Big Brains, Clever Tools

For their size, crows have large brains, and they put them to good use.

New Caledonian crows, from the Pacific islands of New Caledonia, make their own tools in the wild.

They shape twigs and leaves into hooks and probes, then use them to pull insects out of holes in wood.

Very few animals make tools this way. It is one reason scientists study crows so closely.

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