It’s considerably easier to tame these guys in the desert as they spawn ‘on’ cliffs ,not attached, they prowl about like Sabertooth's, big strong nasty marsupials.
Taming only involves a large bear trap, tranq darts, a longneck rifle and cooked meat
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.
Shoot it out of its tree, then pick with argie and drop it into a trap/hole. Cook up some mutton beforehand.
Bred a slick navy blue and silver mutation.
Many surfaces are considered 'vertical' for it to climb, including the southern side of Volcano on The Island, from which you can then pounce back into the redwood, which is the biggest leap I've found yet