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.
They spawn near green ob on island. On ragnarok they spawn on the outskirts of Viking bay, as well as over the plains outside of the dragon trench. On valguero they spawn pretty much everywhere you can find 2 or more recessed in one spot, or wherever Gigas spawn.
I’m a lvl 84 and I’ve only seen these guys about 7 times. I was on my Argy, higher than the tallest redwood tree and I seen them. Yes they like to fly high and they have been watching you tame that lvl 45 dilo.