I would assume the visuals are key here. You can’t normally hear birds flapping anyway. These just look like birds until its too late.

These would have fantastical scouting capabilities. Pretty alright at being undercover as long as the target isnt looking for them. You could easily storm a few places unexpectedly with a little bit of explosives and these. This is that shit the Wizard and the evil chick were drooling over in Wicked.