Always spawns with at least 3 Carnos and can buff them when hunting something or fighting you, if you have friends some people take out the carnos while 1 or 2 tranq it. If you don’t have friends kill the carnos first then tranq the yutyrannus,
It really is that simple though, they can't reach you or your flier on a big enough rock, so if you don't want to make a trap you can just shoot down from a rock or cliff once the carnos are dealt with. Be ready for a goose chase once it starts running.
Here’s a tip for early to mid gamers on Crystal Isles! If there is a Yuti, get a flyer, prolly a wyvern and lead it off a cliff, you can also kill off the Carno’s with its breath! Then use a Thyla and shoot it from whatever angle you can manage!
I was working on building my end-game base, when a 140 started stalking a little too close to my base. I funguses since my base was pretty big I could just shoot it from inside my base and it would be fine. I shot her until she started running, and for the next few hours I kept doing that until I got her into a ravine and she was knocked out in no time! I still have her, my first ever Yuti!