Australian aviculture beak bird black body bright cacatua-galerita caged captive cockatoo colors colours conspicuous crest curled curling curved-beak dark-grey-black-bill distinctive eye feathers fluffy head iconic intelligent large mimicry Noisy numerous parrot plumage popular powerful screeching strong sulphur-crested white wings yellow ara-ararauna blue blue-and-gold-macaw blue-and-yellow-macaw blue-dorsum brilliant cage claws colorful colourful decorative green macaw mesh monotypic neotropical-parrot netting pointed shade sharp South-American-parrot steel-frame talkative tree-trunk vivid wood yellow/orange-venter