In birds, the bone is called a fork, but it is best known as the pit of desire. During the feast, the two take up the stone from all sides and draw, winning the one who remains in the hands of a large part of it. Artist Kate MccGwire, probably very similar like fun, not for nothing that she could collect the bones of 23,000 of which has created a huge spiral installation entitled as «Brood» (flock).