Do hummingbird feeders have to be red?

The short version

Three claims, in order of how much they matter.

1. Red helps a hummingbird find a feeder it has not used before. Their color vision is weighted that way, and red flowers are reliably worth visiting.
2. After that, red stops being the deciding factor. They learn where food is and they prefer whichever source has the most nectar, red or not.
3. Red in the nectar is not needed and may be harmful. This is the one part of the question with a flat answer.

Everything below is the evidence for those three, and then what to actually buy.

What red actually does

Hummingbirds see the red end of the spectrum unusually well. Audubon describes oil droplets in the eye acting as filters that “appear to heighten color sensitivity in the red to yellow range, while muting colors such as blue.” And the association is learned against a real pattern: as Audubon puts it, “red flowers, and of course red feeders, are often rich sources of food for hummingbirds,” and the color “often signals high-octane fuel for their intensely active way of life.”

So red is a signal that has been reliable for a long time, and a bird arriving in a yard it does not know uses it. That is the honest case for red, and it is a real one. It is also narrower than the marketing implies.

Why it stops mattering after the first week

This is the part that most pages on this question leave out, and it is the reason the answer is “no” rather than “yes.”

The preference for red is not a hard rule the bird cannot override. Audubon reports that “by varying the nectar content of flowers, researchers were quickly able to switch hummers from a preference for red” to a preference for the most nectar-rich flowers, regardless of color — and sums it up as “it turns out that it’s the nectar, not the color that makes the most difference with hummingbirds.” They are, in Audubon’s phrase, “fast learners” that “will go to where the nourishment is.”

Put that together with what hummingbirds do in a yard. They are territorial, they return to known sources, and a dominant bird will sit and guard a feeder all season — the behavior behind how many feeders you need. A bird that has found your feeder is not re-evaluating its color each morning. It knows where the feeder is.

Which means the color of the feeder is a first-contact problem. It matters in the days after you hang something new, and in the spring when migrants arrive looking for anything at all. It does not matter for the rest of the season, and it is nowhere near as important as whether the nectar in it is fresh.

The one place red must never go

The nectar. This has a clear answer from both major authorities and it is the only part of this topic where we will be blunt.

Cornell’s All About Birds puts it as directly as it can: “There is absolutely no reason to add any red dyes to hummingbird sugar water. After all, natural flower nectar is clear, and hummingbird feeders have colorful parts that attract hummingbird regardless of the color of the sugar water.” Audubon’s nectar guidance says the same, warning against red food coloring as “not necessary and could also prove harmful to birds.”

Note the reasoning in the Cornell line, because it is exactly the argument of this page: the feeder already has colored parts, so the dye is solving a problem that the plastic flower on the port has already solved. The full treatment, including what to do about the supermarket bottles of red premixed nectar, is in is red dye bad for hummingbirds? — and the recipe you should use instead is in the nectar recipe: four parts water, one part plain white sugar, nothing else.

So how much red do you need?

Something at the ports. That is the practical answer, and almost every feeder sold already satisfies it.

Look at what the feeders on this site actually are. The Perky-Pet below is a glass bottle in a copper frame — and it has four red flower-shaped ports. The Aspects Gem is a clear basin with a red lid. The HummZinger range is largely clear polycarbonate with a colored cover. In each case the red is a small part of the object, positioned where the bird feeds, and that is sufficient.

If you genuinely have a feeder with no red on it at all — some antique glass and all-copper designs qualify — there are three fixes, in ascending order of how much we like them:

• Hang a red ant moat above it. Our favorite, because it does two useful jobs at once: the moat is the only thing that reliably stops ants, and the ones we recommend come in red. Covered in the best ant moats.
• Plant something red near it. Slower, free, and the better long-term answer for attracting birds in the first place.
• Tie a red ribbon to the hanger. It works and it looks like what it is. Take it off once birds are visiting.

What is not on that list: dyeing the nectar, and buying a second feeder purely because the first one is the wrong color.

The thing people are usually asking instead

Most people who ask whether a feeder has to be red are really asking why nothing is coming to theirs. Color is almost never the reason, and it is worth knowing the order of likelihood before you buy a redder feeder:

• Season and timing. If the birds have not arrived in your region yet, no feeder of any color will work. See when to put feeders out.
• The nectar has gone off. Cloudy or fermented nectar empties a yard fast and the feeder still looks fine from a window. See how long nectar lasts.
• Placement. Too exposed, too hidden, full afternoon sun, or no perch nearby. See where to hang a feeder.
• A dominant bird is guarding it. You may have one hummingbird, not none.
• Insects got there first. A feeder covered in bees is a feeder hummingbirds will abandon. See keeping bees off.

The full diagnostic, in order, is why hummingbirds are not coming to your feeder. Work through it before spending anything.

What we would buy

The honest recommendation is that you should not let this question drive the purchase at all. Choose the feeder on cleaning access and capacity, the way how to choose a hummingbird feeder sets out, and then check that it has red somewhere near the ports. It almost certainly will.

The picks below cover the three honest positions: the best feeder that answers the question by having red ports on a non-red body, the feeder we would buy irrespective of color, a deliberately non-red feeder to prove the point, and the cheapest way to add red to anything you already own.