Betty the Crow Makes a Hooked Tool from Wire
quisling76 · Demo · 1 min · 2006 · YouTube title: Tool-Making Crows
Why it's here
HN links it as the clearest demonstration that crows can fashion tools.
What it covers
A one-minute clip of the New Caledonian crow Betty bending a straight wire into a hook to retrieve food from a tube. It comes from a 2002 Science study on tool-making in crows.