Wait till the ptery lands and bola it. Then shoot the ptery in the head with tranqs spread out 5 seconds apart (Mastercraft crossbow and above should only take 1 shot to the head). Build a spiked wall cage around the ptery (5 spiked walls will be enough). If you're on a mount and using kibble you can just park the mount in the cage and sit in the walls with it until it tames. Safest way to tame pterys without having to worry about wild dinos. Give it a try for yourself; good luck!

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