Did you know, the only real difference between crows and ravens is that crows have five pinion feathers, and that ravens only have four. So the difference between a crow and a raven? Well, that’s a matter of… a pinion.
Crows' excellent memory helps them tell human friend from foe
Mystical Is Worshipped by Wild Crows -- One time it was a tiny piece of metal with the word "best" printed on it. "I don't know if they still have the part that says 'friend'," Gabi laughs, amused by the thought of a crow wearing a matching necklace.
Tower of London, Raven. Eight ravens are kept at the Tower of London. Their wings are clipped so they can't fly away. Legend has it that failing to have Ravens reside at the Tower will cause it to crumble and a terrible disaster shall befall England.