Every time I visit Yellowstone National Park I am amazed and astonished by the gifts of land and skies. On this visit Wednesday, a "startle" of gray-crowned rosy-finches flew across the road, mountain bluebirds splashed blues all over the sage and tan grasses, bison ran in circles to stir up some mud for baths, pronghorn roamed the hills, a coyote hunted, white cloud tatters cast shadows on snow covered mountains and sandhill cranes preened by a pond