A hummingbird feeder includes a base tray having an upwardly-opening interior for holding food which is attractive to fruit flies and further includes an upper tray which is positionable upon the base tray in a nested relationship and which includes an upwardly-opening interior for holding food, such as nectar, which is attractive to hummingbirds. A top cover for covering the upper tray includes a first aperture through which a fruit fly can exit the base tray and a second aperture through which a hummingbird can access the food of the upper tray. A passageway network extends between the interior of the base tray and the first aperture, and a closure assembly enables a user to selectively shut off or open communication between the interior of the base tray and the first aperture.