User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-76.65.26.43-20110715012349/@comment-3062343-20110715014849

Well, Giggi look quite leech-like, so they may be annelids (or a relative of them). I believe some annelids have larvae as well, so it could be plausible. Although I don't really see why monsters have to fit into the taxanomic groups we have on Earth, so I'm content with simply saying that they're Flying Wyverns. Another unrelated question, why do traps only affect boss monsters? My first thought was that the traps contained some kind of pressure switch, which only activated the trap when a heavy enough monster stood on it. This makes sense for the majority of the monsters, but some large minions (Popo, Aptonoth, Cephalos, Zuwaroposu etc.) should weigh far more than small boss monsters (the Raptors), so I don't see why they are unaffected by traps.