Very easy way to obtain one of these SOLO in mobile is to first build a large cage containing a revival platform (engram or tribute). Then take a fast flier with an attack/speed pteranodon following. When you find the quetzal you want, whistle the pteranodon to attack and kill the quetzal, then whistle back to neutral. Descend to the dead quetzal, retrieve its implant, and revive it at your platform for a very convenient tame. No need to fire even a single shot at it in the wild. Just be quick to retrieve its implant before something eats 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.