I have an eerie one and it is max lvl with 700% melee damage. Im not kidding, just upgrade these guys’s like 25% health and 75% melee and they are beasts. Mine also has 7500 health. It can take on a rex by its self without me controlling it and it will win.
I jumped off the bridge at the canyon on the Ragnarok Map with my max level terror bird on my friends account, he didn't know they could glide. So he jumped off with his max level Raptor when I did this to see me gliding. Long story short, he got pissed and named my Terror Bird Floaty Bird after cussing me out and falling into waters loaded with Spinos.