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Corvidae is a cosmopolitan family of oscine passerine birds that contains the crows, ravens, rooks, jackdaws, jays,magpies, treepies, choughs and nutcrackers. The common English names used are corvids (more technically) or the crow family (more informally), and there are over 120 species.
They are considered the most intelligent of the birds, and among the most intelligent of all animals having demonstrated self-awareness in mirror tests (European magpies) and tool making ability (crows, rooks)—skills until recently regarded as solely the province of humans and a few other higher mammals. Their total brain-to-body mass ratio is equal to that of great apes and cetaceans, and only slightly lower than in humans.
From Wikipedia http://en.wikipedia.org/wiki/Corvidae
They are considered the most intelligent of the birds, and among the most intelligent of all animals having demonstrated self-awareness in mirror tests (European magpies) and tool making ability (crows, rooks)—skills until recently regarded as solely the province of humans and a few other higher mammals. Their total brain-to-body mass ratio is equal to that of great apes and cetaceans, and only slightly lower than in humans.
From Wikipedia http://en.wikipedia.org/wiki/Corvidae
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