I hate these guys! There stamina is awful and so is there melee. Mine died to a low level wyvern when I tried to get eggs. He was over level 200. They are the easiest way to get a quetz though... 5 out of ten recommend cause they are the easiest way to get quetzals.
Wanna get Wyvern eggs? Use one of these with a whip and you'll get so many eggs you'll end up with so many omelettes that you don't know what to do with them
While diving pull up at the last second above your target and use main left click attack. Does a ton more dmg then just landing on target. Gives a nice speed boost too.