No, I'm not very good with Photoshop... |
In our reality, though, they couldn't exist, since they mix and match mammalian and avian features in a way that doesn't happen in natural evolution. Even in the world of D&D they're usually said to be the creation of some long-dead wizard, rather than something natural - although it's worth noting that other hybrid creatures, such as griffons, aren't regarded in the same way. Still, it's at least interesting, for someone like me who writes a lot about real world animals, to consider how such a creature would work if, somehow, it really existed.