EASIEST WAY TO TAME AT ANY LEVEL:
Stock up on trans, 4 - 5 per bird, wait for it to land, walk an aim-able distance away, FIRE AWAY, when it comes close, run towards it while flanking from the side and from behind as it passes, you WILL take a foot or two, so be prepared to have SOME food handy for yourself.
They stay tranqed for a little over 30 minutes. Use that time to starve them whil you hunt some predator or big game to get some prime and VOILA!
I solo play and just tamed 5 Argen in one go. I am going to paint them blue and call them The Blue Angles. 😉
Catch them in an argentavis trap. Get a magnifying glass. Shoot them with narc arrows until it is just about to go unconscious (Use the magnifying glass to inspect the torpor) feed the argentavis a body. Imediately after it consumes the body shoot it with narc arrows to finish knocking it out (*if it does not have the green effect around it's head do not knock it out! If the effect is gone feed it another body) Purpose when the argentavis gets knocked out with the effect his hunger will already by very low. Super fast taming!
If you are willing to tame an Argentavis do not keep on shooting it with darts or tranqs otherwise it will die. So shoot it and wait about 5 seconds before shooting it again to prevent it from dying. Do not tame an Argentavis on Carnivore Island as it will get eaten.
If you have one of these get a raft, build a taming pen on top and a space for landing and you have yourself a good portable taming base for anything it can pick up. I've tamed loads with this. It's easier than flying all the way to base or making several taming pens at different locations.
Use stone dino gate and 3 or more then 1 gate and 3 stone fence support one side the gate and the other the fence supports then u and your pt can walk or fly through the fence supports and the Rg can not then will the Rg is ago on the pt u can walk arund and close the gate and trap him or her for an easy tame
Everyone says you need an argy trap to knock one out but they aren’t actually that fast in the wild, yesterday i tamed a lvl 120 without a trap but I would recommend having at least 150% movement speed just to be safe.
There are ALOT of argies on Dead Island (aka Carno Island) it’s practically overopulated with them! But be careful, carno island is very dangerous, so you might wanna bring a quetz or something to carry them to a safer area
If u r a ok tribe just have something with about 2.5k health (depending on the lvl or the argy) sit is a area then let the argy attack it while shooting it this is your best bet if u dont have a cage. I did this with a 150 argen.
If you find one and you have a quetz with a platform saddle, Put the quetz on passive and start shooting the argie. At some point it will fly off and if it is high enough fly below it and shoot it 1-2 times and try to catch it if done right you can takes your tame anywhere!
I always find the easiest way to k.o them is pulling them to the top of the volcano and running towards its feet fired darts or arrows. At the top when they attempt to run away they don't really fly up.