One of the most feared animals of ark, dangerously powerful and big. Be sure not to get too close with your tames because you make get stuck in its legs. A quetz with a pilot and 2 cannons would be the easiest way in my opinion to knock this out, but if it's too much you better be prepared with an animal on stand by because these things have a long agro range and will follow you.
Easily killable with a wyvern. Lightning and poison easiest down to longer range in attack. Just hover above and light it up :) killed my first today and it didn't touch me once. Just remember to watch stamina ;)