On the island map they are uncommon spawns in many places although the best place to find them is in the south east jungle and obelisk area. They can be used to tame solo tame a quetzal. Kill a few ducks to get some ghille (2-3 pieces will do) then shoot it in the head and afterwards just hit it with a few body shot and it’s will ko. Never go to close on your mount when you find one. Flying mount reccomended. if it is in the air follow it from far away and wait patiently for it to come down. If it only ascends then don’t bother and if it’s on the ground land a little far away then equip ghille and shoot. I hope this helped!