Use a Argentavis scan your surroundings to find a nest with a baby and parent and bring as much fertilized eggs as you can and a cryopod. Make sure your a good distance away when dropping eggs scatter them across each other then fly off a few distance away and watch the parent slowly leave the nest then get off your bird and hide in nest and start the taming process you must copy what the baby does when 3 prompts come up you must choose the one the baby does make sure you do it quick or youll miss your opportunity to. do this until finished taming if parent comes back hop out the nest and back onto your bird and drop more eggs. Note you wont have to do this if your taming a low level since high levels require more eggs other than that use a cryopod and fly away