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Lightning Crick to Trestle crick Cabinet Mountains Idaho 12 degrees and about 1 foot of snow up top. Bullwinkle would not yield the road for awhile.

I think some are some aren't. In my area we see indications of both. My hunting / hiking / bigfooting buddy works some weekends on a ranch where there appears to a low level of year around activity. Likewise, where we hike, camp, fish, and where I do my main research, the activity is very very seasonal and can seemingly be followed leading up to presence there and after presence there ends. I would expect that in some areas with different conditions there would be a greater propensity towards year round occupation in some place and greater propensity towards only seasonal occupation .. ie migration. So I think you have to look at the specifics of a given location and answer for that location rather than trying to give a single answer that covers all situations, all locations. There is a hole in that as well, potentially, and that is that it is not just "my" spot that is active at that one time, there's a mountain chain over 1000 miles long and the activity peaks within a week in any given year the whole length of the dang thing so it is possible that rather than migration, what we're seeing is some quirky seasonal change of behavior. Or .. BOTH. Because, again, we do see activity to the north 4-6 weeks earlier and to the south 3-4 weeks later. It may be both migration and seasonal something peaks converging. The data is sparse and we have to be cautious about over-investing in specific interpretations which might not fit a fuller data set.