Yes, I know that the movie is about the search for it, but...
[SPOILERS!]
Whatever it is is never shown. The wood knocking and rock throwing can be explained by the presence of the naked woman. And the vocalizations and animal roars sounded distinctly not apelike. I don't know where Bobcat wanted the audience to land, but I'm far more likely to suspect a crazy woman and her feral dogs rather than Bigfoot was to blame.
If you've ever seen "Finding Bigfoot" or any other shows where they are looking for sasquatch, those are exactly the vocalizations they supposedly hear, and the rock-throwing and wood knocking are also signs of bigfoot. Add to that the fact that the setting for the film is the location of the best-known bigfoot sighting and the fact that the protagonists are hunting for bigfoot, then I'd say it's safe to assume that it's supposed to be a sasquatch that is responsible for what happens to them. Just my take on it, though. The couple themselves keep speculating that it could be people just messing with them. So it's open to interpretation.
---
🌙 Ride with the moon in the dead of night!
it's best left open
Ja?
wuz way phun
O &
by the bye
sas qua watch
is a rough term 4 the concept
across several populated & sparsely populated areas areas
wha' the beins wha' came out of Africa "homo saps" if you will
ran in to some thing
wha' wuz aready where they wanted 2 spread
call'em what u will
so
the story goes
sum da' "Homo Saps" mixed
as it were
maybe volunteer
or as here
maybe not so so so willin'
andy whoo
sum them mixed
look lot like "homo Sap" & r allowed 2 further mix
but carry the genetic code
so
sum them what appear 2 b "homo sap" when they mix
the baby looks wrong
or is otherwise more them than us
& must seek out they own kind
that's the story andy whoo
Sie haben mich verloren ~ avec la haine