97DD23(+0) · Philomela, Procne and Tereus changed into nightingale, swallow, hoopoe (or hawk): Tereus seeks to kill Philomela and Procne for having slain his son; in their flight the two sisters are changed into a nightingale and a swallow; Tereus is changed into a hoopoe or a hawk (Ovid, Metamorphoses VI 668) (+ variant)