Australian cockatoos birds cockatoo grass eaters pets seed eaters sulphur crested cockatoo white white cockatoo yellow beak bird finch grass plant seed eater small water endangered grass eater horn killed poached rhino white rhinoceros animal grass-eater mammal nature resting rhinoceros wildlife Australian galah grass feeder gray pink and grey Australian-raven bearded bill black blue-black carrion-eaters corvids corvus-coronoides crow foraging garbage-collectors loud mournful omnivorous predators raven ravens scavengers sharp-eyed shiny-black strong abundant affectionate Australia-wide Australian-parrots Australian-pink-cockatoo common eolophus-roseicapillus familiar friendly galahs grass-feeder intelligent parrot pet pink-and-grey rose-breasted-cockatoo rose-pink roseate-cockatoo rosies seed-eater social widespread willock-cockatoos