There not monsters as such they are races, i shall describe them a bit bellow for you.Avariel:
Rarest of the elven races, the avariel, the winged elves, live a reclusive existence, seldom seen by outsiders. Such is their scarcity and seclusion, that their status is almost that of legend, and many believe tales of these winged elves to be little more than myth and wild fancy.Raptoran:
These are cliff dwelling avian humanoids who dwell in canyon walls and other precipices. Possessed of feathered wings, they soar high above their desert and mountain homes, using their sharp eyesight to hunt for food and defend their homes. In achient times the Raptroran made pacts with Elemental lords of Air whom granted them there ability to fly and soar.
I hope that helps :)