First there was one howl out in the trees somewhere, soon there was a chorus of many singers. This coyote answered and howled with the best of them.
Yellowstone's hills are cut and painted by the centuries of volcanic activity going on underneath the rock. The red is an iron deposit left by the boiling waters pushed up through the rock.
Cattle ranchers raise their herds close to the park. When the bison population swells these ranchers have problems and consequently so do the bison.