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“One well-documented use of tools on a grand scale by crows around the world is the dropping of nuts on the road to be shelled by passing cars. The crows will swoop in, drop their nuts, and wait on a wire for a vehicle to pass. They will then swoop down again to see whether their nuts have been crushed open.”

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source: Crow Planet (New York: Little, Brown and Company, 2009), 72.

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medium: Nonfiction

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