West and back: Animal spotting in Montana

We woke up in an average hotel in Hamilton, Montana and began our last leg towards Yellowstone. We followed the Bitterroot river for sometime in and out of the mountains until we were suddenly in grassland.  I screamed to a halt when I saw a large herd of deer-like creatures milling around to our left.  We later found out from a Yellowstone park ranger that these animals are the Pronghorn antelope in Montana.  We found them sporadically in Yellowstone National Park too, but never in the size of herd that we found them here.
As usual, Tim took this photograph of Max and I gaping at their sproingy, curious yet skittish behaviour.