re: Game of Thrones S7 E6 "Beyond The Wall" MAESTERS THREAD NO SPOILERS

Based on them being enormous. We're talking about a giant beast propelling itself with slow moving wings. I suppose they might learn to fall in a controlled way like a slower peregrine, but not propel themselves horizontally at break neck speeds like a swift.

Anyway. That's not really my primary complaint about this episode. My complaint is the whole episode was one big deus ex maguffin.