Argentavis's are better off fed prime meat or kibble. Do not a large majority listen to these people, they are somewhat wrong. Go on yt and build a taming cage. Stone gateway, reinforced gate, 6 ceiling, 6 foundation, 16 doorways, and thats all youll need for the cage. Any material. Use a tranq dart or arrow. Also pairing them with an Anky, u can get metal, obsidian and crystal easily. I recommend you use a PT. But for SE use a Kapro. With the Kapro lead it down a mountain and put it in the cage, someone or u close the gate. Then knock it out. Kill carnos for the prime meat, its easier than everything else besides kibble. Many people here are stating tips that have 0 logic and also are saying things that make it complicated. My guide is opinion wise better than many people here. Please /\ it if this helped a lot more than the others.