Tiny cameras attached to New Caledonian crows' tail feathers are offering new insights into the birds' behaviour in the wild.
The crows, famous for their impressive tool-making and using abilities, are also notoriously difficult to observe in their native environment because they live in forests and are very shy.
http://www.newscientist.com/article/dn12738-tool-use-by-shy-crows-caught-on-camera.html
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