Mating season, also known as the “rut”, for Big horn sheep usually takes place between November and December each year. During this time males will compete for the females in a mating competition which involves two males running towards each other and banging heads/horns. The males can reach speeds over 60 km/h when they collide, and the sound of their horns hitting can sometimes be heard as far as 1.5km away.
In this photograph, not only were the two males charging at each other and butting heads, but they were doing it on a pretty shear cliff face, which makes their actions even more remarkable.
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Taken: December 25, 2015
Location: Yellowstone National Park
Camera: Canon EOS-1D X
Lens: Canon EF100-400mm f/4.5-5.6L IS II USM
Focal Length: 188mm