When flying in redwood be aware that one may be hiding behind a tree. Best way if you're not using a trap or pen is to scout ahead of time and tranq on the ground then use flyer to gain distance. Find a vantage point and keep shooting it till it goes into flee mode. Once at that stage you can either wait till it returns or chase it with tranqs. Once downed use the starving method and focus on keeping it's torpor up. Once the appropriate amount of food has decreased use cooked prime, lamb or normal meat (COOKED). It should be a breeze from there. Once finished use the argy or quetz to carry it back to base, going on foot is suicide
The redwoods are now basically a no fly zone, I lost a quetz, and a pter to these bastards. They jump out of the tree, rip you off your mount, and then pin you and your mastercraft armor to the ground and murder you.