Can someone please tell if these are on the island on mobile? Anyways I think that ark should add it cuz I want one so badly!
Tropeognathus
The Tropeognathus is a rideable flying pterosaur. While they are not the fastest flyers, they have excellent stamina and are great for transportation. Its beak allows surviors to "recycle" items and gear to their base components.

How to survive, fight, and kill a wild Tropeognathus, from players who have done it.