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Originally Posted by phoenix
One species, the New Caledonian Crow, has also been intensively studied recently because of its ability to manufacture and use its own tools in the day-to-day search for food, including dropping seeds into a heavy trafficked street and waiting for a car to crush them open.
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I saw a show on this! It was really cool. They take nuts and seeds, fly up to some power lines over an intersection, wait till the light turns red, drop the nuts/seeds into the road, wait for the light to change and for the cars to run over the nuts/seeds, then they wait for the red light again so they can fly down and pick up the cracked nuts.
They also showed this study where they put a piece of food in a jar where the crows couldn't reach it with their beaks, so they gave them lengths of wire and the crows would use the wire to fish out the food inside the jars.
Cool birds.