The Wolves
I'm not a wolf expert, so I don't know how realistic wolves act, but the wolves in this movie seemed really over the top and contrived.
First of all, are wolves really this aggressive? Do they really always attack the first human they see immediately (except when busy eating a corpse)?
And what was with the wolves hanging around the one spot where the characters were stuck? It's like they were vultures buzzing around their prey in the desert. In this case it seems really silly. How would they even know to look up and see humans above them, then assume the humans would eventually come down? That seems like it would require intelligence beyond animal instinct.
I liked this movie, but the wolves took away from the quality somewhat. The main appeal of the movie was supposed to be humans surviving elemental conditions, but they kind of turned it into a more traditional horror movie involving a killer stalking people. Seemed like a very lazy plot device.