A removable bird cup feeder assembly is comprised of a dish holder and a cup shaped dish. The dish holder has a slide rail, a vertical stop member, a horizontal stop member and a cage displacement member. The slide rail fits into a tunnel formed on the dish by a flange and a wall of the dish. The stop members limit horizontal and vertical movement of the dish. The fit between the flange and the slide rail limits rotation of the dish. The dish has an embossed floor, radiused floor and wall intersections, and radiused top wall surfaces to enhance bird comfort and to facilitate cleaning of the dish. The assembly is installed within a cage. When the cage door is opened, the dish may be quickly removed and replaced. When the cage door is closed the dish cannot be displaced by a bird within the cage.