Do hummingbirds prefer nectar made from purified water over nectar made from ordinary tap water?
Tip: Make two batches of nectar, one using purified water and one using tap water. Use two identical feeders placed at the same location, just a few feet apart, each with a different batch of nectar. (Be sure to label them.) Record daily observations. Reverse the feeders and keep recording. Compare results with those at Natural Instinct (click on Hummingbird).
