If a Chimp found itself in a colder climate? Maybe?
Or something else built it and the runaway Chimp simply utilized it somehow?
Or the DNA lab accidentally put a unknown primate dna signature into the Chimp category?
I have seen Oliver walk. He was creepy.
I still say the Jacobs creature is a Chimp and not a Bear. I was a houndsman once and was on a houndsman forum and one guy swore up and down that him and his hounds encountered an African Lion on a hunt back east. It ran off and he gathered up his hounds and left. White as a ghost. The eastern woods I think have some strange things running around back there. A long history of zoos and plenty of thick woods to hide in.
Lastly? I just thought of this? Maybe some of these stick structures are indeed shelters but the leaves or needles used as the final layer have decayed or blown away and all that remains is the rib supports? They would take a lot longer to rot away. Years. Just a thought.