these birds are Indian Robins. And not Pied Bushchats as I had guessed. Thanks to the birder - Chandu who pointed it out, and gave me a detailed explanation about the vent - which is pinkish orange, the white patch on the wings, etc.
More information about the birds here - http://en.wikipedia.org/wiki/Indian_Robin
Well, i do have a couple of interesting experiences with these little birds, and will share them soon.
Till then, Ciao!