A cockatoo uses the first tool to punch through a membrane (IMAGE)

Cell Press

A cockatoo uses the first tool to punch through a membrane

Caption

This is a photograph of a cockatoo using the first tool (a sharp stick) to punch through a membrane.

Credit

Thomas Suchanek

Usage Restrictions

Credit must be given to the creator. Adaptations must be shared under the same terms.

License

CC BY-SA

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