Winter in the Greater Yellowstone marries serene beauty and harsh realities in a way only an arctic like cold can. On some days you may be excused for mistakenly thinking you were located in the polar zone. Last January on my photography worksop we spent a day in the field with low temps reaching -40° F (40° C). Severe cold, blustering winds, and limited food resources present supreme challenges for wildlife to overcome. Nothing has kindled a deeper sense of respect for the fortitude and adaptability the inhabitants of this ecosystem posses than my time photographing them in the winter. The next series of posts over the coming days will highlight individual animals and their unique strategies for surviving, and even thriving in the gauntlet of winter.