Here’s how I did it.
Step 1. Find low lvl Kapro
Step 2. Run at Kapro
Step 3. Punch Kapro til it faints
Step 4. Shove boa meat down it’s throat
This method worked twice for me, with a lvl 1 and a lvl 3. If you’re going for a high lvl, a crap load a health will see that this method still works
If your on the island go to the east side of the map. Go to the edge of the swamp and make a trap, even a two by two thatch one will work. Put door frames on the edges of the foundations, then finally a ramp for it to walk up on. You can also use this as a safety area to knock it out from. Vote ^ so others can see!!
Dont listen to all that get someone to pick you up
And stand on a tall rock crap just hop into the swamp with a cross bow or a normal bow let it grab you and then just shoot tranqs down its throat and murder any narcos with a trike and you have your self a kapri btw you can usually get away with this strategy with lvl 1 to 80ish but anything higher you may die btw have a decent amount of health so it does not just chomp you in 5 seconds
Swamps are crazy places to go, gotta be crazy to go there, but I did, wanted to find a Kappa to replace the one that got eating by a Thermo. Second time looking for one and finding only Sarcos so I decide to finally tame one, get one down and tame underway and a Baryonyx shows up, had only just been researching it the nigbt before as my next tame so tackle him get it down and tame underway, then a Kappa bowls me over, struggling now but finally get him down and tame. Walked out of the swamp with the three, that was enough for the morning.
If you have high health and or armor whistle your mount passive first. Then use a spy glass to look for the one you wish to tame. Make sure there are no other Kapros around. If there are snipe them dead then allow the Kapro that you want to tame to knock your off your mount, make sure your mount is following you, and begin shooti n g it with tranq darts or arrows until its asleep then put prime meat in its inventory or mitten.
This will only work if, 1, the kaprosuchus is low level, 2,you are a high level, so when the kaprosuchus grabs you, punch it out, it works, make sure you aren’t near any mean creatures, or it will die, hope you can do it!