User blog comment:Mckrongs/Monster Hunter Frontier Season Forward 1/@comment-1011548-20110420085446/@comment-969093-20110420161258

Well, I believe to have seen that only happens when the hunter is within the gravitational circle around the Rukodiora and only when he is under that weird new ailment.

Also, it seems that the wings might be it's weak spot. And I believe I saw some people speculate that his source of power is within the wings, rather than the horns for our well known 2nd gen favourites.