Bees and wasps at nectar feeders

The short answer

• Saucer feeders solve this by geometry. Nectar sits in a basin below the ports, out of reach of a honey bee's roughly 6 mm tongue but easy for a hummingbird whose tongue extends well past a 15 to 20 mm bill.
• Do not fill a saucer feeder to the brim. Filling to about two thirds keeps the nectar surface below the ports, which is the whole reason the design works.
• Diluting the nectar does not deter insects and does hurt hummingbirds. Bees and wasps happily take sugar water far weaker than 4:1, and sugar costs pennies, so there is nothing to gain. Keep it at 4:1 with no dye.
• Yellowjackets get worse in late summer. Colonies switch to seeking carbohydrate in August and September, so a feeder that was fine in June can be swarmed in September without anything changing at your end.
• Never use insecticide, oil or any sticky product on or near a nectar feeder. If a colony fixates, take the feeder down for two or three days instead.

Most advice on this problem is a list of tricks. It is actually one measurement.

A honey bee's tongue is about 6 mm long. A Ruby-throated Hummingbird has a bill of roughly 15 to 20 mm and a tongue that extends well beyond the tip of it, giving a working reach of 30 mm or more. Put the nectar surface somewhere between those two numbers and the insects are excluded by physics, permanently, with no maintenance and nothing added to the feeder.

That is what a saucer feeder does. Everything else on this page is either a way of getting the same result on a feeder you already own, or a way of avoiding making things worse.

Identify the insect before you plan anything#

The right response is different for each of these, so spend thirty seconds looking.

Honey bees are a recruitment problem: break the recruitment and they go. Yellowjackets are a seasonal calendar problem: understand the calendar and you know when it ends. Paper wasps usually resolve themselves once the nectar is out of reach.

Port design, and the reach test#

Here is the mechanism in full.

Inverted bottle feeders hold nectar in a reservoir above the ports, held up by a partial vacuum. The liquid sits right at the port opening and is frequently pushed slightly proud of it when the trapped air warms in the sun. From an insect's point of view this is an open dish of sugar syrup. It is also why the same design leaks and attracts ants; one design flaw, two pest problems.

Saucer feeders hold nectar in a shallow basin and the ports are holes in the lid above it. The liquid surface sits some millimetres below the port. A hummingbird hovers, inserts its bill, extends its tongue and reaches it easily. A bee lands on the port, reaches down 6 mm, finds nothing and leaves.

If you own an inverted bottle feeder and like it, you are not stuck. Bee guards, shade and a clean exterior will get you most of the way. But if you are choosing, the trade-offs are laid out in saucer versus inverted hummingbird feeders, and for insects the verdict is not close.

Bee guards, and when they make things worse#

A bee guard is a plastic mesh or slotted cap that fits over a port. The slots let a bill and tongue through and block an insect body. On a well-made feeder they work.

Three ways they go wrong:

• They are yellow. Yellow is a strong visual attractant for bees and wasps, which is precisely the wrong signal at a feeder port. Some feeders have yellow guards and yellow molded flowers by default. Swap them for red equivalents if replacements exist for your feeder, or choose a feeder without yellow accents next time. This is also a reason not to add anything yellow near the feeder, including yellow wasp traps hung too close.
• They are on the wrong feeder. On an inverted bottle, nectar is pressed against the back of the guard, so a wasp working at the mesh can still reach liquid. A guard is a supplement to correct geometry, not a replacement for it.
• They are never cleaned. Guards have crevices, and crevices hold sugar. A sticky guard is an insect attractant in its own right and a mold site. Take them off and wash them at every refill, which on the cleaning routine nectar requires is on the temperature schedule in how to clean a bird feeder.

Perch design plays a small part too. Feeders with a broad flat landing ring give wasps a comfortable place to work at the port. A design with no perch, or a narrow one, makes the insects hover, which they do badly.

Nectar strength: leave it at 4:1#

Two pieces of advice circulate here and both are wrong.

"Water it down so the insects lose interest." Bees and wasps forage on flower nectar that is usually far weaker than 4:1 sugar water. A diluted feeder is still an excellent find for them. What dilution does change is the value to the birds.

Prices are 2026 United States big-bag benchmarks used as defaults in our seed cost calculator. Swap in your own and the ranking can change; the edible fraction and energy columns will not.

At 4:1 the solution runs about 68 kcal per 100 g. Move to 6:1 and you have cut the energy density by roughly a third, so every visit a hummingbird makes returns a third less for the same flight cost. And look at the price column: nectar works out at about 16 cents per pound of finished solution, so the sugar you would be saving is worth almost nothing. You would be degrading the food to save pennies and not deterring a single wasp.

"Make it stronger so it is too thick for insects." Also no. Insects take stronger solutions than 4:1 readily, and heavier syrup is harder on the birds. The nectar recipe is four parts water to one part plain white sugar, no dye, no honey, no brown sugar and no sweetener, and there is no insect situation that justifies changing it. If you want the exact batch for your feeder volume, the nectar calculator will size it.

Spills, shade and the sticky pole#

Insects find a feeder by smell and by sight, and both are amplified by mess.

• Wipe the outside at every refill. Hummingbirds flick nectar around the ports as they feed and a thin sugar film builds up in a couple of days. That film is what a foraging wasp lands on first.
• Wash the pole and hook. A sticky hanger holds scent and is a landing strip.
• Clear what is underneath. A patio slab with dried nectar on it keeps the site attractive even after the feeder is clean. Hose it.
• Find the drip. A feeder that leaks is feeding insects continuously. Diagnose it with the shade-then-sun test on the ants page, because thermal expansion in a bottle feeder is the usual cause.
• Put it in shade for the afternoon. Shade reduces drip, slows fermentation and lowers the scent plume. Morning sun with afternoon shade is the best compromise, and it also extends how long the nectar stays good in summer heat.

Moving it, and the three-day removal#

Insects navigate to a fixed point with more precision than they re-acquire a moved one. Hummingbirds are the opposite: they scan, and they relocate a feeder within hours.

So the cheapest intervention available is to move the feeder 3 to 6 ft. Not across the yard, just off the exact spot. Bees and wasps arriving on the old coordinates mill around and leave. Hummingbirds find it the same day. Repeat every three or four days if the insects re-locate it, and rotate between two or three hanging points.

If a honey bee colony has genuinely fixated, escalate to removal. Take the feeder down entirely for two or three days. Foragers report back that the source is gone, the colony reallocates them, and the pressure usually collapses. Hummingbirds are not harmed by a short gap: they feed on flowers and insects and use feeders as a supplement, which is covered in hummingbird feeder timing. Rehang a clean saucer feeder, filled two thirds, with no yellow on it.

Decoy feeders, a shallow dish of weaker sugar water placed 20 ft or more away, get recommended a lot. They work sometimes for honey bees and rarely for yellowjackets, and there is a real risk you are simply running a second wasp station. Try it only after the geometry, the cleanliness and the relocation have all been done properly.

Never spray anything#

Insecticide has no place at a nectar feeding station. Not on the feeder, not on the pole, not on the hook, not on the branch it hangs from, and not on the ground below.

Hummingbirds are not living on sugar alone. Small insects and spiders supply their protein, and they take them from the same vegetation and the same air space you would be treating. A spray that clears the wasps also clears the bird's food supply, and residue on the feeder or the hanger reaches the bird directly. The same rules that apply to oil, grease and sticky bands for ants apply here: anything a bird can contact or ingest is out.

If you have a yellowjacket nest that is genuinely a safety problem, treat that as a separate job at the nest site, keep it well away from the feeding area, and take the feeder down until the work is finished and the area has been rinsed.

The long-term version of this is a yard with real flowers in it. A garden with native nectar plants and layered cover spreads the birds and the insects across dozens of sources instead of concentrating both on one plastic cup, and it is the only fix on this page that gets better every year.

Frequently asked questions#

Why do saucer feeders keep bees away?

Reach. A saucer feeder holds nectar in a shallow basin underneath the feeding ports, so the liquid surface sits below the opening. A honey bee's tongue is around 6 mm and cannot bridge that gap. A hummingbird's tongue extends well beyond a bill that is already 15 to 20 mm long, so it reaches the nectar without effort. An inverted bottle feeder holds nectar right at the port and often pushes a little out, which puts it directly in reach of any insect that lands.

Does watering down the nectar keep bees off?

No, and it costs the birds. Insects take flower nectar far weaker than 4:1 sugar water, so a diluted feeder is still worth their time. Meanwhile the hummingbirds get less energy per visit: going from 4:1 to 6:1 drops the energy density of the solution by roughly a third. Since sugar for nectar works out at around 16 cents per pound of finished solution in our food table, you are saving almost nothing and giving away a third of the value. Keep it at 4:1.

Do bee guards actually work?

Good ones do. A bee guard is a mesh or slotted cap over the port that lets a slender bill and tongue through but physically blocks an insect body. They work best on saucer feeders where they add a second barrier to one that already works. They fail in three ways: yellow guards attract the very insects you are excluding, guards on an inverted feeder still have nectar pressed against them from behind, and any guard traps sugar in its crevices and becomes sticky if it is not washed at every refill.

Why are there suddenly wasps in September when there were none in June?

Yellowjacket colonies grow all summer and then change diet. Through the season, workers hunt insects to feed larvae and are rewarded with a sugary secretion in return. In late summer the queen stops laying, the larvae disappear, and that sugar supply vanishes. The workers then go looking for carbohydrate anywhere they can find it, which is why picnics, fallen fruit and nectar feeders all get busy at the same time in August and September. It ends with the first hard frosts.

Can I spray the wasps around my feeder?

No. Do not use insecticide on the feeder, the pole, the hook, the hanging branch or the ground beneath. Residue reaches the nectar and hummingbirds take small insects and spiders for protein, so you are contaminating both their drink and their food. If wasps are genuinely dangerous, for example an underground yellowjacket nest by a path, that is a separate pest control job to handle away from the feeding area, and the feeder should come down while it happens.

Should I kill honey bees at my feeder?

No. Honey bees are not aggressive at a feeder, they do not defend it, and they are pollinators worth keeping. What they do is recruit: one forager finds the feeder and recruits from the nest, and by afternoon there is a crowd. The way to break that is to remove the resource for two or three days. The colony reassigns those foragers to other sources and does not usually come back. Rehang with a saucer feeder, no yellow parts and a clean exterior.

Sources and further reading

1. Ruby-throated Hummingbird life history Cornell Lab of Ornithology, All About Birds Bill and tongue morphology, nectar and insect diet
2. Feeding birds Cornell Lab of Ornithology, Project FeederWatch Nectar ratio and hummingbird feeder practice
3. Pest notes: home and landscape University of California Statewide IPM Program Yellowjacket colony cycle and late-season sugar seeking
4. Attracting birds National Audubon Society General guidance on feeders and garden chemicals