Category:Travel and Places
Subcategory:North America
Subcategory Detail:United States of America
Keywords:2012, May, Memorial Day Weekend, Mud Volcano, National Park, Spring, Yellowstone, antler, bear, bears, black bear, boar, bull, calf, cinnamon black bear, cow elk, elk, elk, grizzly, landscapes, mating grizzly bears, newborn calf, sow, velvet