Animals should seek shelter before major storm peaks
Description says it. During the storm peaks (red and dark gray periods), animals should already be sheltered or at least lying down. Maybe allow buffalo, bears, elephants, mammoth to be out, but It makes no sense for smaller animals (including large deer, wolves, cougars, hyenas, etc.) to be out milling around during storms that can kill the prospector. Smallest animals, such as rabbits, baby deer (and their mums), should shelter under trees, in mouths of caves, or under other overhangs.