This was the best picture of them i could get. I was at Mapleton falls lookout at sunshine coast where there were about 3 or 4 cockatoos flying around screetching loudly. I couldnt get a good picture (Obviously judging but the look of this picture) but im hoping someone might be able to help me out based on there behavour. They seemed to like hanging out in the gumtrees whilst doing loops around the sky as a flock then landing back again.
Yellow tailed black.
I'll second that. In the first photo you can see the yellow cheek mark, and the secind picture shows it's size. The Glossy black cockatoo is considerably smaller in size than either the RTB's or the YTB's.
I hope this helps!