Three or four Yellow-tailed Black Cockatoos flew in from the north-west. The first bird I saw was low to the ground, on a fallen down branch, pulling the bark away from it. I then noticed some more birds around. There were three birds in one area, with two on a branch chewing away at the bark. At one stage there was a male on the right of the branch. He was pushed away from his location by either a female or a juvenile, it was not clear to me.