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.
When knocking pteranodons out, be sure to have a bola, it doesn't take many tranq arrows to knock it out. Once it is down, put spike walls up around it (with a little space so you can go in and out) so it doesn't lose taming efficiency or die.
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!
Be sure you whistle (follow) when riding your tame. If you accedntly jump off or get saddle jacked off your bird, he will follow you to the ground and you will have a better chance to recover your tame.