The Palm Cockatoo is a very large member of the Cockatoo Family. He uses his extremely long and powerful bill to crack open nuts and seeds. His red cheek patch changes colour when he becomes excited or alarmed. One particularly unusual trait is the tendency for the male bird to break off a sturdy branch, which he then drums against the trunks of trees, creating a sound that can be heard up to 100m away. The purpose of this is unknown but is considered to be either a territorial display or a manner of accessing the durability of nesting hollows.
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