So u should have some grapples and tranq darts and spy glass. Jump off of bird and grapple on real quick. Then shoot the quetzal. Then tell ur bird to follow the quetzal since it flys away but don’t real in stay on ur bird grappled and then start shooting it again until all ur hard work pays off and it’s knocked out. Btw u need to use spy glass to tell ur bird to go at him from farther away.
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.
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.
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. Upvote if you agree.