One would think that is tool use. Even more
interesting is that it is for a use other than feeding. The Palm Cockatoo may
use a stick to make noise. Most egs. concern feeding. Other bird examples are
Egyptian Vultures and Black-breasted Buzzards using stones to break Ostrich
& Emu eggs. I think that the example of the Galapagos woodpecker finch
is famous because they probably to it frequently and so it is easy to document
(if you can get to the right part of the world). I have written to Carol
suggesting that she publish those notes.
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