City of Ravens The Extraordinary History of London, the Tower and Its Famous Ravens

Tales tell of how Charles II, fearful of ancient legends that "Britain will fall" if the ravens at the Tower of London ever leave their abode, ordered that the wings of the six ravens be clipped.But the truth is that the ravens only arrived at the Tower in 1883, when they were brought in as props in tales of Gothic horror that were told to tourists. The legend itself originated from the summer of 1944, when ravens in London were used as unofficial spotters for enemy bombs and planes.