While these things are op at destroying dinos, they can be countered by some creatures like stego, anky, and even a spinosaur, (You can only be on two legs to do any damage) I went on a killing spree in the swamp since I had just found out that everything ignores it and killed some dimorphs by accident, only to realize that you can destroy its friends too when they come for you.
Once I just tamed my max lvl Pteranodon and I then it happened one dimorphodon came out of know where I guess I hit it or something earlier and it swooped in and hit my brand new pteranodon and just like that they were attacking each other and they couldn’t hit each other in the air and they went so high I couldn’t recall it and just like that I never saw my Pteranodon again
I Spent ages farming with my Pteranodon but the one of these guys where sitting their so innocently so I hit it then all a sudden I see 15 or more of these dims and they killed my Pteranodon and I lost my loot ) :
I went to raid a base with 4 buddies, a rex, 3 carnos, and a bronto with a platform saddle and cannons. All we heard was a whistle and i swear about 50 of these little devil's swarmed the whole group, killing everyone in the group and one carno, the turrets shredded everything else, but the rex must have ran off and we never got a death message so its still out there in the jungle.