black cockatoos in formation in cloudy blue sky

air animal animals australia australian bird birds black black-cockatoo black-cockatoos bottom-up braunkopfkakadu calyptorhynchinae calyptorhynchus casuarina cheeky cloudy cockatoo cockatoos cockies curious endangered endemic exotic fauna feisty firmament flight flock fly flying formation free freedom lathami low-angle native natural nature ornithology outdoor outside parrot parrots perky rabenkakadu seven shot sky species tropical unique up upward view vulnerable watch watching wild wildlife background gliding blue