American Bison: Lamar Valley, Yellowstone National Park, September 2024 — As I mentioned yesterday, the rut was really just about over when we visited Yellowstone in late September, early October, but evidently a few cows were still receptive. When there were any in a herd, it increased the overall activity in the herd enough to notice. And there was some of this pheromone sniffing going on. I thought we might get to see some actual mating…but no…not this day. Sony a6700 with Tamron 50-400 Di iii zoom at 600mm equivalent. Program mode with my bird and wildlife modifications. Processed in Photomator.