My favorite drive in Yellowstone is through the Lamar Valley, where you always have a good chance of seeing wildlife. With our ranger son-in-law as chauffeur and tour guide, we were able to see elk, deer, buffalo, and WOLVES! Wolf observers with their long scopes were grouped in pullouts along the highway, as a group of five wolves (part of a pack of eleven) were being observed making their way down a hillside maybe a quarter of a mile away. My photos are not really blogworthy, but watching the wolves cavort in the snow was definitely the wildlife highlight of my trip.
We did have an up close encounter with two buffalo along the road (not an uncommon occurrence), and I thought this snow-covered face would be a good photo of the day.
f/5, 1/160, ISO 200, 86mm
melinda anderson photography 
Wow! This is fabulous. Great capture. I am impressed.
Oh, give me a home where the buffalo roam…….