Answering the question by not answering the question.
Taking 85 reports which occurred in Maine and the environs of Canada immediately adjacent thereto (i.e., those parts of Canada South/East of the St. Lawrence Seaway) that include information about the season, 21 occurred from December through February.
9 occurred from March through May, although none actually occurred in March.
32 occurred from June through August.
The remaining 23 occurred from September through November.
That would seem to suggest a seasonal pattern where Bigfoot enter the area in the summer, remain through the fall, and start leaving in the winter, with perhaps a straggler or two who hangs in there through the spring until vegetation comes back.
As an aside, once again I'm amazed at how these hoaxes, misinterpretations, and false stories are carefully lined up by the controlling conspiracy in the sky to create what looks like behavior one would expect from a living breathing creature.