If you're out on a bird and see one of these, don't do your usaul trick of flying up to it to investigate... your bird will lose its sh*t! By that a mean you will lose all control of it for x amount of time.
It's roar usually makes your dino scared and flees with you in no control. BUT I once have only been hit by a bit of the roar and only felt a bit scared and I was still I'm control. Proctodons, flyers, baryonyx is the best I suggest for escaping this wild beast. Goodluck survivors!
First day it was released, started a new character made a stone house boat and headed north. Was docked, taming a direwolf. Suddenly it drops from a cliff with 3 carnos. They surrounded my boat and wiped me in three minutes. If you see the buff, gtfo.