ID?

Can anybody identify this little bird? It flicked its tail, like a wagtail, and was quite friendly.



(Seen at Kapas Island.)

Added later:

I found it. It's a white-rumped shama. You cannot see the white rump in this picture, but in one of the others (which is not as good) it is clear.

I think this one must be still a baby, because they are supposed to be shy, and this one definitely wasn't. It sang beautifully, though.