The sulphur-crested cockatoo can be found throughout Australia’s northern and eastern mainland, and Tasmania. A small population has also become established around Perth, Western Australia. Their normal diet consists of berries, seeds, nuts and roots.
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When not feeding, cockatoos will bite off smaller branches and leaves from trees. This may help to keep the bill trimmed and from growing too large. It is this behaviour that causes many suburban Australians to consider them as pests as timber decking, outdoor furniture, window frames and paneling seem to be an appropriate alternative to tree branches.