Sasquatch, or bigfoot, usually walk on two feet. Not four, as stated in the caption of the photo. At first, it looked like a hungry bear with its head down or some kind of animal. If it's not any known animal, it might be a window faller. Things have been stranger lately, with new creatures been popping up.
But, basing on these photos alone, it cannot be determined as to what it is. I don't see any other evidence that they provided along with these photos, such as cased footprints or droppings or determined sizes or such. At least, that's my initial thought.
fwiw