User blog comment:Lightning the Skrill/Snow Wraith Frost?/@comment-25863920-20150710114042/@comment-25046825-20150712103011

Aaah, but you see there is in fact a lot of anatomical differences in the wing structure and body structure at a quick glance they look similar, but they have infact very different body structures it would take a fictional force to get these creatures in the air. Even if they could fly like bats the structure of their wings would prohibit them from gliding (like bats) and they would strugle to take off without the assistance of gravity.

But hey this is a fictional universe not everything has to be accurate.