Just tamed one of these myself, after reading the story of Greg I decided there was only one name suitable for this creature. I love My Greg so much, he is amazing. Shortly after I tamed him I was out gathering with him perched on my shoulder when I was attacked by a group of compys, Greg instantly Launched himself off my shoulder and flew into the air with on in his Jaws while my raptor killed the other 2. I've never enjoyed watching something that has attacked me die so much.... Until a couple minutes later. A Dilo ran up and before it could even blind me Greg swooped in and grabbed him up in his Jaws flew into the air and tore him to shreds. 10/10 would tame a whole battalion of Greg's.
Also they are great for catching fish and taming otters.
To tame, just take a crossbow and some tranq arrows, shoot it, and give it some meat. After being tamed, it will sit on you shoulder. If you ever need fish, double tap Y and whistle attack a fish. It will bring you that fish with +100% quality than if you had killed it with a spear, and faster than fishing with a rod. Pesky when wild, but useful when tamed.
I had the pleasure of befriending one of these animals. Despite popular opinion, I find ichthyornis birds to be quite charming and graceful. So much that I found myself taming one. After he woke up, I saw a fire in Greg. From then on, we would be best friends. He’d come with me everywhere. From simple resource gathering to Bronto taming, Greg would be there supporting me from my shoulder. When I was too tired to go fishing or hunting, Greg was there to do it for me. He even makes the effort to make sure I get the best meat out of it. He is a quick learner, he went from from level 20 to level 40 in a day. Anywhere I go, he comes. Anything I need, he makes it his top priority. To this day, Greg continues to be my best friend and sometimes we just hang out on the beach or go fishing even when the resources aren’t needed. I thank Greg for his time with me and his endless favors that he has completed for me. Thank you, Greg.