As someone who’s been watching these delightful little visitors in my backyard for years, I’ve learned that not all hummingbird feeders are created equal. While we have the best intentions when putting out these sugary stations, sometimes our efforts can actually cause problems for these tiny jewels of nature.

1. Your Nectar Has Turned Cloudy or Moldy

Several things can cause hummingbird nectar to spoil. The biggest culprits are molds, bacteria, and fungi.

You can often spot spoiled, moldy nectar with just a glance. The sugar water solution may turn cloudy, or you may notice mold or mildew growth at the feeder’s base.

Make sure your feeders are sparkling clean. During the summer, this might mean putting out a clean feeder every day.

Fresh sugar water solution spoils rapidly in the heat, causing mold and bacteria that can kill hummingbirds. If the nectar is cloudy, it’s spoiled–take it down immediately!

2. You’re Using the Wrong Sugar Ratio

The ratio of sugar to water for hummingbirds is one part sugar to four parts water. That’s ¼ cup of sugar to one cup of water in a homemade mix, or 80% water and 20% sucrose in a commercial mix.

Some people will mix a higher ratio of sugar into their water, mistakenly believing it will be sweeter and attract more hummingbirds. But this can actually make the nectar thicker, like a syrup.

Finally, consider your sugar-to-water ratio. Most hummingbird food recipes call for one part sugar to four parts water.

If your hummingbird food is short on sugar, it could be a less pleasant alternative to regular plants for your feathery backyard friends.

3. Your Feeder Has Bee Guards Missing

Bee guards that fit into the feeding ports of existing feeders can also be purchased. They are a small plastic mesh shape that fits in the opening of the feeder where the bird drinks.

The Hummingbird bill can fit through the mesh but the bee cannot get in. Unfortunately, bee guards donot fit all styles of feeders.

Purchase a hummingbird feeder that has bee guards in place. The Hummers are able to push their bill into the feeder port, but bees are unable to push in, to get at the syrup.

4. The Feeder Is Placed in Direct Sunlight

Hanging the feeder in direct sunlight can make it easier for the hummingbirds to spot, but it can also speed up the fermentation process. You don’t want the sugar solution to go bad too quickly, as it can be dangerous.

Don’t place your feeder in direct sunlight; the nectar solution will go bad faster. But don’t put them in dense shade either; it will be harder for the hummingbirds to spot the feeders that way.

5. Your Feeder Has Rusty or Dirty Ports

Those feeding ports need regular cleaning, just like the dishes in your kitchen. Rusty or dirty ports can harbor harmful bacteria and even cause infections in hummingbirds’ beaks.

I’ve found that a small bottle brush and a solution of one part white vinegar to four parts water works wonders for keeping these crucial parts clean and safe. (source)

6. You’re Using Red Dye or Food Coloring

You should also avoid using red food dye, as there are some concerns about the safety of red dye for the sensitive systems of tiny hummingbirds. The good news is that you don’t need red dye to attract hummingbirds to your feeders.

Some red elements on the feeder itself, such as red flowers, a red sugar water reservoir, or other red coloring, will attract hummingbirds just as easily as one filled with red dye. Finally, we don’t recommend using red food dye, as there are some suspected health risks.

It’s not worth the possibility of making a hummingbird sick, especially when they don’t need red food dye. A red feeder will attract them just fine.

7. The Feeder Is Too Close to Windows

Placing feeders too close to windows can lead to deadly collisions. These swift little birds can reach speeds of 30 mph, and window strikes are sadly common.

Either place your feeder less than 3 feet from the window (so they can’t build up speed) or more than 30 feet away to give them plenty of reaction time. (source)

8. Your Feeder Has Sharp Edges or Cracks

Next, you need to know whether the construction of the feeder can withstand wind, snow, ice, and extreme temperature changes it will be subjected to throughout the season. A feeder that splinters or cracks are no longer safe for the birds.

9. You’re Not Cleaning the Feeder Properly

Take the feeder apart to gain access to the different sections. Thoroughly clean each feeder part with hot tap water and a soapy solution.

Make sure that you use a natural, eco-friendly soap to avoid any potential harm to the environment or the birds. Then, use a ten-percent bleach solution (nine parts water to one part bleach).

Scrub the feeder with the solution for a couple of minutes (any longer is unnecessary) and rinse it off thoroughly to ensure no bleach is left over.

10. Your Feeder Is Overcrowded

If you have more than one hummingbird feeder, you should position them at least 15 feet apart, and ensure that they are not visible to one another. Hummingbirds are highly territorial.

One male hummingbird will keep all other males away from “his” feeder! Don’t place a single feeder with multiple ports, but rather more than one single port feeder.

Spread these out across your space and a single hummingbird will struggle to defend the whole territory. They will typically then give up and expend less energy on aggressive territorial behavior.

Hummingbird feeder harm checklist

What you see	Likely cause	What to do
Cloudy nectar or mold at the base	Molds, bacteria, and fungi	Take it down immediately
Syrup thicker than nectar	Too much sugar in the mix	Use 1 part sugar to 4 parts water
Bees in the ports	Missing bee guards or ports too large	Add mesh guards the bill can fit through
Nectar going bad in a day	Feeder in all-day sun	Move it; skip dense shade so they can still find it
Red-colored sugar water	Food dye in the nectar	Use a red feeder and skip the dye
Cracked or splintered housing	Weather has broken the feeder	Replace it; it is no longer safe
One male owns the yard	One multi-port feeder in one spot	Use single-port feeders at least 15 feet apart, out of sight
Need bleach leftover	Incomplete rinse after a 10 percent soak	Scrub a couple of minutes, then rinse thoroughly

Keep reading

• 9 Feeder Mistakes That Harm Hummingbirds
• 15 Mistakes That Are Wasting Your Hummingbird Feed Money
• 15 Mistakes Even Experienced Hummingbird Watchers Make