A nectar type bird feeder having an incorporated short-wavelength, ultraviolet light source adapted to illuminate the nectar contents and feeder internal surfaces. The ultraviolet light exposure functioning to significantly retard the growth of nectar spoiling micro-organisms and thereby to significantly extend the nectar freshness or service life. The ultraviolet light source may be built directly into the nectar feeder or configured as an add-on accessory. The preferred embodiment of the nectar feeder, ultraviolet light device will be solar powered and made to cycle on/off automatically. As hummingbirds are adapted to see UV-A light (300 nm-400 nm) the light source may be cycled on/off during the day to make the feeder visually conspicuous and thereby more attractive to the feeding birds.
