Snow Flea (Boreus hyemalis): The snow flea, a type of winter-active springtail, is active on snow surfaces in temperatures below freezing. It produces a natural antifreeze protein in its hemolymph that prevents ice crystal formation, allowing movement when other insects are dormant. These tiny arthropods emerge in winter to mate and feed on algae and detritus. Their dark color absorbs solar heat, aiding mobility on snow. Found in boreal forests across the Northern Hemisphere, they play a role in nutrient cycling during cold months. Their ability to remain active in subzero conditions defies typical insect behavior. The snow flea demonstrates that even minute creatures can evolve powerful biochemical defenses against extreme cold.
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