You can find these near the red ob go there and you’ll see a whole army( not really you get the point..)! Good luck on taming one.. you’ll need it. Anyways you’ll need like 10 Tranq arrows if the first 2 don’t work they usually do. If high lvl use Narcotics or Biotoxin, bio toxin is recommended but it doesn't matter. If it’s a low level use Narcoberries or narcotics. Biotoxin or Narcotics are recommended but it doesn’t matter. Now before you tranq it kill all the highly threatening Dino's in the area then in 8-15 minutes you got yourself a Stegosaurus! 😄 😝