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Check the nectar first — cloudy, fizzy or more than three days old in hot weather explains most cases. Then check the recipe: it must be 4 parts water to 1 part plain white sugar, with no dye, honey or substitutes. If the feeder is fresh and correct, the likeliest remaining causes are a dominant bird monopolizing it, ants and wasps, or the normal midsummer lull when females are on nests.
Hummingbirds are fussier than seed-eaters and for good reason: sugar water goes off, and a bird that has been ill from a bad feeder does not come back to it. Most “they stopped coming” problems trace to the nectar, and most of the rest to how the feeder is set up rather than where it is.
Work through these in order rather than changing everything at once.
Check in this order
- Smell and look at the nectar. Cloudy, specked or fermented
- Check the recipe. 4:1, plain white sugar, nothing added
- Look for a bully. One bird chasing all others off
- Look for insects. Ants and wasps drive hummingbirds away entirely
- What month is it? Midsummer is genuinely quiet
- Is the feeder visible? They find food by sight
- Are there flowers blooming? A good bloom outcompetes a feeder
1. The nectar has gone off
The most common cause by a wide margin. Sugar water ferments and grows mold quickly, and it does it faster than most people expect.
Signs: cloudiness, black specks, stringy material, a slimy film inside the reservoir, or bubbles. Any of those means change it now.
The schedule that avoids the problem: every two days above 90°F, every three to four days in the 70s and 80s, every five to six days in cooler weather. Full sun shortens all of those.
Hummingbirds can detect spoiled nectar and will avoid a feeder that has had it. If yours went bad, expect a few days of continued absence after you fix it — the birds are not being stubborn, they have simply written the feeder off and need to rediscover it.
2. The recipe is wrong
Four parts water to one part plain white granulated sugar. That is the whole thing.
The additions that cause refusal or harm: honey ferments fast and supports a fatal fungal infection; brown, raw or organic sugar contains iron that hummingbirds cannot excrete well; artificial sweeteners contain no calories at all; red dye is unnecessary and unstudied at these volumes.
A mix that is too weak gives too little energy to be worth the trip. Too strong is harder to feed on. Full recipe and changing schedule.
3. One bird is chasing everyone off
Hummingbirds are strongly territorial around food. A single dominant male will often claim a feeder and spend the day driving off every other bird — so a yard that looks empty may actually have one bird in it and several more circling out of view.
The fix: two or three feeders, placed out of sight of one another. Around a corner, on opposite sides of the house, at different heights. A bird cannot defend what it cannot see, and the monopoly collapses. This is the single most effective change in this article.
Rufous Hummingbirds are especially aggressive for their size and will dominate a feeder against larger species. If you are in the West and one bird is running the place, this is very likely why.
4. Ants and wasps have taken over
Hummingbirds will abandon a feeder crawling with ants or surrounded by wasps.
Ants: an ant moat above the feeder ends it completely.
Wasps and bees: yellow parts attract them, so a feeder with red-only ports helps. Saucer designs help more, because the nectar sits below where a shorter tongue can reach it.
Never use oil, petroleum jelly or sticky barriers on the hanger or around the ports. It gets onto feathers, destroys their insulating and waterproofing properties, and can kill the bird. Cornell Lab warns against this explicitly. A water-filled ant moat does the same job with no risk.
Ant moats cost very little and solve the problem outright. The one drawback is that they need topping up — they evaporate fastest in exactly the hot weather when ants are worst, so check the water whenever you change the nectar.
5. It is midsummer
A predictable lull, usually from mid-June through July, that alarms people every year.
Females are incubating and brooding, which keeps them close to the nest and away from feeders. Meanwhile natural flowers are at their peak, so a feeder is one option among many rather than the best available.
It picks up sharply in late summer as juveniles fledge and fall migration begins — often the busiest few weeks of the whole season. Keep the feeder clean and stocked through the quiet spell.
6. The feeder is hard to see
Hummingbirds find food visually while moving through an area. A feeder tucked under a deep porch roof, hidden inside foliage, or against a wall the same color as the feeder is simply not being noticed.
Somewhere with clear sightlines from above, ideally near flowers they already visit. A hanging basket of something red and tubular next to the feeder is a reliable way to draw attention to it.
7. There is better food nearby
A neighbor with three feeders, or a heavy bloom of trumpet vine or bee balm along the road, will pull birds away temporarily. Nothing to fix — when the bloom passes, they come back.
8. Wrong time of year for your region
Worth ruling out before troubleshooting anything else. If it is late October in Minnesota, the hummingbirds have gone and no feeder change will help. Arrival and departure timing by region.
The checklist
In order
- Nectar cloudy, specked or over three days old in heat? → Change it, scrub the ports
- Recipe not exactly 4:1 plain white sugar? → Remake it
- One bird chasing all others? → Add a second feeder out of sight of the first
- Ants or wasps on the feeder? → Ant moat; check for yellow parts
- Mid-June to July? → Normal lull. Keep it clean and wait
- Feeder tucked away or hidden? → Move it somewhere visible from above
- Outside the season for your region? → Nothing wrong
Common questions
Why did my hummingbirds suddenly stop coming?
Most often the nectar spoiled. Change it, scrub the feeder including the ports, and expect a few days before they trust it again.
Why do I only ever see one hummingbird?
Almost certainly a dominant bird defending the feeder. Add a second and third feeder placed out of sight of each other and you will usually start seeing several.
Where did they go in July?
Nesting females stay near the nest, and wild flowers are at their peak. It is a normal midsummer lull that resolves in late summer when juveniles fledge and migration begins.
How do I get rid of the ants?
An ant moat — a small water-filled cup above the feeder. Never use oil or sticky substances anywhere on the feeder or hanger; they contaminate feathers and can be fatal.
Should I move the feeder if nothing is using it?
Only after ruling out the nectar and the recipe. If it has been correct and untouched for two weeks, one move to somewhere more visible from above is reasonable — then leave it there.
Do hummingbirds remember a bad feeder?
They appear to avoid feeders that have had spoiled nectar, and they show strong spatial memory for food sources generally. Fix the problem and expect a short delay rather than an instant return.
Related guides
- Hummingbird nectar recipe
- Best hummingbird feeders
- When to put out and take down hummingbird feeders
- How to attract hummingbirds
Sources: Cornell Lab of Ornithology, All About Birds hummingbird feeding and feeder pest guidance; Project FeederWatch, Feeding Birds; National Audubon Society; US Fish & Wildlife Service; eBird seasonal abundance data.
Setting up for hummingbirds?
A saucer feeder that dismantles fully is easier to keep clean than a larger bottle feeder, and cleaning matters far more than capacity. Look for no yellow parts, which draw wasps.
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