If he's your first flier and you end up with an Argy or something else, don't give up on your boy the Ptera. He can serve as a good scout, because he is faster than the Argy, allowing you to make a much quicker getaway (level Stamina, like A LOT)
These things are OP they can demolish a giga just get a good mutation and try to uplevel the health , movement speed, and melee. It worked for me so try it and tell me how badly you fail or win
When leveled up, these guys are extremely helpful. I had a level 45 with 1000 health and I could take down rexes by just dive bombing them over and over.
Great bird I use mine for transportation and gathering metal since I don't have a Argy yet and I have gotten swarmed by argys and raptors on the island by volcano and he took care of them by the time I got back from my base with my lower level one.