Homer also mentions them in his Odyssey.
‘Winged Harpies snatch the unguarded charge away,
and to the furies bore a grateful prey.’ – Odyssey xx.77
The Iliad mentions a Harpy as being the mother of the horses of Achilles.
Automedon therefore yoked the fleet horses Xanthus and Balius, steeds that could fly like the wind: these were they whom the harpy Podarge bore to the west wind, as she was grazing in a meadow by the waters of the river Oceanus. (xvi 181)
Stories usually mention 3 Harpy sisters, and give them various names (Aello, Celaeno, Ocypete, Podarge)