Sunrise over the Yellowstone River (Image YS-1)
Pronghorn buck surveys the Lamar Valley, Yellowstone (Image YS-2)
Aspens highlight lodgepole pine forest, Lamar Valley, Yellowstone (Image YS-3)
Bison bull, giving me the stink eye, Lamar Valley, Yellowstone (Image YS-4)
A favorite Yellowstone species, the Pika, Sheepeater's Cliff, Yellowstone (Image YS-5)
"Bobby socks" forest, Geyser Basin, Yellowstone (Image YS-6)
Raging bull, Yellowstone (Image YS-7)
Bighorn ewe and kid, Calcite Springs, Yellowstone (Image YS-8)
Bison bull, Lamar Valley, Yellowstone (Image YS-9)
Young elk bull at sunrise, Yellowstone (Image YS-10)
Bighorn kid, Calcite Springs, Yellowstone (Image YS-11)
Badger, Trout Lake, Yellowstone (Image YS-12)
Bison bull, Yellowstone (Image YS-13)
Young bighorn buck, Calcite Springs, Yellowstone (Image YS-14)
Elk bull bugling to his harem, Mammoth Hot Springs, Yellowstone (Image YS-15)
Bull elk, Gardiner, Montana (Image YS-16)
Bighorn ewe, Calcite Springs, Yellowstone (Image YS-17)
Grand Prismatic Springs, Yellowstone (Image YS-18)
Lamar Valley sunrise, Yellowstone (Image YS-19)
Lamar River sunrise, Yellowstone (Image YS-20)
Pronghorn buck, Lamar Valley, Yellowstone (Image YS-21)
Tundra swans at dawn on the Yellowstone River, Yellowstone (Image YS-22)
Tom Miner Basin, Gardiner, Montana (Image YS-23)
Cabin in Tom Miner Basin, Montana (Image YS-24)
Upper Falls, Yellowstone National Park (Image YS-25)