75 lat 75 long spawnpoint on SE. Although I had trouble taming there because of lack of good rocks to hide on as they can climb most of them, also because my argentavis killed the only rex I could make unconscious as it was trying to hit a pulmonoscorpious..
Carea more about big prey than you, so try to run past anything bigger and meatier than you, then keep running. It won't take long to kill whatever it finds. That being said, I did see a Rex take a long while to kill 2 carbonenemy turtles