I was out from 11 pm to about 1 am, so it isn’t just a matter of popping out for a few minutes after sunset. On the drive to the spots I saw plenty of bison, a few elk cows. When I was turning the truck around at the pullout where I took the Yellowstone Lake shots the headlights lit up 2 coyotes who were romping in the field. Didn’t get any shots of them. The night shot of the river shots quite a few stars reflected on the water, always interesting to see that.