The Redwoods on the Center is the best place to find high level Carnos. Most of them are in the upper 90s, with the exception of a few level 45s.
Carlos are really great all around if you can get past their horrendous stamina recovery
Me: let’s go get some fish!
Me: sees spino.
Me: oh no! Goes the other way.
Caro: zooms in from nowhere.
Carno: is speed.
Diplodocus: AAAAAAAAAAAAAAAAAAAAA CARNO FIGHT ME INSTEAD
me: thank you massive dino.
One morning when I woke up (in the game), there was a level 150 Alpha Carno standing just outside my base, it just ran through my defense, as was it nothing) and killed half of all my animals inclusive my lvl 192 raptor, these bastards will destroy you. A tip for other unlucky players, lure them away from your base, if possible.