Bison Bull & Cow - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull & Cow - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Cow - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Cow - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull & Cow - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull & Cow - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull & Cow - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull & Cow - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull & Cow - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull & Cow - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull & Cow - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull & Cow - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull wallowing - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull wallowing - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull wallowing - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull wallowing - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Calves - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Calves - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Calves - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Calves - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Cow - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Cow - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison crossing Yellowstone River - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison crossing Yellowstone River - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison sparring - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Herd crossing Yellowstone River - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Herd crossing Yellowstone River - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Herd crossing Yellowstone River - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Herd crossing Yellowstone River - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison resting - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull wallowing - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull wallowing - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison in Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull wallowing - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull & Cow - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull & Cow - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull & Cow - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Calf nursing - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Cow and Calf - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Cow - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Cows sparring - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Slough Creek - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Slough Creek - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Slough Creek - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Slough Creek - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Slough Creek - Yellowstone National Park, WY (c) Jim Clark
Bison in early morning - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Slough Creek - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Slough Creek - Yellowstone National Park, WY (c) Jim Clark
Bison Herd in early morning - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Herd - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull - Hayden Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull dusting - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison herd and rainstorm in Lamar Valley - Yellowstone National Park WY (c) Jim Clark
Bison Bull Dusting - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull grazing - Lamar Valley - Yellowstone National Park, WY (c) Jim Clark
Bison Bull dusting - Hayden Valley - Yellowstone National Park WY (c) Jim Clark
Bison in Hayden Valley - Yellowstone National Park WY (c) Jim Clark
Bison herd in Lamar Valley - Yellowstone National Park WY (c) Jim Clark
Bison herd in Lamar Valley - Yellowstone National Park WY (c) Jim Clark
Bison herd in Lamar Valley - Yellowstone National Park WY (c) Jim Clark
Bison herd in Lamar Valley - Yellowstone National Park WY (c) Jim Clark
Bison herd in Hayden Valley - Yellowstone National Park WY (c) Jim Clark
Bison herd in Hayden Valley - Yellowstone National Park WY (c) Jim Clark
Bison herd in Hayden Valley - Yellowstone National Park WY (c) Jim Clark
Bison crossing the Yellowstone River in Hayden Valley - Yellowstone National Park WY (c) Jim Clark
Bison crossing the Yellowstone River in Hayden Valley - Yellowstone National Park WY (c) Jim Clark