>>784569In Canada you would need perfect knowledge of local edible plants. Lots of stuff that's edible, but also lots of stuff that'll give you the shits or just kill you. Lots of wild blueberries, strawberries and raspberries were I live, as well as other berries that taste like crap but are edible. Very easy to pick a bucketfuls in some places, though I guess you'd deplete them eventually. There are various edible leafy plants and tubers, but I have no idea which are which and wouldn't try eating them unless desperate.
Fishing would probably be your main source of protein because it's just so much easier and more reliable than snaring small game or bow hunting. Building a fish trap would be the way to go in most places. Lot of shellfish around the coasts. Some places have fairly large gamebirds like partridge which are dumb as stumps and pretty easy to kill. Seal is a possibility, though probably a tall order for a single primitive hunter - they're just heavy and going on the ice alone is dangerous as hell. Large game like deer, caribou, moose, or bison are not practical options in this situation: if you were dropped in the wilderness you wouldn't easily be able to construct a bow capable of killing one, and in the unlikely event that you were able to stalk and kill one the majority of the kill would rot before you could eat it. Just not calorie profitable for an individual with no tech to draw upon.
It also depends on where you are of course. Some places would be much easier to live in than others. BC and Southern Quebec & Ontario would be relatively easy, which is why they had much larger native populations than say Newfoundland or the Maritimes.