Solo players. Best way to tame this beast is to get a Griffin on Rag by making a trap with stone Dino gate, pillars and stone ceiling. Use a ptera to kite it into the box, dismount and shut the door behind you then knock it out with tranqs. Farm mutton from the nearby Highlands to tame.
You can use the Griffin and shoot whilst flying it
The fun way is to jump off and grapple to your argie and whistle it to attack and since argies are slow it won’t catch up in time so tranq till it goes out also bring parachutes and consider liking so more people will know
If you drop a quetzal due to knockout, and it lands next to a giga...just know, the quetzal belong to the giga. Now you get to watch your would be quetzal get eaten by a giga. Now you can go home and cry.