Easiest way to tame: make a dino pen, pick one up with an argy, put it in the dino pen then follow along with a basic taming process (knock it out, feed it). Make sure you have lots of narcotics on you!
Best thing about them: they can climb up really steep hills and they can potentially do lots of damage and can be fast.
Where to find: most commonly found on trees (they will be hanging upside down, high up on large trees) in the redwood forest areas (mainly on The Center) or I find lots of them in the Ragnorok desert.

Very good tame! They're like pet tigers.

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.

Fly around on an argie while holding a parasaur on turret mode, the parasaur will sense it but make sure the thylacoleo can't reach you by flying high above so it hits the parasaur rather than you.

It says like 800 narcotic I used 30 for a 140 don’t believe the nacotics needed 100%

They prefer cooked meat over raw. Don't waste your precious raw mutton, better cook it, as it tames faster and with higher efficiency.