Extremely difficult to tame. Best options are to bola it, and then use a longneck rifle with tranq darts. Otherwise trying to get it to fly into the side of a cliff and get stuff is the other option for a solo tame.

Do not leave it uprotected it has extremely low health after you knock it out.

After you've knocked it out just tame a moment to appreciate its beautiful colo....OH SHIT ITS ESCAPING!

Ghillie suit and you should be able to slowly walk right up to it. Hit with a bola and tranq arrow or tranq dart it to the face. Easy down if you use ghillie suit and a bola.

Since the new update, rare flowers make dinos aggro on to you, you can use this on a tapejara and it will follow you to a trap you've built. Just remember that each flower gives only 10 seconds of that debuff so if the bird is far away from your trap, you have to use it frequently while coming back. Also, if you need it to follow you after you've gotten off your dino, you need to eat another rare flower so that it can agro on to you once again.