What I did is I went up to it and used my bola. It worked like a charm and hit it with my club. I once tried with a sling shot but it died so don’t do that. Takes berries pretty easy but be wary of titanaboas pretty deadly has a sarcoand pteradon protecting the tame.
FOR EARLY GAME
You will need:
Not to go into water
1. Go into a swamp
2. Wait until it’s alone, out of water, and not looking at you
3. Bola it from behind
4. Go ham with slingshot/arrows FROM BEHIND
5. Put a stack of 20 meat in its inventory as well as 5 narcotics
6. Keep an eye out
7. Make sure the purple meter stays in between the “S” and “C” in unconscious. If he goes below, force feed narcotics with RT, R2, or left clicking
9. Get a saddle and enjoy!!
In early game, you can try being on top of a rock or a stone building (lvl 20) so you don't get licked. You can either shoot rocks or tranq arrows (lvl 20). After some time, it'll try to run away. When it does, use a bola and knock it out.
Beware of: Kapros, Baryonyx
You'll need: a trap built in a safe location, a crossbow, grappling hooks
Taming: bring a dino you can shoot off the back of, shoot the frog with the grappling hook, drag it back to your trap
Tamed my self a wild 150 and all I did was get my bird the carry it to a little cage , stood on a rock and shot tranq arrows at it it took about 6 or 7 and I used quite a lot of narcotics and used raw meat...that’s it