Is the red dye that is found in premixed hummer solution bad for hummingbirds?
Though no conclusive scientific evidence exists showing harmful effects of red food dye on hummingbirds, this additive is certainly not necessary. Brightly colored flowers are nature’s way of attracting a foraging hummingbird. When they feed at a series of flowers, hummers are acting as pollinators. So the red solution in feeders is aimed at attracting hummingbirds as red flowers are. Bright red feeder parts or a bright red ribbon hung near the feeder can be just as attractive as red-dyed solution. In fact, even with no color at all, hummers will find the feeder. See more on Feeding.
