When they are not stampeding after me I have observed these monsters using their massive heads to bludgeon rocks and fight amongst themselves. How can they expend so much energy on fruitless activity? Are they merely trying to keep from freezing?
The Bighorn Bison is an enemy that can spawn on the Ancient Valley and Magma Barracks maps. The bison attacks by making a roaring sound, before teleporting a short distance, stopping at terrain, edges, and characters, dealing damage to the latter.
Avoid simply tanking them unless you have multiple defensive items to withstand the charge. The Bison deals large amounts of damage and quickly, which can wrack up if you aren't careful.
Due to Bighorn Bison not being able to jump, one can trap them at a ledge and safely shoot at them with a ranged character. Due to the charge not being able to cross a ledge, a ranged character can also stand on a platform of the same height and shoot at it unharmed. Standing at a lower point than the Bison and jumping while attacking is also effective, however take care as at close ranges the Bison can still hit you.
If one must take on a Bison without trapping it at a ledge either because it is Frenzied or spawned at what would be the high ground, use invulnerability moves, a Hopoo Feather, or a Photon Jetpack to avoid its attack. The charge does have a cooldown, so try and hit it after it finishes charging. If it is Frenzied try and focus it down or move vertically in the map to de-aggro it.
The Bighorn Bison bears a resemblance to the Pokemon Tauros.