Do not, I repeat DO NOT try to take this on without the proper tools. I couldn’t defeat on for a long time, and it rips things apart. My thatch base was gone in second. The two good things to know are the range of awareness(how close you have to be before it sees you) is very low. I had to get right up in its face before it attacked. This allows you to go around them easily. Secondly, do not attack without a longneck rifle or better. The only reason I took it out was because I had a longneck rifle with a scope to get two good headshots, and a mastercraft sword to finish the job. It hurt me a lot, and I barely made it out alive. This was on casual mind you. So again, do not engage without much preparation or you will regret it. If your lucky you can outrun it and retreat to your metal base. If your base isn’t metal though it will tear through it. Thatch stands 1 hit, 2 if your lucky. Wood will last maybe 4 at the most, and Stone can last 10 if your lucky. But it will not last forever.

I really overkilled this thing once. I spotted it when on my pteranodon and then decided to snipe it. I forgot how fast this thing was, and only got it twice before jumping on to my pteranadon and leading it off the cliff. Needless to say, it didn't stand a chance agaisnt my two diplodocus, five trikes, anky, raptor, dilo and three dimorphons.

I once had about 5 raptor around level 30. We where all chillen as a pack, and then this thez came outta now where and brutally killed my pack while I managed to escape with my life. I vowed to get revenge, so I tamed 10 more raptors, and a Carno (named derp) and we marched right on up to dat fet thez and attacked. I ended up losing 3 raptors but Derp and the rest of the crew survived. DO NOT go anywhere near a thez unless have a army of raptors and a loyal Carno. Rip my first pack

Try and get this thing with some tranq arrows, a crossbow and from a far distance on a elevated surface taller than it. A raptor helped me do this by running and jumping on top of the hill. Then I proceeded to shoot the tranq arrows at the theri. It ran away but it ran back. Just because it retreats doesn’t mean it’s safe to chase it. I kept the high ground until it was knocked out and fed it lemons and used a soothing balm.

i rode my ptera to take it down using "hit and run" method: use ptera's bite attack then quickly fly away to prevent getting hit, then turn around and repeat (probably works for other flying dinos as well + make sure u have plenty of raw meat on u to feed your ptera in case it's health takes a hit)

I don’t know if I’m crazy but I was riding my dinosaur and I saw 2 or 3 dilophosourus killing this and this monster was runing away from the dilos also tip KEEP IT AWAY FROM YOUR BASE AND YOU DINOS this beast was so close to my base I thought all of my Dino’s would die and I think I had all my Dino’s on netural