Watch for bison on roadways near Yellowstone National Park
Keep your eyes peeled for bison (buffalo) when you drive around Yellowstone National Park. Bison do get out of the park, despite attempts to keep them contained, and they are very difficult to see on the road. This is especially true at night, because their eyes do not reflect like deer in your headlights, and they have such dark hair.
I would recommend driving slower than you normally might, just to be safe!!
This article is a reminder what can happen if and when a vehicle hits a bison:
Warmest Wishes from Big Sky Country,
Montana Vacation Blog