Dude you do realise how stupid you sound right now. Its a pelican yes but a prehistoric pelican at that so I dont get your arguement of the game not having prehistoric creatures, its literally riddled with them.
Also the devs have never lied to us, they have always told if something would be added heck the eurypterid was announced back in like september, way before its dossier came out. The gorgonopsid may be the same or its development lead to purrlovia.