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.
In order to solo tame a quetz, you could use an argentavis and a pulmiscorpius. Just pick up the pulmiscorpius, and do whistle attack target while looking at the quetz, your pulmiscorpius should start attacking the quetz, raising it's torpidity until it is knocked out.
If you manage to knock a quetzal out, try starve taming. If you never tried starve taming it’s just leaving a Dino’s hunger go to half way or lower and then you start feeding. I’ve done this many times and it’s very useful taming trick.
So here is a story once on mobile I found one I am playing solo so I go and gear up for the tame it takes me from the swamp to the winter biome to the redwood to the north beach to the south beach back to the swamp I finally bring it down over the swamp instantly it gets attacked by a spino I am on a pterronadon I try to lead it away and I lost both my beloved pterronadon and the quezt so my tip be careful where you bring one down
To solo tame, grapple to an argentavis, and be ready to set your argentavis to passive and attack my target on command. Just maintain a process of having your argentavis chase the quetzal, when you get close enough set it passive, then fire a tranq dart/arrow. This is a long process, but it is by far the easiest way to solo tame, unless you already have a quetzal.
RARE FLOWERS DON’T WORK
1. Ride in the passenger seat of a Tapejara and whistle attack target. If it’s too fast, whistle passive, then repeat until it’s knocked out.
2. Use dodo arrows to lead it into a trap, then tranq it until it’s out.
3. Use an argy and grapple to it. Like the Tapejara, whistle attack target, then passive if it gets too close.