Does Red Food Coloring Harm Hummingbirds - The red dye commonly used in nectar for backyard feeders is. Web image via alex wilke / shutterstock. Web while there is currently no definitive proof that red food coloring is harmful to hummingbirds, it is important to consider.
Web while there is currently no definitive proof that red food coloring is harmful to hummingbirds, it is important to consider. The red dye commonly used in nectar for backyard feeders is. Web image via alex wilke / shutterstock.