Ron Fredrick:
Lamar Valley, after a late-season snowfall the previous day and into the night.
Ron Fredrick:
"Wolf Watchers" at Slough Creek in Yellowstone National Park
Ron Fredrick:
It's Bison (Bison bison) siesta time and four bison calves are out for the count.
Ron Fredrick:
Far from the NE Entrance road, Yellowstone's Lamar Valley Grey Wolf (Canis lupus) pack harasses five bison (Bison bison) they managed to separate from the rest of the herd
Ron Fredrick:
Yellowstone's Lamar Valley Grey Wolf (Canis lupus) pack approaches small herd of bison (Bison bison)
Ron Fredrick:
Yellowstone's Lamar Valley Grey Wolves (Canis lupus)
Ron Fredrick:
Two Grey Wolves (Canis lupus) at Yellowstone
Ron Fredrick:
An American Bison (Bison bison) Bull prompts a hasty retreat
Ron Fredrick:
American Bison (Bison bison) calf and mother
Ron Fredrick:
Rocky Mountain Bighorn Sheep (Ovis canadensis)
Ron Fredrick:
Mountain Bluebird(Sialia currucoides) in Yellowstone National Park, WY, USA
Ron Fredrick:
Mountain Bluebird(Sialia currucoides) in Yellowstone National Park, WY, USA
Ron Fredrick:
Mountain Bluebird(Sialia currucoides) in Yellowstone National Park, WY, USA
Ron Fredrick:
An American bison (Bison bison) pauses in moving snow aside to get at the vegetation underneath