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!!
This guy is my favourite so far, right from when I first meet him, I was a noob and wandered close to a swamp well he came flying at me missed and disappeared behind me, I'm like what the neck was that, climbed a big arse rock asap and looked around, bugger came bounding back towards me and leapt straight up that rock like it was a mole hill.
Tamed the bugger and took him hunting, came across my first raptor and shat myself thinking oh rap I am screwed, nope Kappa flys over my head, collects the raptor and pile drives it into the ground several meters away, hilarious. Always fun times with Kappa around.