| Mountain goat at Glacier National Park, Montana. | 1999 |
| Mountain goat at Glacier National Park, Montana. | 1999 |
| Mountain goats at Glacier National Park, Montana. | 1999 |
| Mountain goats at Glacier National Park, Montana. | 1999 |
| Mountain goat at Glacier National Park, Montana. | 1999 |
| Mountain goats at Glacier National Park, Montana. | 1999 |
| Mountain goat at Glacier National Park, Montana. | 1999 |
| Golden mantled ground squirrel at Rocky Mountain National Park, Colorado. | 1999 |
| Golden mantled ground squirrel at Rocky Mountain National Park, Colorado. | 1999 |
| Golden mantled ground squirrel at Rocky Mountain National Park, Colorado. | 1999 |
| Golden mantled ground squirrel at Rocky Mountain National Park, Colorado. | 1999 |
| Golden mantled ground squirrel at Rocky Mountain National Park, Colorado. | 1999 |
| Prairie dog at Devil's Tower National Monument, Wyoming. | 1999 |
| Prairie dogs at Devil's Tower National Monument, Wyoming. | 1999 |
| Prairie dog at Devil's Tower National Monument, Wyoming. | 1999 |
| Prairie dog at Devil's Tower National Monument, Wyoming. | 1999 |
| Prairie dog at Devil's Tower National Monument, Wyoming. | 1999 |
| Prairie dog at Devil's Tower National Monument, Wyoming. | 1999 |
| Deer at Mesa Verde National Park, Colorado. | 1999 |
| Bull elk at Rocky Mountain National Park, Colorado. | 1999 |
| Elk at Rocky Mountain National Park, Colorado. | 1999 |
| Sea lions on the California coast. | 1999 |
| Bison at Yellowstone National Park, Wyoming. | 1999 |
| Bull elk at Yellowstone National Park, Wyoming. | 1999 |