Bison rut, Yellowstone

Recorded by National Park Service.

Male bison "bellow" in order to announce their presence and establish dominance in a herd. During the mating season or "rut," bellowing becomes more prevalent, creating a signature sound of midsummer in Yellowstone.

Part of the Yellowstone project - see www.citiesandmemory.com/yellowstone for more.

Photo by Chloe Leis on Unsplash