I was flying my pteranodon, and i saw a lvl 27 rex pick on one of these lil cuties. He curled up into a ball, and took no damage, so combined with its mining capabilities, this lil guy is perfect for the mountains, as they have incredible defense, and mining capabilities.
Lots of these spawn on fars peak. Best Dino in the game in terms of being a utility Dino. Paired with a beaver and you can build a giant base in hours instead of days. Highly recommend this for low and high leveled players. Weight boosting while it levels up!
I found that the best bet to take one down and tame is to run around in a 8 foot circle continuously shooting it in its feet and or head with a dart gun. Super easy and fast. By the end it'll ball up and you can then focus its under shell by aiming your shots. Narcotics are a must and so is dilo kibble.
Be careful on tranq dart/arrow usage, aim for the underbelly for maximum torpor effect. When it rolls up into a ball, attempt to shoot the underbelly again, and again, and again, so on. Found near Redwoods (Island) and great for obtaining rocks, and only rocks. Essential for constructing stone structures.
Used to have 3 of these; Mallet, Hammer and Sledge. They were killed by a former tribemate because we cuffed him but they got us a full circle of behemoth gates around a lake in 2 days, would recommend for any survivor building stone. Dont hit on the shell only takes a fraction of torpor.
Shoot for the head or tail with trans arrows and crossbow combo. When it rolls into a ball leave the area and keep an eye on them with a spy glass. Wait for it to start moving before approaching and shooting again. For high level ones, use a magnifying glass to check the torpor lvl while it's in ball form. Takes several rounds to get them knocked out. Don't waste your time trying to apply torpor while it's in a ball. Good luck.