If your having trouble finding high level pteranodons, I'd suggest going to the redwoods and bring some spike walls just in case so you and the bird can't get attacked by terror birds or any other threats there.. for any level/easy tame, look around the 2 tropical islands, usually the only threats there are compys and dilos
When using tranq arrows shoot'em anywhere but the head. 3 arrows should KO them. I was taking a level 36 ptera. I recommend using kibble as raw meat takes a lot of time and narcotics. Don't try it if you don't have a trike or anything effective at gathering.
If flying/wandering: *various chirps and calls*
If startled by player (must be punched while wild to achieve this status): AHHH! (These lines are reused when leveling up)
If punched/hurt in any manner: ACH! ULGH-WUAGH! (Same lines as Coelacanth)
If killed or while unconscious/asleep: EEEEEEEEH! (Reused Coelacanth death-sounds)