Do not fight these things on a thyla! When they do their roar it will make your thyla just run uncontrollably!! I'm not sure if this on other Dino's, it doesn't do it with wyverns or bears for sure though! Only thylas that I know of.
No offense mobile players, but it's really annoying to try to look for helpful information, and be flooded with that, "please put it on mobile". They took it out probably because of lag, so, just please, stop spamming this stuff.
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.