Missing animal parts epidemic in Pandaria: solved?

While adventuring in the Krasarang Wilds, I complained quite a bit about a quest called The Murksweats, given by Anduin Wrynn (yes, even to the Horde). Here's why: nothing about the quest says that I need Pristine Murkscale Heads, or Undamaged Murkscale Heads, or even Particularly Venomous Murkscale Heads - I just need Murkscale Heads, and yet 7 out of every 8 snakes does not drop a head. Let me reiterate how stupid this is: the snake, which has just been biting me with its head, no longer has a head. I apparently turned it into a fine red mist.

This is irritating enough, but yesterday, leveling my hunter in the Jade Forest, specifically in the area around Grookin Hill, I started running into bugs that didn't have legs and, even more inexplicably, birds that didn't have any guts. Then I started thinking after talking to Fimlys and Ratshag this morning: what do these two things have in common?

While I'm out murdering these animals, the Horde expedition is bringing Anduin Wrynn to Grookin Hill.

Ladies and gentlemen, I've found the person with the reality-warping aura that is causing vital body parts to disappear from Azeroth's wildlife, and his name is Anduin Wrynn. We must kill him before this disappearing-body-parts epidemic goes any further.

It's for the good of the planet.

(Note: reports are unconfirmed as to whether Anduin is responsible for the disappearance of tongues from the mouths of mushan. Investigation is ongoing at this time.)