It is the New Caledonian crow, not the common American crow, which is world-renowned for its tool use. They are capable of making a using a variety of tools to forage for invertebrates in dead wood. There are apparently at least four different types, and they are the most complex animal tools yet discovered. Check the citation for a links to pictures of the bird and their tools, as they do a better job of showing the types of tools than I ever could with mere text.
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