I've been meaning to look up the saying that goes with magpies since first seeing them in Ireland this summer. Also: a group of magpies is called a "parliament."
One for sorrow, two for joy; Three for a girl, four for a boy; Five for silver, six for gold; Seven for a secret, never to be told; Eight for a wish, nine for a kiss; Ten for a bird that's best to miss.
I kind of prefer the version that ends at seven, but also there's one (found here) that goes to twelve.
Eight for a wish, Nine for a kiss, Ten for a letter, Eleven for Worse and Twelve for Better