This is the war form of the werebats called Taryasino (sing. Taryasat). The shift into common noctules and have their main distribution all over Eurasia.
They are part of a fan made project for the World of Darkness Changing Breeds book. Before I forget that: the picture was inspired by the werewolf art of Steve Prescott, I don't know how the man does it, but he is really good his stile is one of those best suited for hairy man-beasts.