The instinct of the members of the bighorn sheep herd is pretty consistent.
Whether the herd is crossing the road in 1956:
Or the herd is crossing the road in 2014:
Or "Old Eighty" is looking down from her perch in 1956 (note broken horn):
Or, an anonymous queen of the desert looking for her king to mess around with:
***Vintage photos from Mountain Sheep: A Study in Behavior and Evolution (V. Geist 1971).