All you really need to tame these guys is:

1.) A shelf in an island or mountain or wherever you find one

2.) A LOT of tranq darts/arrows

3.) LOTS of narcoberries/narcotics

4.) A decent amount of meat/kibble

First get on the cliff

Then lure it to the base of the cliff

Blow all your tranquilizers until it goes to sleep eventually

Fly down and put food and narcoberries/narcotics in its inventory

Wait, occasionally force feeding narcotics/narcoberries

🚨NOTE: THIS GUY LOSES TORPOR FAST, BE CAREFUL AND MAKE SURE YOU HAVE ENOUGH MATERIAL TO KEEP THIS GUY UNCONSCIOUS LONG ENOUGH!🚨