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.
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.
Fly on an argie around the branch lines of the trees (where the leaves and branches end and the tall part of the tree begins). Look for the bouncing kitties or listen for their roar. When you spot one, fly just above their body and hug the tree so they cant jump you. Pluck them from the tree, and carry them off to tame in a pen!