Yellow is a pterosaur (confirmed by the game files) inspired monster who has a brown vest, a Helicopter-propeller, and two eyes with two long arms that seem to look like wings. He has sharp teeth, and has a pointed tail in his back. When he walks, he will keep his arms close together and stand tall, but when chasing after a player, Yellow will flap his wings with the mouth open and lean forward. He is tamable, He is only able to be tamed after getting fed.