Many commercial hummingbird nectars, both powdered mixes and liquid concentrates, include red dye. Because hummingbirds are attracted to red, the dye is useful as a sales point for backyard birding consumers, and red nectar stands out on store shelves more effectively than clear bottles.

Is the red nectar bad for hummingbirds?

It's true that no solid research yet exists to prove that red dye is harmful to hummingbirds. ... But all hummingbird feeders have red parts that serve to attract the birds, so the dye is unnecessary at best, and potentially harmful at worst. Artificial nectars have little if any added nutritional value over sugar water.

Why should you use red dye in hummingbird food?

Manufacturers put red dye in hummingbird food for two reasons: Hummingbirds have learned to associate food with the color, and the red coloring helps you keep track of how much nectar is in the feeder.