Reincarnation as Birds

ἰδεῖν μὲν γὰρ ψυχὴν ἔφη τήν ποτε Ὀρφέως γενομένην κύκνου βίον αἱρουμένην, μίσει τοῦ γυναικείου γένους διὰ τὸν ὑπ᾽ ἐκείνων θάνατον οὐκ ἐθέλουσαν ἐν γυναικὶ γεννηθεῖσαν γενέσθαι: ἰδεῖν δὲ τὴν Θαμύρου ἀηδόνος ἑλομένην: ἰδεῖν δὲ καὶ κύκνον μεταβάλλοντα εἰς ἀνθρωπίνου βίου αἵρεσιν, καὶ ἄλλα ζῷα μουσικὰ ὡσαύτως. εἰκοστὴν δὲ λαχοῦσαν ψυχὴν ἑλέσθαι λέοντος βίον: εἶναι δὲ τὴν Αἴαντος τοῦ Τελαμωνίου, φεύγουσαν ἄνθρωπον γενέσθαι, μεμνημένην τῆς τῶν ὅπλων κρίσεως. τὴν δ᾽ ἐπὶ τούτῳ Ἀγαμέμνονος: ἔχθρᾳ δὲ καὶ ταύτην τοῦ ἀνθρωπίνου γένους διὰ τὰ πάθη ἀετοῦ διαλλάξαι βίον.

He saw the soul that had been Orpheus’, he said, selecting the life of a swan, because from hatred of the tribe of women, owing to his death at their hands, it was unwilling to be conceived and born of a woman. He saw the soul of Thamyras choosing the life of a nightingale; and he saw a swan changing to the choice of the life of man, and similarly other musical animals. The soul that drew the twentieth lot chose the life of a lion; it was the soul of Ajax, the son of Telamon, which, because it remembered the adjudication of the arms of Achilles, was unwilling to become a man. The next, the soul of Agamemnon, likewise from hatred of the human race because of its sufferings, substituted the life of an eagle.

Plato, Rep. X.620a-b [Trans. by Paul Shorey].