These monsters are one of my favorite birds. Sometimes described as the "Australian Mafia," they are extremely impressive when seen in life. Photos do not do them justice. I was totally unprepared when I first encountered them several years ago. I expected them to look like a typical cockatoo, just black instead of white. Instead, these birds are HUGE (about 2 feet long) and fly with the slowest wing-beats of any bird I have ever seen. One book says "funereal" in describing their flight. This is a female or immature lacking red tail patches.
The population in Northern Australia is assigned to the large-billed race C. b. macrorhynchus. Older books give the specific name as C. magnificus, but that name had to be suppressed because its type description was of an immature Glossy Black-Cockatoo (C. lathami).
Digiscoped with Panasonic DMC-LZ5 | Nikon FieldScope III | 30XWA | hand-held (no adapter)