Get yourself a flock of these guys amd make sure they are bred and fully imprinted as well. Well they don't have to be bred but just wont be as good. Trust me on this. These guys are amazing as a flock. Watching them devour everything is amazing. Get tbese guys to as much health as possible and you'll be able to tear through alpha Raptors and Carnos with ease. Trust me
Everyone seems to limit this to just being a "scout". If you get a high level (170+) the terror bird can easily be one of the most deadly mounts out there. It's speed is unmatched and its ability to glide from any height, if it has the stamina that is, makes it amazing. If you pump HP, speed, stamina, and later on movement speed, you will have an absolute killer. (WARNING: Even high level terror birds will have low weight, only bring your essentials to maximize on speed!)
Perfect mount to explore on the ground. Everyone uses a ptera to get around the map, but on the ground it's a whole different experience. Also this mount is my go to for cave exploring. 300+damage and 180+movement speed is a must.
The Terror Bird is a great scout. It's high speed and ability to glide makes it useful for escaping other predators. However, it does have pretty low weight, and sometimes low health, so I would level up its weight capacity and it's health. ( But that's for the Terror Birds I found, as they had low weight and slightly low health. If you find ones that are better, mine might be weak or a lower level, so do as you want! I hope this info was a bit helpful :D )
It is pretty much a raptor that can glide through the air. The thing is that it isn't an early tame, which is why it is less useful. Since it's a harder tame than a raptor, you can better tame a carno at that point.
These make decent scouting mounts. They're relatively quick & their ability to glide by holding the jump button can get you out of some sticky situations that wouldn't be possible on a raptor (jumping from a cliff to escape predators). I suggest leveling in Health, Stamina, & Melee (Movement Speed as needed).