There appears to be immobile bug wings on Owlcat mobs around Azuna.

The Veil Prowler (ID 109351) and the Feathered Prowler (ID 106920) are two NPCs that display this issue. Perhaps other owlcats do as well but definitely not all of them.

Example image:

http://forums.wow-petopia.com/download/file.php?id=28527

I saw this to.. i was so confused but I'm glad I'm not the only one.