Ernie Janes / Red-tailed black cockatoo (Calyptorhynchus banksii) Freycinet National Park, Tasmania, Melbourne, Victoria, Australia.

Jiri Lochman / Yellow-tailed Black Cockatoo (Calyptorhynchus funereus) feeding, Thirlmere Lakes National Park, Greater Blue Mountains UNESCO Natural World Heritage Site, New South Wales.

Dave Watts / Yellow-tailed black cockatoo (Calyptorhynchus funereus) eating banksia cones. Tasmania, Australia

Dave Watts / Yellow-tailed black cockatoo (Calyptorhynchus funereus) eating banksia cones. Tasmania, Australia

Dave Watts / Yellow-tailed black cockatoo (Calyptorhynchus funereus) Tasmania, Australia

Dave Watts / Yellow-tailed black cockatoo (Calyptorhynchus funereus) Tasmania, Australia

Dave Watts / Red-tailed black cockatoo (Calyptorhynchus magnificus) adult female. Victoria, Australia

Dave Watts / Glossy black cockatoo (Calyptorhynchus lathami) male (right) and female. Kangaroo Island, South Australia.

Roger Powell / Red-tailed black cockatoo (Calyptorhynchus banksii) pair resting in the upper branches of a eucalyptus tree. Leaning Tree Lagoon, Northern Territory, Australia.

Roger Powell / Two Red-tailed black cockatoos (Calyptorhynchus banksii) pair resting in a tree. Leaning Tree Lagoon, Northern Territory, Australia.

Roger Powell / Red-tailed black cockatoos (Calyptorhynchus banksii) male landing at a muddy area to feed on minerals in earth, Leaning Tree Lagoon, Northern Territory, Australia.

Michael D. Kern / Red-tailed black cockatoo (Calyptorhynchus banksii) tail feather against black background.