To kill pretty much anything on these birds, tame a high level, then pump stam to 3k, then the remainder in melee. Barrel roll into alphas etc. But keep eye on Stam. Never regen Stan on ground, know your ledges!
Many people say highlands on ragnarok is the best way to go but valguero is definitely underrated, way more ovis and pteranodon spawns then ragnarok. The edge between chalk cliffs and the starter spawns is the best place to go for sure.