I think I found the way to actually get them to spawn so people are saying they spawn near the red obb almost every time I have tried to kill multiple creatures there a bunch of times and still no quetzel but I think I found the solution because I heard somebody say that there is a bug where they will only fly towards the redwoods so I think that they fly to the redwoods and I remember seeing one in the redwoods and disappearing never seeing it again but it's probably somewhere in the dense part of the redwoods so you need to do a Dino wipe if you cannot find one And then check the red obelisk (btw I have not tried this yet But it might be the solution) (oh and note I think 1-2 can exist on the map at a time and that's why you see another one here and there) (Another note I play on ark survival evolved for the Nintendo switch And I am playing on The Island) good luck:)