Tweet of the Day is a series of fascinating stories about the British birds inspired by their calls and songs.Wildlife Sound Recordist, Chris Watson, presents the Carrion Crow. The crow is defined in Samuel Johnson's A Dictionary of the English Language as "a large black bird that feeds upon the carcasses of beasts." Crows have always suggested an element of foreboding. They are arch-scavengers and black mobs of them crowd our rubbish tips but they're also birds we admire for their intelligence and adaptability.