Do Hummingbirds Fly in the Rain? What the Research Shows

Yes, hummingbirds fly in the rain. That part is simple. What's more interesting is that scientists didn't just watch this happen from a porch and shrug about it: they built an actual rain machine in a laboratory, turned it on Anna's hummingbirds hovering at a feeder, and filmed the birds flying through precipitation heavier than almost anyone reading this has ever stood in. Then they measured exactly what changed, down to individual wingbeats. That study is the backbone of this article, and it lets us answer the question with real numbers instead of the vague reassurance that fills most pages on this topic.

The Short Answer: Yes, and Here's What Actually Changes

Hummingbirds don't ground themselves for rain. They keep hovering at feeders and flowers through drizzle, steady rain, and even genuine downpours, which is why almost every article on this topic lands on the same one-word answer. But that "yes" isn't actually the interesting part of the question. The interesting part, and the part almost no other page backs up with real data, is what's happening to a hummingbird's flight mechanics while it does this. A hovering hummingbird in the rain isn't flying quite the same way it flies on a dry day. Wingbeat frequency shifts, body posture shifts, and the energy cost of staying airborne goes up. The rest of this article walks through exactly how much of each, using the one study that actually measured it.

Inside the Study: How Scientists Actually Tested This

The numbers behind this article come from a single, specific piece of research: Ortega-Jiménez and Dudley's 2012 study in Proceedings of the Royal Society B, titled "Flying in the rain: hovering performance of Anna's hummingbirds under varied precipitation." Rather than relying on field observation, the researchers built a laboratory rain rig capable of producing four distinct conditions: zero rain as a control, light rain, moderate rain, and heavy rain. Anna's hummingbirds were recorded hovering to feed under each condition using high-speed video, which let the team isolate exactly what rain intensity does to flight kinematics rather than guessing from anecdotes. The full study, available through PubMed Central, is the closest thing that exists to a controlled measurement of what rain actually does to a hovering hummingbird, which is why it's worth walking through in detail instead of skipping straight to a conclusion.

What Changes When the Rain Gets Heavier

Light rain, according to the study, had only a marginal effect on flight kinematics. Moderate rain was the first condition to show a measurable shift: wingbeat frequency dropped by about 7 percent compared with each bird's own dry-condition control performance, per Ortega-Jiménez and Dudley's findings. That's a fairly small adjustment for a bird whose wings already move in a tight figure-eight pattern at roughly 50 beats per second just to hold still in the air, and it shows how much slack there is before rain becomes a genuine flight problem.

Heavy rain is where things change more noticeably. The study tested hummingbirds at 270 millimeters per hour, an extreme, storm-grade rate used specifically to stress-test the birds' limits rather than to represent an ordinary shower. At that rate, hummingbirds hovering in the rain rig shifted to a more horizontal body and tail posture, increased wingbeat frequency substantially, and reduced stroke amplitude, meaning each wingbeat covered less distance, all compared with dry control conditions, per the study's detailed results. Those adjustments came at a real energy cost: the researchers estimated mechanical power output rose by roughly 9 percent, if a hummingbird's muscles and tendons store and return elastic energy perfectly between wingbeats, up to roughly 57 percent, if none of that elastic energy is recovered at all, compared with normal hovering. Despite that increased cost, the hummingbirds in the study hovered with no apparent loss of control, even at that extreme test rate.

How Feathers and a Mid-Air Shake Keep Them Dry Enough to Fly

Part of the answer to how hummingbirds pull this off comes down to their feathers. The same study compared the peak force a single raindrop delivers to a wing against the peak force it delivers to a solid surface, and found that feathers absorb roughly 50 percent of that impact force, per Ortega-Jiménez and Dudley. That cushioning matters more for an animal this small than it would for a larger bird, since the relative effects of both water loading and drop impact scale up as body size scales down.

The other part of the answer is a maneuver, not a body part. UC Berkeley's research coverage of this same study describes how hummingbirds shed accumulated water mid-flight by shaking their entire body, "like dogs," reaching accelerations of roughly 10 times the force of gravity. That's an intense, fast motion, and it lets a hovering or perched hummingbird get rid of extra water weight without ever having to land or stop feeding. Between feathers that absorb half the impact force of a falling raindrop and a shake that can fling off the rest, a hummingbird has two separate, physical answers to rain, not just a tolerance for getting wet.

When Rain Turns Into a Real Storm

Light rain, moderate rain, and even the extreme lab rate above are one thing. A genuine storm or hurricane is a different question, and it's one the study above doesn't directly answer, since it was conducted under controlled lab conditions rather than in hurricane-force wind. For that scenario, the most detailed account available comes from Perky-Pet's writeup on hummingbirds and hurricanes, which describes the birds hunkering down as tightly as they can in the most sheltered place available, often dense vegetation on the downwind side of a tree trunk, using strong, gripping feet to hold onto a branch even as wind picks up. The same piece describes hummingbirds observed feeding heavily when the eye of a hurricane passes overhead, and states that the majority of hummingbirds survive hurricanes over land unscathed.

Worth being direct about this source: Perky-Pet's article doesn't cite any studies of its own, so it's best read as an industry account of observed behavior rather than a peer-reviewed finding. It lines up with what's biomechanically plausible, given the strong feet documented elsewhere and a sheltering instinct that makes more sense than trying to fly through open wind, but it hasn't been tested in a controlled setting the way the rain-hovering study above has. Both things can be true at once: the wingbeat and posture numbers earlier in this article are peer-reviewed and specific, while the hurricane-survival claim here is a reasonable, widely repeated observation that simply hasn't been measured the same way.

Does Rain Actually Bring More Feeder Visits? Sorting Fact From Assumption

A claim that comes up constantly is that hummingbirds visit feeders more often during light rain. Worth being direct about this one too: no scientific source actually confirms that. It's the kind of claim that sounds plausible, gets repeated often enough to feel established, and still isn't backed by the same kind of measurement as the flight mechanics covered earlier in this article.

What the rain-hovering study does support is a narrower, more defensible version of that idea. Light and moderate rain barely impair a hummingbird's flight, per the wingbeat data above, so there's no physical reason a hummingbird would stop feeding just because it's drizzling outside. That's a genuinely different claim than saying visits go up, and it's worth keeping the two separate rather than letting one slide into the other. For a sense of how often hummingbirds eat under ordinary conditions, see our guide to hummingbird feeding frequency. Nothing in the available research suggests rain changes that baseline in either direction, whatever the anecdotal reports floating around online might claim.

Keeping a Feeder Rain-Ready

Since hummingbirds keep feeding through rain rather than waiting it out, it's worth keeping the feeder itself ready for wet weather. A feeder with a built-in rain guard or a roof over the ports meaningfully reduces how much rainwater gets into the nectar, which matters because diluted nectar spoils faster and gives a hummingbird less energy per visit. Our guide to where to hang a hummingbird feeder covers placement choices that help with this as well, and our guide to spotting nectar that has gone bad covers how to tell when rain-diluted nectar needs an earlier change than usual.

It's also worth not compounding a rain-diluted feeder with anything else that doesn't belong in it. We make our own nectar powder iron-free and dye-free for exactly that reason, so on a rainy day, rain is the only thing doing any diluting.