Bison Grunting Close-up Picture

Yes, I was in an SUV for this close-up. Bison are noisy with their deep grunts. This bull was tending a cow in Hayden Valley in Yellowstone National Park. At times, herds of these massive animals could number 800 (only a guess) or more and could be seen as far as the valley was visible.
Camera and Lens Settings
500mm  f/4.0  1/160s
ISO 400
4992 x 3328px
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