And, although New Caledonian crows, which also make tools in the wild, can manage the hookmaking trick, wild rooks are tool-using virgins.

ECONOMIST: Tool use by non-tool-using animals

In 1996, a group of New Caledonian crows in New Zealand were observed making and using hooked twigs as tools to capture food.

ECONOMIST: Ethology

In 2011, Jenny Holzhaider of the University of Auckland, New Zealand, and her colleagues looked at an even more distantly related species, New Caledonian crows.

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The Glenearn Community Campus will be a new purpose-built facility in Perth to replace Caledonian Road Primary and Friarton Nursery.

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