Oxford scientists have discovered that a crow called Betty is no bird-brain.
Betty astonished scientists by deliberately bending a straight wire into a hook and using it to extract food from a container, the journal Science said on Friday.
The feat, it is said, makes her the first animal other than a human that has shown a clear understanding of cause and effect, and fashioned a tool for a specific task using new materials not encountered in the wild.
Not even chimpanzees, our closest cousins, have this ability.
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