Virgil [1265-1321 CE] (Aeneid, Book III): But suddenly the Harpies are upon us, swooping awfully from the mountains, and shaking their wings with loud clangor, plunder the feast, and defile everything with unclean touch, spreading a foul smell, and uttering dreadful cries. Again, in a deep recess under a caverned rock, shut in with waving shadows of woodland, we array the board and renew the altar fires; again, from their blind ambush in diverse quarters of the sky, the noisy crowd flutter with clawed feet around their prey, defiling the feast with their lips. ... they take no violence on their plumage, nor wounds on their bodies; and soaring into the firmament with rapid flight, leave their foul traces on the spoil they had half consumed. - [J. W. Mackail translation, 1885]

Dante Alighieri [1265-1321 CE] (Inferno, Canto XIII): Here the repellent harpies make their nests, / Who drove the Trojans from the Strophades / With dire announcements of the coming woe. / They have broad wings, with razor sharp talons and a human neck and face, / Clawed feet and swollen, / feathered bellies; they caw / Their lamentations in the eerie trees.

Thomas of Cantimpré [circa 1200-1272 CE] (Liber de natura rerum, Birds 5.4): The harpy is a bird, as Andelmus says, in remote parts of the world, in a place called Strapodes, in a wilderness near the Ionian sea. Its ravenous hunger is almost always insatiable. It has claws hooked and always ready to tear and snatch. It has a human face, but no human virtue in itself. For it is raging with ferocity beyond human means. The first man it sees in the desert it kills. Then when by chance it found the waters and beheld its own face in the waters, it was immediately saddened immeasurably when it saw that it had killed a man like itself; This bird, once domesticated, speaks with a learned human voice, but lacks reason. - [Badke translation/paraphrase]