So let me tell you a little story so I had a quest telling me to tame a quetzal
And I was a good level for the saddle but boy was I not thinking I had argent with me and my grapple and was ready but the quetzal I was taming got away and then my argent was stuck in the air he could follow because I had him not to follow me and then I wanted to come back for him/or her I don’t remember but when I came back........it was gone
So... I figured out the exact spots for the spawns 👍 The primary spot is just behind the red obelisk on the thin little strip of land near the southern island. (I almost always see one spawn there) I also find them frequently spawning around the “back spike” of the red obelisk. You will almost always find a quetz around these two places. (At least on mobile) If you want a high level, just kill the one that spawns at these two places and a new one will always respawn back at those two places. This technique worked for me.