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.
This tip is only if you already have a quetzal available. The easiest way to tame a quetz, is to build a quetz catcher. You can make it out of thatch and its hands down the best tactic. A lot of YouTube videos available on how to build one. Knock it out in the catcher, and you don't have to worry about it getting hit.
A lot of quetzals spawn at red and if you are looking for a high level, kill the low levels and leave a certain distance. repeat until you find what you are looking for! Use a catcher, it makes it a million times easier!
For solo tame grapple your argie then instead of having to mess with attack and passive use the follow my target button and just aim for the quetz this will take a long time but no damage will be done to the quetz by your argie
For someone who doesn't already have a Quetz, the best way to tame it is to have a buddy pick you up on either a high stamina Ptera or fast Argent and wait to line up the tranq shot against it's head. Ideally the more of these the better but don't be waiting too long for a good shot otherwise the torpor will quickly go down. When you think you're close to finishing make sure the last few are shot when it's not above water so it doesn't drown, then finish with either a circle of spike walls or some kind of box for protection.
Tame it using a tapi. Get on the front seat, then set your tapi to attack a creature on the ground. Before it attacks the creature, whistle go here toward the Quetzal. From there you can just continue to follow the Quetzal by typing go here while you're tranking it.
Quetzals are one of the most useful dinos in ark. But when trying to tame one dont lead it through the redwood, me and my buddy were taming one and it flew through there. Long story short we got ambushed by a thyla and we lost all our taming gear and a high level argentavis
To solo KO this dino, jump off your bird with grapple equipped, grapple onto your bird then whistle it to attack the quetz, when you are near, whistle 'stop all'. Switch to tranq darts and shoot, rinse and repeat... gl!