From the Wilderness gallery at CathySummers.com.

Photograph by Cathy Summers

20180922_067: Bison on a Gyser Basin Boardwalk Along the Firehole River: Yellowstone National Park
My Stars = 3

Camera: NIKON D850

1/250 sec. at f/5.6, ISO 400

100 mm (70.0-200.0 mm f/2.8)

More photos: like this in: