To all of the ark newbies out there, YOU CAN TAME THIS ONE YOU HAVE CROSSBOWS AND TRANQ ARROWS!!! Since rexs are slow, you can run a good distance and bombard tranq arrows to its face. Feel like you want more of a challenge? Use it’s big Turning radius, it’s large enough for you to stay near its leg and not get bit, and it’s small enough to stay near its leg and not get bit. I knocked out a lvl 80 only using a crossbow and a lvl 10 pteranodon. If you are going to tame one, BRING TRANQ ARROWS! This thing takes a lot of tranqs to knock out and you can miss your shots (unless you have aimbot). Happy taming!