χελιδών

1. the swallow , (Odyssey by Homer), etc.:—; the twittering of the swallow was proverbially used of barbarous tongues by the Greeks, (Aeschulus Tragicus); χελιδόνων μουσεῖα (see. μουσεῖον); proverbs also, μία χελιδὼν ἔαρ οὐ ποιεῖ (Aristotle Philosopher)

2. the frog in a horse's foot , so called from its being forked like the swallow's tail , (Xenophon Historicus) (ML)