User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-184.76.116.24-20120906185036/@comment-4212769-20120906190751

Then they will inevitable go extinct when there are only those from this old culture left and they don't reproduce.

http://monsterhunter.wikia.com/wiki/User_blog:Mckrongs/Monster_Hunter_4_for_the_Nintendo_3DS?page=6#comm-160165

That's my theory about the wings.