The Sphinx is a female monster that has the body of a lion and a woman's head. She is sometimes said to have eagle wings. She was sent to terrorize the town of Thebes to punish them for an old crime. She sat at a road and asked all travelers a riddle. "What walks on four legs in the morning, two legs in the evening, and three legs at night?" Oedipous solved her riddle by answering, "Man," and the Sphinx threw herself off a cliff.