3 ways to tame them:
1. Make a stone trap (foundstion, doorframe, ramp, etc.). Get a bird, fly the bird, drag a dodo or a person around and make them bait. Without killing anyone the terror bird will be chasing you while you're flying in the air. Lure it into trap.
2. If you don't have a bird, you can solo it or do it with a friend. Find a terror bird. Start running to the trap. (Probably will die so put a bed in trap and respawn then repeat till bird gets trapped).
3. Bola it, shoot fast, bola it again before it tries attacking you or running away, shoot at it again.
TAKES AWHILE FOR THEM TO GO UNCONCIOUS. I once made the mistake and kept shooting as it took about 20 minutes for it to go unconcious it died from me shooting it too much.
YOU WILL NEED LOTS NARCOTICS!!!!
Once I found one terror bird and once I defeated it 2 others were attacking my scorpion Micru and sadly....Micru died TwT pls like dis tip so I can find a new scorpian. Btw they eat meat,I was trying to feed it berries tho so feed dem meat.
BRING LOTS OF NARCOTICS. They literally lose half their unconscious state before they even start eating. I started to run out of narcotics so I filled up their unconcious bar and ran back to my house (which was really close by) to get more. By the time i got back it was long gone.
If you're on valguero, head into the redwoods on a wyvern (if you have one) and then pick one up, take it out the redwoods, put it on a piece of grassy land and the Bola it while on the wyverns back, then just tranq it! trust me, this is literally the easiest way to tame them lol