It isn’t really worth the tranqs and time unless you are playing with a bunch of friends and you need a transport with a large capacity. It’s so slow in the air that it isn’t THAT effective for a mobile base, but it works. You will want 1 for each biome in crystal isles, it takes half an hour to fly across the map.
Quetzals, one of the best dinos. Quetzals can easily be tamed with a buddy, all you need is a flying dino that can pick up people or has a multi-seat saddle. Load up with the appropriate tranq arrows, narcotics, food and set off across the map to find one. Low levels are brilliant for beginners as they can serve as brilliant carriers due to their high base weight stat. Higher levels however mainly are used as "Battle Quetzals", alongside the high stats it will receive from being tamed, pumping health and melee damage is the way to go. With that being said you'll be able to tank base defences such as PSX and Auto Turrets, aswell as kill dangerous dinos with ease. Maybe either of those don't tickle your fancy, then hey, make a "Party Quetzal"! Strap on some chairs, tables, food and lots more onto the Quetzal's Platform Saddle and hover in the air as you dance to Darude Sandstorm being blasted through someone's mic in game chat. If you can get a quetzal, do consider as they are brilliant!
When you tame your first quetzal, you should make it into a quetz trapper... if you are wanting more... if you don't know what a quetz trap is, go to YouTube! If you can tame a low level one to start! Being able to tame as many quetzals as you want with the trap, is RIDICULOUS!
Get a grappling hook and a flyer. Fly close enough to the quetzal, jump-off and shoot it with the hook then shoot it with any tranquilizing ammo you have (wait 5 seconds between each shot)
Also make sure your flyer is following you so when the quetzal gets knocked out you can hook onto him.