After Tammy and I watched Old Faithful erupt, we hiked a five mile trail that explored Upper and Midway Geyser Basin. This trail was a mixture of gravel path and boardwalk that takes you past the myriad geothermal features in the area. This was an other-worldly place that smelled of hydrogen sulfide, was clouded by waves of steam, and was a confusing mix of warm wet air and cold dry air. In the middle of all of that, however, there were animals living out their lives, apparently ignorant of, or adjusted to, the volcanic workings of the area.
The first picture is of a Mountain Bluebird. These were fairly common, and their behaviors reminded me of the Eastern Bluebird that I am more familiar with. The second picture is of an Osprey eating a fish (I am assuming it is trout) while steam from some geothermal feature wafts by in the background. And the third picture is another American Bison, this one crossing Firehole River. The "rock wall" in the upper left corner of this picture is the outer wall of Riverside Geyser.