The Harpy(Daemon volucer.) are foul creatures which scavenge for food and are not above stealing it from travellers.
They are 5 feet long with an 8 foot wingspan. Their body is hawk-like with an ugly human face. Harpys dwell on Greek crags. Avoid eating near them unless you are not actually hungry as they have poisonous dung. Mythology provides information about repulsive ways in Greek myths.