So I love both the first and second films, but one thing bothers me. What is the monsters actual purpose for being? Sounds silly I know, but basically all we've seen them do is hunt with the purpose of killing specifically. Nothing ever seems to be about killing to eat, they hear noise, and they attack, period. Kill one thing, then another, and another, and so on. They aren't like an apex predator here that hunts to eat. Given this film series isn't over that's one thing I'd like some elaboration on. I don't really need anything deep about their origin, but why they exist, period. They don't appear to be pack animals as far as we can tell either, just solitary organisms that kill as much and as often as they can. That would be in line with an organism that's basically a bio-weapon.