A bird feeder is provided having a seed reservoir with aside wall that has at least one seed access opening and anadjustable feed port assembly. The feed port assembly includes abase mounted to the side wall in a fixed relationship thereto andhaving a central opening in communication with the seed in thereservoir. Fitted to the base is a rotatable insert having a perchcoupled thereto in fixed relationship so that the perch and insertrotate as a unit. The insert is rotatable between two positions,an upright position in which the perch is below the base centralopening enabling birds to feed while standing on the perch, and anupside down position in which the perch is above the base centralopening, requiring birds to hang upside down from the perch tofeed.