These assholes are the pinochle of pains in the neck. They knock you out, and their AI is so bad that they just run in circles around you instead of killing you and just knock you out again when you wake. Beware
Probably the most vile, evil, and sadistic being in ark. This ferocious little lizard will put you to sleep with its magic jump-and-toe-jab-venom. Once you are asleep, most Troodon will just dance around your unconscious body until you wake back up, only to knock you out again. These beasties are even worse when they travel in packs. Do yourself a favor and upgrade your armor and weapons (especially) asap. The faster you can kill them, the better.