I had spent an afternoon looking for an American Dipper (also known as the Water Ouzel) in Yosemite National Park, without success earlier this year.  In Yellowstone, I saw one on my first hike, without even trying! 

The bird, which fishes in mountain streams, was the subject of a chapter in John Meir’s The Mountains of California.  John Heir’s writings helped create Yosemite National Park.