What an interesting feeder! When I have a feeder, I never add red food coloring to the water. Audobon says there’s no need for it. Evidently, the birds smell the nectar, so they don’t necessarily need to see it.
My sister, our friend and I used to watch birds when we were “little.” Happy days!
That is interesting, I had always heard that the first filling for each feeder used the red food color to help them find it...