Quick overview: The Pacific Northwest breaks the pattern nearly every other region in this series follows — Anna's Hummingbird doesn't migrate away from this region at all, staying year-round even through freezing winter nights. Rufous Hummingbirds, by contrast, are true migrants, arriving as early as late February in southern Oregon and reaching Washington by March and April, then departing by July and August — among the earliest fall departures of any migratory hummingbird in the country. Keep a feeder up year-round if you're anywhere in the Pacific Northwest's lowlands, since Anna's Hummingbirds are actively present through every season, including the dead of winter.

What Makes This Region Different

Every other region in this series is defined, in some way, by species that leave. The Pacific Northwest is defined by one that doesn't. Anna's Hummingbird's range expansion into this region is one of the most thoroughly studied cases of rapid range change in North American birds — a peer-reviewed study in The American Naturalist documented "striking fits to simple models of exponential growth" in Pacific Northwest populations following colonization in the 1960s and 1970s. Before that, this species was largely confined to California and Baja California. Its expansion into Washington and Oregon is attributed by the U.S. National Park Service, American Bird Conservancy, and National Audubon Society to a combination of non-native ornamental flowering plants — especially winter-blooming eucalyptus — and the rise of backyard feeders, both of which made winter survival here newly possible for a species that previously couldn't have overwintered this far north.

The Hummingbirds You'll See in This Region

Anna's Hummingbird is the Pacific Northwest's defining resident species, present in lowland areas of Washington and Oregon throughout the entire year, including winter. Males display an iridescent rose-red crown and throat that can look nearly black without direct light, and are also one of the only North American hummingbirds known to sing — a scratchy, buzzy song delivered from an exposed perch.

Rufous Hummingbird is the region's primary true migrant, arriving earlier in spring than almost any other migratory hummingbird species in the country. Males are bright orange-red and unmistakable; this species also famously undertakes a distinctive clockwise loop migration, traveling north largely along the coast and returning south later through the Rocky Mountains.

Black-chinned Hummingbird appears in smaller numbers, mostly in drier interior parts of Washington and Oregon east of the Cascades, generally following a more typical spring-arrival, fall-departure pattern.

Migration Timing by Sub-Region

Pop's tip: If you're anywhere in the Pacific Northwest lowlands, don't put your feeder away seasonally the way you might elsewhere in the country — Anna's Hummingbirds are genuinely present and feeding through winter, and taking a feeder down "for the season" here means removing a real, active food source rather than simply waiting out an empty period.

Where They're Coming From, and Where They're Headed

Rufous Hummingbirds wintering in Mexico begin their journey remarkably early, tracking the earliest spring blooms up the Pacific Coast — timing that allows them to reach as far as coastal Alaska by late spring, one of the longest migrations relative to body size of any bird in North America. Their return trip in mid-to-late summer takes a genuinely different, more interior route through the Rockies and Mountain West, rather than retracing the coastal path — part of the same clockwise loop pattern documented by the Cornell Lab of Ornithology.

Anna's Hummingbirds, by contrast, largely don't migrate at all in this region. Their year-round presence is sustained by a combination of reliable backyard feeders and non-native ornamental plants — particularly flowering trees like eucalyptus — that bloom during months when native food sources would otherwise be scarce.

How Does Anna's Hummingbird Survive Freezing Winter Nights?

This is one of the most remarkable adaptations in the hummingbird world: Anna's Hummingbirds enter torpor on cold nights, a controlled drop in body temperature and metabolic rate that dramatically reduces how much energy the bird needs to burn overnight. Research cited by Wikipedia's summary of the species notes that Anna's Hummingbirds studied at colder, higher-elevation sites used torpor more frequently and for longer periods than those at lower elevations — without this adaptation, a bird this small simply couldn't survive freezing Pacific Northwest winter nights on stored energy reserves alone.

How We Know This

Species range, arrival, and departure timing referenced in this guide draw on data compiled by the Cornell Lab of Ornithology's All About Birds and eBird platforms, which aggregate millions of citizen-reported sightings to map real-time migration patterns. The mechanism behind migration timing itself — driven by day length and hormonal changes rather than food or temperature — is confirmed by researchers at the National Audubon Society. Anna's Hummingbird's range expansion into the Pacific Northwest is one of the most thoroughly documented cases in the field, backed by a peer-reviewed population study in The American Naturalist, corroborated by the U.S. National Park Service and the American Bird Conservancy.

Should I Take My Feeder Down in Fall?

Here the standard advice needs a genuine regional adjustment. For Rufous Hummingbirds specifically, the usual rule applies: leaving a feeder up doesn't delay or affect their migration timing, which is driven by day length and hormonal cues. But since Anna's Hummingbirds are present year-round throughout the region's lowlands, there often isn't a "take it down" season at all — many Pacific Northwest birders maintain feeders continuously, only pausing briefly for cleaning.

Practical recommendation: in lowland Washington and Oregon, treat your feeder as a year-round fixture rather than a seasonal one. In colder nights, consider a feeder heater or wrap (available from birding suppliers) to prevent nectar from freezing, since Anna's Hummingbirds will still need to feed even on the coldest nights.

How to Help Hummingbirds Through This Region

• Keep feeders up year-round in the lowlands — Anna's Hummingbirds depend on this consistent food source through every season, including winter.
• Consider a feeder heater or insulating wrap for winter months, since nectar can freeze on especially cold nights, cutting off access exactly when torpor-dependent birds need it most.
• Watch for Rufous Hummingbirds' unusually early spring arrival — late February in southern Oregon is genuinely one of the earliest hummingbird arrivals anywhere in the country.
• Keep nectar fresh — change every 3-5 days in typical Pacific Northwest temperatures, checking more often during any unusual heat.
• Add a comfortable perch or swing near your feeder — useful year-round given Anna's constant presence, not just during a migratory season.
• Plant early-blooming natives — red-flowering currant is an especially valuable choice here, since it blooms very early in the season, right when Anna's Hummingbirds are beginning to nest.

Frequently Asked Questions

Do hummingbirds migrate away from the Pacific Northwest in winter? Not entirely. Anna's Hummingbirds are year-round residents throughout the region's lowlands and do not migrate away at all. Rufous Hummingbirds, by contrast, are true migrants and do leave for the winter.

How do hummingbirds survive freezing nights in the Pacific Northwest? Anna's Hummingbirds enter torpor, a controlled drop in body temperature and metabolism that dramatically reduces the energy needed to survive overnight — research shows this is used more frequently at colder, higher-elevation sites, without which they couldn't make it through freezing winter nights.

When do Rufous Hummingbirds arrive in the Pacific Northwest? As early as late February in southern Oregon, with arrivals continuing into March and April farther north in Washington — among the earliest migratory hummingbird arrivals anywhere in the country.

Should I keep my hummingbird feeder up all winter in the Pacific Northwest? Yes, in the lowlands — Anna's Hummingbirds are actively present and feeding through winter, so many Pacific Northwest birders maintain feeders year-round rather than seasonally.

Why did Anna's Hummingbird's range expand into the Pacific Northwest? A peer-reviewed population study documented rapid exponential growth in Pacific Northwest populations starting in the 1960s and 1970s, attributed by researchers and organizations like the National Park Service and Audubon to widely planted non-native flowering trees (like eucalyptus) and the rise of backyard hummingbird feeders, both of which provided reliable winter food sources in climates the species couldn't previously have survived in.

Summary: Key Takeaways for Hummingbird Migration in the Pacific Northwest

• Anna's Hummingbird is a genuine year-round resident throughout the region's lowlands and does not migrate away at all — one of the most thoroughly documented range expansions in North American ornithology
• Rufous Hummingbirds are true migrants, arriving as early as late February in southern Oregon — among the earliest arrivals of any migratory hummingbird in the country
• Anna's Hummingbirds survive freezing nights through torpor, a controlled drop in body temperature and metabolism, used more heavily at colder, higher-elevation sites
• Keep feeders up year-round in the lowlands, considering a heater or wrap during the coldest winter nights
• Rufous Hummingbirds depart earlier than in most regions, typically by July or August, following a distinctive clockwise loop route back through the Rockies
• Timing and range-expansion data referenced throughout draw on Cornell Lab of Ornithology (eBird, All About Birds), National Audubon Society, U.S. National Park Service, American Bird Conservancy, and peer-reviewed research published in The American Naturalist

At Pop's Birding, we believe every backyard — big or small — has room for a little more wonder. Explore our feeders, nectars, swings, and wildflower seed blends to start building your own hummingbird sanctuary today.