Not my photo, but I do have these birds in my garden at times. They like the pine cones on the tall pine trees down the bottom of my garden. They seem to come in pairs in groups of 6 or more.
Journaling reads ...
Calyptorhynchus funereus
The Yellow-tailed Black-Cockatoo is a large (55 - 65 cm) cockatoo. It is easily identified by its mostly black plumage, with most body feathers edged with yellow, not visible at a distance. It has a yellow cheek patch and yellow panels on the tail. The female has a larger yellow cheek patch, pale brown bill (grey-black in males) and black marks in the yellow tail panels. Young birds resemble the adult female, but young males have a smaller cheek patch.