While driving through the mountains, I spotted a couple moose in the distance. They were grazing among the lupine wildflowers at the edge of the forest. Almost as soon as I pulled over, this cow jumped over the fence and crossed the road right behind me, followed by her calf. I was glad I had my camera ready with the telephoto lens attached. A moose on 4 legs is already the tallest mammal in North America. But judging by the fence posts, this moose was 8-9 feet tall standing on it's hind legs. The collar this cow is wearing is part of a 2-3 year moose ecology study by the University of Wyoming.