A bird feeder concentrates birds in one place, which is exactly why it needs to be clean. Dirty feeders and damp, moldy seed can spread diseases and expose birds to toxins. The good news is that a short, regular routine prevents most problems. This guide covers cleaning, storage and seed choice.
Why hygiene matters
Birds crowd at feeders and leave droppings on perches and ports. Several diseases spread this way, including salmonellosis, trichomonosis and house finch eye disease, which causes swollen, crusty eyes. Mold on damp seed can also be harmful. You cannot eliminate every risk, but you can reduce it a lot with clean equipment and fresh food.
A simple cleaning routine
- Frequency. Clean tube and hopper feeders about every two weeks. Clean tray and platform feeders more often, since they are exposed. Clean immediately after wet weather or if you see sick birds.
- Disassemble. Empty the feeder and take it apart.
- Scrub. Use hot, soapy water and a brush that reaches the ports and corners.
- Disinfect. A commonly used approach is to soak for a few minutes in a solution of about one part household bleach to nine parts water, or in white vinegar and water. Rinse extremely well.
- Dry fully. Let the feeder air dry completely, because wet seed spoils fast.
- Refill with fresh seed, only as much as birds will eat in a few days.
Wear gloves, clean outdoors if you can, and wash your hands afterward. Avoid cleaning feeders in the kitchen sink you use for food.
Under the feeder
Hulls and spilled seed collect on the ground. Rake or sweep them up regularly, because moldy seed and droppings attract rodents and spread disease. Moving feeders to a different spot every so often can also help. Platform feeders with a mesh bottom shed water and debris.
Storing seed
Keep seed in a cool, dry place in a metal or heavy plastic container with a tight lid. This keeps out moisture, insects and rodents. Buy only what you will use within a month or two, especially in summer, when oils in seeds such as sunflower can go rancid. Discard seed that smells musty or looks clumped or discolored.
Choosing seed
| Seed | Attracts | Notes |
|---|---|---|
| Black-oil sunflower | Cardinals, chickadees, finches, nuthatches, titmice, grosbeaks | High fat, thin shell, the best all-around choice |
| Sunflower chips (hulled) | Many songbirds | Less mess, but spoils faster; good for small portions |
| Safflower | Cardinals, chickadees, doves, grosbeaks | Squirrels often like it less |
| Nyjer (thistle) | American goldfinch, pine siskin, house finch | Needs a feeder with tiny ports |
| White proso millet | Sparrows, juncos, doves, towhees | Best on the ground or on a tray |
| Cracked corn | Doves, jays, quail, juncos | Also draws squirrels, blackbirds and starlings |
| Peanuts (unsalted) | Jays, woodpeckers, titmice, chickadees | Offer in a mesh feeder or shelled; never salted |
| Suet | Woodpeckers, nuthatches, chickadees | Best in cooler weather; see suet feeders |
Mixes can be convenient, but bags heavy in milo, wheat or red millet often end up on the ground because many songbirds do not eat them. A mix that is mostly sunflower, with some millet and safflower, wastes less.
Reading your feeder
The birds you want tell you what to offer. If you see mostly house sparrows and starlings, switch from mixed seed to black-oil sunflower or safflower in a tube feeder. If you want more goldfinches, add nyjer. If doves and juncos feed on the ground, add a tray. If squirrels dominate, consult our baffle guide.
Signs of sick birds
Watch for birds that are fluffed up, lethargic, easy to approach, have swollen or crusty eyes or tumor-like growths, or birds found dead near the feeder. If you see this:
- Take feeders down for a couple of weeks, and clean everything thoroughly.
- Wash your hands and avoid handling birds with bare hands.
- Report unusual illness or die-offs to your state wildlife agency.
During outbreaks of avian influenza, some agencies recommend pausing feeding for a time, so check current guidance from your state wildlife agency or the U.S. Fish and Wildlife Service.
Windows, cats and other hazards
Place feeders either very close to a window, around 3 feet or less, or well away, about 30 feet or more, so birds do not hit the glass at speed. Keep cats indoors, because outdoor and feral cats kill very large numbers of birds. Keep feeders out of reach of predators, and offer cover nearby.
Do birds need feeders?
No. Wild birds do not depend on feeders and find most of their food in the wild. Feeders mostly benefit people. If you stop feeding, birds will move on. If you feed, keep it clean and consistent.
Frequently asked questions
How often should I clean my bird feeder?
Every couple of weeks as a baseline, and more often after rain or in hot weather. Trays need more frequent cleaning.
Is bleach safe for feeders?
Diluted bleach, about one part to nine parts water, is commonly used if you rinse thoroughly and let the feeder dry fully. Vinegar is a gentler alternative.
What is the best seed for beginners?
Black-oil sunflower seed in a tube or hopper feeder.
What should I do with moldy seed?
Throw it away, clean the feeder and wash your hands.
When should I stop feeding birds?
If you see sick birds, or if your state wildlife agency issues a disease advisory, take feeders down for a couple of weeks and clean them.
