Wildlife photography of head and antlers a bull moose with yellows leaves, after a fall rain shower in Grand Teton National Park

After a Fall rain shower in Grand Teton National Park, a bull moose lies in the sage, taking a rare but much needed break during the rut. The rutting season for moose, elk and most ungulates is in Autumn, and is a profoundly taxing time for the males as they battle for dominance and mating. The prime breeding bulls take little time out for sleeping and eating, often failing to build enough fat stores for the brutal winter fast approaching. But the strategy works – even if they fail to survive Winter, they will have successfully passed on their genes.