i just tamed a level 300 on fjordur. no idea what the max level is for these guys but thats the highest i got. it ended up being a lvl450 in the end. i recomend going to lost island and getting a sinomacrops. makes it way easier. grapples work too but i prefer to fly easier. i have the tek helmet and it helped a lot. you can see the agro and where they are. when you track them, the tracking bar dissapears after you use element.
hope this helps a little, just what i experienced in my taming.
This little monsters spawn ( lost island) at the aberration/artifact of the strong cave, not sure if they can be tamed as I have not tried it yet, the cave is at the north of the island behind a waterfall, coordinates on gps being 26.6 54.5
For me this thing in cute form almost looks like Jerboa, if he eats element and you are low lvl. Turn around and RUN AS FAST AS YOUR LEGS CAN GO (Or jump onto parasaur or galimimus) Otherwise this creature is super cool.