On Ragnarok it's way easier to spot them in the Desert area instead of the Redwoods. Just pick one up with your Wyvern/Argy/Quetz and bring him to your stone/wood taming pen. He won't climb out of it and he can't fit through doorways.
I was searching for hours in Redwoods but found 5 in 30 mins in the Desert. (It's the middle south part of the Desert)
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.