In Yellowstone, the elk migrate to warmer pastures ahead of what is sure to be a cold winter.
But bighorn sheep are far more resilient, remaining on the mountains other species have abandoned, and battling each other for mating rights.
In Yellowstone, the elk migrate to warmer pastures ahead of what is sure to be a cold winter.
But bighorn sheep are far more resilient, remaining on the mountains other species have abandoned, and battling each other for mating rights.