Sunlight -------- Caged birds rarely receive enough sunlight and, therefore, rarely benefit from its ultraviolet radiation. Ultraviolet (UV) light is necessary to facilitate certain chemical reactions within the skin that in turn, enable optimal absorption of calcium (necessary for healthy muscles and bones) by the intestinal tract. There is no UV light benefit when sunlight is received through window glass. Consequently, you should take your bird outside on warm, sunny days as often as possible. Your bird's wings should be clipped, or the bird should be securely confined within a suitable cage. Make certain that neighborhood cats and wild birds are prevented access to your bird. It is also important for you to provide areas of sunlight and shade for your bird so that it can move into the shade if it becomes too warm. Many bird owners use artificial UV light sources to replace the regular incandescent and fluorescent lightbulbs in the rooms in which their birds are housed. The most popular and recommended light source of this type is the Vita-Lite (Duro-Lite Lamps, Duro-Test Corp., Lyndhurst, NJ 07071).