Australian cockatoos birds cockatoo grass eaters pets seed eaters sulphur crested cockatoo white white cockatoo yellow abundant affectionate Australia-wide Australian Australian-parrots Australian-pink-cockatoo bird common eolophus-roseicapillus familiar friendly galah galahs grass-feeder gray intelligent parrot pet pink-and-grey rose-breasted-cockatoo rose-pink roseate-cockatoo rosies seed-eater social widespread willock-cockatoos grey perch perched perching post black cockatoo Carnaby black cockatoo endangered large protected short-billed threatened Western Australian white cheek patches white tail panels ruffled ruffled feathers Australian-pink-cockatoos electricity iconic like-musical-scale lines observant observing power-lines resting score watchful watching wild wires animal animals Cockatoos colour colourful colours feathers fowl park parrots zoo