How to Keep Squirrels Off Your Bird Feeder: What Actually Works

Squirrels are not really a seed problem. They are a geometry problem. A gray squirrel that can reach your feeder will empty it, and no seed blend or gadget changes that for long. What does change it is putting the food somewhere a squirrel cannot climb to, jump to or drop onto, and that comes down to a few measurements you can check with a tape measure.

Start with distance, not gadgets

A baffle only blocks the route up the pole. If a squirrel can skip the pole entirely, the baffle is decoration. So placement comes first.

The published figures are consistent with one another:

• Project FeederWatch, run by the Cornell Lab of Ornithology and Birds Canada, warns that squirrels can jump to feeders placed less than ten feet from a tree or building.
• Audubon advises setting a pole feeder at least 8 to 10 feet from anything solid, including trees, buildings and fences.
• A National Wildlife Federation article reports that most squirrels can long jump about 8 feet.
• A University of Nebraska–Lincoln Extension piece recommends at least 10 feet from any launch point in any direction, and notes that squirrels will jump up 5 feet from the ground.

Treat 10 feet as the working number and measure from the nearest thing a squirrel can stand on, not from the tree trunk. An overhanging branch, a deck railing, a grill, a parked wheelbarrow and the roof edge all count. Look up as well as sideways, since squirrels also come down from roofs and branches.

Do baffles work?

Yes, when the distances above are respected. FeederWatch describes baffles, meaning barriers placed between squirrels and feeders, as usually the best way to keep squirrels away from seed. The Nebraska extension article adds the honest caveat that baffles are not always guaranteed to work against such acrobatic animals. Most failures trace back to placement or size rather than to the idea itself.

Pole-mounted baffles

This is the standard setup: a feeder on a metal pole with a baffle below it. Audubon says the baffle should sit between four and five feet off the ground. Lower than that, and a squirrel can use the baffle as a launch pad. Much higher, and the animal can jump from the pole past the baffle to the feeder. Audubon also notes that baffles are ideally metal and come in cylindrical and wrap-around styles.

For the cylinder type (often sold as a stovepipe baffle), the National Wildlife Federation article gives minimum dimensions: at least 6 inches in diameter and 18 inches long, mounted 5 feet off the ground.

Hanging baffles for wooded yards

If every spot in your yard is under a tree, a pole in the open is not an option. A tilting, umbrella-shaped baffle hung above the feeder is the alternative. FeederWatch says a tilting baffle at least 18 inches in diameter placed above the feeder might work, which is careful wording worth noticing. The National Wildlife Federation piece gives the same 18-inch minimum width and suggests hanging the feeder from a 3- to 4-foot length of monofilament line.

For a feeder strung on a horizontal wire or line between two supports, both FeederWatch and the Nebraska extension article suggest running the line through plastic tubing. The tubing should spin when a squirrel tries to walk across it.

Feeders built to shut squirrels out

Hardware can back up a good location, though it rarely replaces one. FeederWatch is blunt that squirrel-proof feeders often fail because squirrels find a way in.

Weight-activated feeders close a shroud over the seed ports when something as heavy as a squirrel lands on them, while lighter birds feed normally. Audubon rates them as good rather than great, and points out a weak spot: hang one too close to a pole or trunk and a squirrel can hold on to the support, pull the feeder over and eat without triggering the mechanism.

Caged feeders surround a tube with wire mesh. They keep squirrels away from the food, but the National Wildlife Federation article notes that birds about the size of a cardinal or larger cannot get in either. That is a fair trade if chickadees and finches are your main visitors, and a poor one if you want cardinals and woodpeckers.

Seed swaps and hot pepper

Changing what is in the feeder is the easiest thing to try, and the least dependable.

Safflower. Audubon rates safflower "It'll Do," saying squirrels generally dislike the taste. The research summarized by the National Wildlife Federation is less encouraging: ecologist David Horn of Millikin University found that squirrels avoided safflower only about 50 percent of the time, with regional differences, and that many bird species do not care for it either. FeederWatch says safflower attracts cardinals and other big-billed birds, but that most birds prefer sunflower. If you are weighing a switch, our bird seed guide covers what each seed brings in.

Hot pepper seed. Capsaicin is the compound that makes chili peppers hot, and it is sometimes added to birdseed mixes to discourage squirrels. FeederWatch says squirrels and other mammals may be deterred from eating seed treated with it. The National Wildlife Federation article adds that squirrels can build up a tolerance, so it may work best at the start.

Does hot pepper seed hurt birds?

The honest answer is that it probably does not, but the question has not been settled by research. In the National Wildlife Federation article, Cornell Lab ornithologist Kevin McGowan says capsaicin has no harmful effect on birds. FeederWatch is more cautious: it states that it is unaware of any research on the effect of high doses of capsaicin on birds, and it discourages adding untested products to bird food. A reasonable reading is that commercially prepared hot pepper seed is a low-risk experiment, while homemade pepper coatings are something to skip.

What not to do

Two common tricks cause real harm and are worth ruling out.

• Grease, oil or petroleum jelly on the pole. The Nebraska extension article says not to coat poles or trees with these substances because they mat down fur and leave animals exposed to freezing temperatures. The National Wildlife Federation article warns the grease can also end up in birds' feathers.
• Mothballs. The same National Wildlife Federation article advises against hanging them near feeders: they are a registered pesticide meant to be used only as the label directs.

If you can't beat them, redirect them

Some households settle on a truce. FeederWatch suggests offering peanuts or dried ears of corn some distance from the bird feeders to draw squirrels away. The National Wildlife Federation article describes the same approach with cracked corn or peanuts in the shell, and says it works best when the bird feeders are baffled and the squirrel station is not. It also flags the downsides: squirrels go through a lot of food, and a ground-level buffet is a poor idea if raccoons or opossums visit your yard.

If you do switch foods or add a station, keep up the routine in our guide to cleaning a bird feeder; more food on offer means more mess to manage.

Frequently asked questions

How far can a squirrel jump to reach a feeder?

The National Wildlife Federation article puts the typical long jump at about 8 feet, and Nebraska Extension notes squirrels will jump up 5 feet from the ground. That is why the common placement advice is roughly 10 feet from any launch point.

Will safflower seed stop squirrels on its own?

Not reliably. In research cited by the National Wildlife Federation, squirrels avoided safflower only about half the time, and many birds also pass it up. It is a reasonable add-on to a baffled pole, not a substitute for one.

Can I make a squirrel baffle myself?

People do. FeederWatch notes that bird watchers have used old vinyl records, plastic salad bowls, two-liter soda bottles and stovepipes as barriers. Homemade versions still need to meet the same size and placement rules as store-bought ones.

Sources

• Other Feeder Visitors — Project FeederWatch (Cornell Lab of Ornithology and Birds Canada)
• How to Stop Squirrels From Raiding Your Bird Feeders — National Audubon Society
• Thwarting Backyard Squirrels — National Wildlife Federation
• Pests & Wildlife: Preventing Conflicts With Tree Squirrels — University of Nebraska–Lincoln Extension