If in the redwood biome run to one of the small streams they glitch and don't register as water for you but it does for the terror bird so you can go prone in those streams and the terror bird will lose agro works for carno to.
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.
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.
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 )
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).
I hate them with a passion like no other. Fast, travel in groups, very aggressive and strong attack means these things won't hesitate to make a meal out of you. All over SE and heavily concentrated in the Red Forest on The Center. If you can outrun them, (higher level = faster bird) best thing to do before you run out of stamina is introduce them to their oversized cousin the paracer. Stand by it's legs and let the bird try to attack you. I will accidentally bite the Paracer and make it angry. Immediately move out of the paracer's legs and run forward then across the path of the paracer again as the bird won't de-agro off you till it takes damage from the Paracer. If the paracer is anymore than 20 levels below the bird, or if the bird has friends, run like hell! If not, wait and the Paracer will kill it for free meat and hide and often some items, as they carry them usually. Same idea works with wolves, cats, etc. You can also run them into other defensive dinos or their fav snacks!