The "Crows Nest" on a ship (the basket near the top of the mast) used to actually contain a crow. The ships navigator would use one of the birds as a guide in bad weather, since they invariably flew towards land.
DID YOU KNOW? Marlon Brando hated memorizing lines so much that he posted cue cards everywhere to help him get through scenes.
He even asked for lines to be written on an actress's posterior. (That request was denied.)