If you are on a wyvern and you hear or see one of these about to pounce you, fly directly up and press the grab button. If you time it right, you can grab the thylacoleo before it pounces you off. Upvote to let others know.
Thylacoleo
The Thylacoleo is a large, powerful mount that can climb up trees and pounce on its enemies.

Player-written tips for taming, using, and fighting the Thylacoleo in ARK: Survival Ascended & Evolved.
Basically just a upgraded dire wolf.It can climb it can rek a rex.RKO.Yeah I had my strongest dire wolf taken out by one of these.
You never see him coming
I use my Gigantopithecus when taming Thylacoleos. Let your Giganto tank the hits and you can shoot while mounted. I use shocking tranq darts and they knockout in no time.
Bear trap, tranq arrow, and cooked meat are what I found to be easiest
Just walk through the forest and look for any weird shape and shoot it with a shocking track dart
I look for these on Scortched earth or on the desert islands of Ragnarok. I don't even try at Redwoods, as this is the only place you'll find them hanging from the tree.
Dododex needs to update that it can be carried by the argentavis
To gain fantastic stats use s+ mod nanny I have gotten my thylos to 15k health and 211 damage I love thylos also they are called the marsupial lions
I don't recommend taming like 130-150 with even coocked prime cuz you will wrekt it's effectiveness and good lvls are very Rare...
Very good for solo - dou players very fast very aggressive if you get a good lvl
Make sure you bring +100 narcotics because I couldn’t even tame a lvl 5 with 100 narcotics
Now they can be caried by Argies, but they can attack the argy while in they are in the argy's talons , so don't hold them to much if you don't have enough health in your bird.
These things have absolutely RIDICULOUS amounts of stamina. Ridiculous. Level it a few times, and you'll be fine for any long distance travel. The rest of your points should go into melee dmg, health, or weight.
Pump points in speed and stamina and you’ll become untouchable
Flying sabertooth are a bit weird... once I saw it coming so was like OH SHIZ RUN and got my mount running really fast and thr kittydid a superman impression after me. If that happens, get a gun or a pike out and try to reason with it before it catches up to you and tried to…
Flying sabertooth are a bit weird... once I saw it coming so was like OH SHIZ RUN and got my mount running really fast and thr kittydid a superman impression after me. If that happens, get a gun or a pike out and try to reason with it before it catches up to you and tried to slice you into ribbons
If you fly by the redwoods on the island either fly a bit above the tree tops or a bit away from the edge of the forest. If they aren't on the ground they seem to prefer halfway up redwood tree trunks. I got jumped by 3 so far, the last time was while i was going to tame…
If you fly by the redwoods on the island either fly a bit above the tree tops or a bit away from the edge of the forest. If they aren't on the ground they seem to prefer halfway up redwood tree trunks. I got jumped by 3 so far, the last time was while i was going to tame one. DO NOT get close if you are on a tame, hop off, set a trap and have a bola ready. This things are glorious and fun as hell
Wear ghillie, they wont jump out at you. I pick up with quetz from trees without a problem.
These jumping sabors will jump off a tree and touch u in places you don't want. So be prepared to be walking in the redwoods and then OH SH:T WHAT JUST JUMPED AT ME
Best thing to do bring an Argy with a Direwolf and gather raw meat and put it on a camp fire and cook it because it is quicker with cooked meat