A tip for beginners:
If you attack these guys with your dinosaur be warned...
Even during riding your Mount, they will kill you first, not your dinosaur…
And they do tons of damage and are not that easy to hit with smaller dinosaurs (small hitbox)
Try to avoid them early game
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.
When in areas that have many dimorphadon remember to be careful and not to hit one by accident when fighting other creatures as you can easily be overwhelmed.your mount will not be able to save you as they deal damage directly to the rider.
Whatever you do, DO NOT piss these things off when you have low level dinos. You accidentally hit one while attacking something else, and 6 more will pop out of nowhere, and swarm you-killing 2 mid level pteranodons, your FIRST 2 EVER Argies, and leaving you 300 metal and crystal in the negative.
I laugh when I read about people freaking out over dimorphodons on mobile because they accidentally stepped on one and have 25+ of them come after them. I have stepped on these buggers so many times I lost count. However there is a way to live if you do step on one and a swarm comes for you. All you need to do is have a large such as a therizinosaurs,bronto,rex,giga,etc. Stay in one place preferably on a rock or such where you have higher ground. Then just start attacking them continuously without moving from that spot. You will begin to see their bodies shoot off like baseballs. This is the fun lovable sport called dimorph ball.
When attacking one, all dimprpodons in the area will attack you along with the one you attacked. When this happens, it is best to just take a weapon such as a pike and repeatedly stab the air. You will hit them as they fly by to attack you. Also, be careful even when you are on a mounted dino. They can attack the player while it is still on the dino, and can kill you. This happened to me as well; even though I was on a rex, a swarm of dimorphodons killed me while I was on the saddle. Luckily I was close to my base so I could just respawn and get my stuff back. However, you should still be careful about accidentally attacking on of these. Others can come out of seemingly nowhere.