By Cycylone62 or Mythologysleuth
A Pterippus or Pterippi (plural), also known as the Winged Horse or Flying Horse is a species of bird-winged horses. Technically, this is the correct name for winged horses as a species in the ancient Greek language, however, the name Pegasus or Pegasi has been generally accepted in modern times to describe the species as well.
Pterippi grooming by Mythologysleuth (Cyclone62)
But some common pterippi’ colours and also them paripating in communal grooming. because of their wings, they need to preen their feathers this is done through grooming, and having a herd makes reaching the harder to reach places easier.
From the ancient Greek πτερόν (pterón, “wing”) + ἵππος (híppos, “horse”).