I just found an small tuba-ware container at the back of one of my draws, inside.. some old paper-thin birch-bark I remember collecting for firestarting, I opened it up to find lots of black crap at the bottom and hundreds if not thousands of minute mites running round on the bark! lol I wont be putting that in my sack now I've created a miniture world! Its funny to see those little guys flourishing in there when they've been stuffed away for probably 4-6 months.