I saw a flock of about 8 cockatoos at Southern Lamington in SEQ yesterday. Just confirming that these are Glossy Blacks and not Red Tailed Blacks.
Sorry about the average photos but in the 3rd photos i noticed a yellow band around the neck which in addition to the area located indicates that they indeed are Glossy Blacks.
Let me know your thoughts.
Hard to tell from the pics, but the following site might be of use/interest: http://glossyblack.org.au/
Cheers
Tim
Brisbane