BS439 (Sam Parks Photography) Tags: montana northamerica oviscanadensis rockies rockymountainbighornsheep rockymountains usa unitedstatesofamerica animal autumn biggame bovid bovidae bovine breedingseason fall herbivore hoof hoofedmammal hooved hooves horns large lipcurl male mammal mating meadow mountainous naturalworld nature ram rut rutting trophyram ungulate valley