They are great early tames, because they can carry over 500 pounds at level 60, they have a lot of steam, and they can pick up other small tames. They also have a smithy built into their saddle, allowing you to build and repair on the fly. The easiest way to tame takes 2 people, so I will describe that one first one person flies a pteranodon, while carrying another person in said pteranodon's talons. When you find an argy, get into its agro range. This is the hard part. The person being carried must shoot the argy, but can only do so without hitting the pteranodon when the pteranodon is flying straight up. The argy will follow the pteranodon straight up, and the person on the bottom can shoot it with a crossbow (seggested) or longneck or whatever. Argies usually com in twos, threes, or even fours, but this is an advantage to you. Kill the other argy/argies, and harvest them with your pteranodon. They will likely drop prime meat, and this will quickly tame the first argy. up 4 another.
1-2 tranq darts in head and he’s knocked, go get some meat and kill some of those jellyfish and get bio toxin then put the bio toxin in it and feed it until the argies hunger is on 1000 or less then put all your meat in it
Take a couple tranq arrows and hit it a couple times but be ready they attack
When it starts to fly away hit it a couple more times
Then put a couple meat stacks in the invo and bio toxin
Then you have a a Argentavis
(INSTANT TAME GUIDE)If you shoot tranq arrows, wait for it to flee and then give it a dead body to kill while it has high torpor. It will get rapid regeneration for 20 secs ( green essence on the head) if you knock it out while it has this green essence you can instant tame as the food is depleted instantly.
If you need an argy and don’t have time to tame one with a trap, just go to carno island, kill a Dino in front of an argy and let it harvest its body. When the green health icon shows up on top of it, knock it out with tranq arrows and the argy is instantly yours.