In the same flock of corellas in Victoria Park, Sydney, some of them are distinctively different with pink splashes on their throats. Obviously, there is another life form in the group, the long-billed corellas (Cacatua tenuirostris). I begin to wonder why these two birds are grouping together in the urban environment. They are clearly closer cousins in the cockatoo family (Cacatuidae) than the somewhat more urbanised sulphur-crested cockatoos (Cacatua galerita). They are all social birds, anyway.

Like little corellas, their distribution in Australia has crossed into the city, only much smaller and just in the Sydney area, regarding Wikipedia.

This old one is isolated from the others. While the rest is called out and go to the trees, it still is picking grass seeds from the ground. It lets me approach close to get these shots, so close that I can notice a tag on its foot. Apparently, it is experienced being photographed.