Hummingbird Feeders in Fall: When to Take Yours Down

The question arrives every August, usually phrased as guilt: if I leave the hummingbird feeder up, am I keeping the birds from going?

You are not. That has been the settled answer for a long time. What almost nobody tells you is that this myth is not internet folklore — it is a fossil of advice real experts once handed out, and how it collapsed tells you more about your September yard than the myth-bust does.

The myth was once the careful position

Audubon's account of western hummingbirds turning up in the winter Southeast records that early expert advice genuinely did warn against leaving feeders out past fall, on exactly this reasoning: a feeder would tempt a bird into staying, and then kill it. Louisiana bander Nancy Newfield questioned the assumption and banded the birds that showed up anyway. Christmas Bird Counts before the 1970s logged two or three western hummingbirds a season; by the 1980s and 1990s the numbers had climbed enough that the old advice looked backwards.

If you inherited this rule from a neighbour or a feeder box, you inherited what was once the responsible position. It simply lost.

What actually sets the departure clock

Audubon's feeding FAQ answers it flatly: hummingbirds are genetically programmed to head south, and what tells them it is time is the changing length of the day and the angle of the sun — not a shortage of nectar, and not a cold snap.

The strongest evidence is not a lab study but a pattern you can check yourself. Audubon field editor Kenn Kaufman makes the argument with two birds that leave in the middle of plenty:

• Adult female Short-billed Dowitchers are flying south from the Arctic by late June, quitting the tundra while food is at its most abundant.
• Adult Orchard Orioles start leaving northern breeding areas by the first of August, checking out at the peak of summer.

His conclusion: feeders will not change the habits of ordinary summer residents, or of migrants passing through on schedule.

Ohio State University Extension gives the actionable version. Leaving feeders up through migration season does not encourage hummingbirds to stay; what a full feeder does is hand fuel to a bird about to attempt something enormous. One preparing to migrate fattens from roughly three grams to more than five — from the weight of a penny to the weight of a nickel.

So when do you take it down?

Two published rules exist, and they agree. Audubon says keep feeders up for two weeks after you see the last bird using one; Ohio State says leave them up through October, or until you stop seeing visitors. Pick whichever you will actually follow, then find your row:

Note what that two-week rule actually measures. It is not a calendar date — it is a stopwatch started by the last hummingbird you see, which is why a Vermont yard and a Georgia yard follow the same rule and take feeders down a month apart.

The West Coast reads this question backwards

Between northwestern Baja California and British Columbia, the whole takedown conversation is aimed at somebody else. Audubon lists Anna's Hummingbird as resident across that entire stretch, Allen's as resident in coastal Southern California, and Costa's from Baja through southeast California to western Arizona. Oregon State University Extension says the same for the Pacific Northwest: Anna's can be seen year-round.

If your hummingbirds leave:

• Start the two-week clock at your last sighting.
• Keep the nectar fresh through those two weeks — a stale feeder is worse than none.
• Clean, dry and store it; get it back out a week or two before spring arrivals.

If your hummingbirds do not leave:

• Do not take it down at all. Audubon's answer to year-round feeding where birds stay year-round is a plain yes, with the usual cleaning discipline.
• Expect torpor on cold nights. A normal body temperature of about 102°F can drop 20°F in shallow torpor and 40°F in deep torpor, so a bird emerging from that on an icy morning is running on empty.
• Copy Oregon State's hedge, which is carefully worded: it is believed that feeders add to a hummingbird's food supply rather than making it dependent.

The nuance every myth-bust page skips

Here is where the flat "feeders don't affect migration" answer gets too blunt to be honest.

Your feeder will not delay one hummingbird by a single day. But feeders, collectively, over decades, moved a species. Anna's Hummingbird was once a bird of southern California and Baja; since the 1930s it has spread north to British Columbia and east to Texas. Audubon reports a study finding the birds colonise new places — even cold ones — based on housing density plus flowery landscaping and nectar feeders, and Oregon State attributes the same expansion to urban plantings with year-round blooms alongside warming temperatures.

The straggler is the whole point

The best reason to leave a feeder up is the bird you were most afraid of trapping. Kaufman's example is exact: eastern Pennsylvania's first-ever Anna's Hummingbird arrived in October 2010 and stayed the winter while neighbours put up extra feeders to help it along. Birds like that are not being held back. Their internal compass is already broken, and sugar water is the only thing improving their odds.

So in the last weeks of your season, do four things and stop worrying about the fifth:

• Keep the ratio at one part white sugar to four parts water. No dye, no honey, no substitutes — our nectar calculator scales it to any batch, and the setup guide covers the rest.
• Keep changing it. Audubon's cadence is every day or two in hot weather, every three days in temperate weather, twice a week when it cools.
• Actually scrub it, not just rinse it — the same routine as any other feeder you own. If yours will not come apart, start over from our hummingbird feeder picks — the Aspects HummZinger HighView (on Amazon) is the open-saucer benchmark we point people to for exactly this reason.
• Write down the date of your last sighting. It is the number the two-week rule runs on, and next spring it tells you when to hang the feeder again.

The one thing not on that list is the takedown deadline you were worried about. There isn't one, and there never was. For the wider version of what September is doing to your yard, fall migration is the bigger story your hummingbirds are one thread of.