Rufous Hummingbird (Selasphorus rufus): The Complete Guide

Male Appearance

The adult male Rufous Hummingbird is one of the most distinctive and instantly recognizable hummingbirds in North America --- a bird that appears to be constructed primarily from burnished copper and flame. His upperparts, flanks, and tail are a rich orange-rufous (from which the species takes both its common and scientific name), with a green gloss on the crown and scattered green feathering on the back in some individuals. The gorget is iridescent orange-red, blazing fiery scarlet in full sun and appearing dark copper in shade. His tail feathers are rufous at the base shading to dark tips, and are distinctly pointed on the outer feathers. The underparts are white on the belly and throat surround, contrasting sharply with the orange flanks. No other regularly occurring North American hummingbird is predominantly rufous-orange; this field mark alone is usually sufficient for a confident identification.

Female Appearance

Female Rufous Hummingbirds are substantially more cryptic than males but carry diagnostic marks for the observant birder. The upperparts are green, similar to other female hummingbirds, but the flanks show a distinct rufous or buffy-orange wash --- broader and warmer in tone than the buffy flanks of a female Allen's. The tail is the critical field mark: the central tail feathers are green, but the outer feathers are rufous at the base with a dark subterminal band and white tip. When the tail is fanned, this pattern creates a distinctive orange-and-white sunburst visible even in flight. The throat is white or pale buff with a central cluster of orange-red iridescent spots forming an incomplete gorget.

Juvenile Appearance

Juvenile Rufous Hummingbirds in their first fall closely resemble adult females: green above, white below with rufous flanks, rufous in the outer tail feathers. Young males begin acquiring rufous body plumage on the back and flanks during the fall molt, and may show a mixture of rufous and green upperparts on their first southward migration. By the following spring, most males have transitioned to the full adult rufous plumage. Young females are distinguished from adults by their fresh, unworn flight feathers and finer spotting on the throat.

Similar Species & How to Tell Them Apart

• Allen's Hummingbird (Selasphorus sasin): The most similar species, and the most frequently confused. Adult male Allen's has a green back (Rufous males typically show rufous back with variable green); female and juvenile separation is essentially impossible in the field without careful tail feather measurements. Range provides context: Allen's breeds primarily in coastal California and Oregon, with limited overlap with Rufous in Oregon.

• Broad-Tailed Hummingbird (Selasphorus platycercus): Females similar but show less rufous in the tail base; male Broad-Tailed is green-backed with a rose-red gorget and produces a distinctive metallic wing trill in flight --- the most reliable identification cue.

• Female Anna's Hummingbird: Larger, stockier, with virtually no rufous in the tail (Rufous always shows rufous at the tail base). Anna's holds its tail relatively still while hovering.

The Rufous Hummingbird undertakes the longest migration of any hummingbird species on Earth, measured relative to body size. The one-way distance from breeding grounds in Alaska to wintering grounds in Mexico can exceed 2,000 miles (3,200 km), with round-trip journeys reaching 4,000 miles (6,400 km). This migration follows a clockwise loop across western North America --- a pattern driven by the timing of flowering along different corridors in different seasons.

Spring migration (northbound):

• Departs Mexican wintering grounds: late February to April

• Moves through California and the Pacific Coast: February--April

• Reaches Oregon and Washington: March--April

• Reaches British Columbia and Alaska: April--May

• Spring route follows the Pacific Coast northward, tracking the bloom progression of red flowering currant, paintbrush, and other early-season flowers

Fall migration (southbound):

• Adults begin departing breeding grounds: late June to July (one of the earliest fall migrations of any North American bird)

• Moves southward through the Rocky Mountains and Great Basin at high elevation, following late-summer blooming wildflowers at 8,000--12,000 feet

• Reaches Arizona, New Mexico, and Colorado stopovers: July--August

• Arrives in Mexican wintering grounds: October--November

• Fall route is inland and at higher elevation than the coastal spring route --- this clockwise loop strategy exploits the maximum available nectar along both corridors

The fall migration through the Rocky Mountain states (particularly Colorado, Utah, and New Mexico) represents a critical stopover opportunity. Well-maintained feeders and native plantings in mountain communities along this corridor directly support birds accumulating the fat reserves needed for the final push to Mexico.

The Rufous Hummingbird's aggression at feeders creates specific management considerations:

Multiple feeders: Because one dominant Rufous male will attempt to monopolize any single feeder, placing multiple feeders out of mutual line-of-sight --- around building corners, screened by shrubs, in separate sections of the yard --- allows subordinate birds to feed. Four or five smaller feeders out of sight of each other will support far more birds than one large feeder.

Feeder style: Any standard feeder design works. Saucer-style feeders are easiest to keep clean and discourage wasps (which prefer deep reservoir feeders). Red color elements are attractive but not essential with this highly motivated species.

Placement: 4--6 feet above ground is standard. During peak migration (late July through September in mountain areas; July--August in the Pacific Northwest), consider setting up additional temporary feeders to support the high numbers passing through.

Nectar freshness: In the warm late-summer temperatures of peak Rufous migration season, replace nectar every 2--3 days. Hot direct sun can cause fermentation within 24 hours --- position feeders in morning sun with afternoon shade where possible.

Female Rufous Hummingbirds construct their nests on their arrival at breeding grounds, which may occur in the Pacific Northwest as early as March and in Alaskan breeding territories by May. The nest is placed on a downward-sloping conifer branch, typically 4--30 feet above ground, in a sheltered position beneath overhanging foliage that provides protection from rain and wind --- an important consideration in the wet Pacific Northwest climate.

The nest is the standard hummingbird cup: a compact structure of plant down and fibers bound together with spider silk, decorated externally with lichen and bark fragments. In coniferous forest environments, Rufous nests are often beautifully camouflaged with gray-green lichen that matches the host branch almost exactly.

• Clutch size: 2 eggs

• Incubation period: 15--17 days, by the female alone

• Nestling period: 20--26 days

• Broods per season: Typically 1; occasionally 2 in southern portions of range

The male departs the breeding territory shortly after mating, often beginning southward migration before the female has even finished laying her clutch --- one reason adult male Rufous appear in Rocky Mountain and southwestern US stopover sites weeks before females and juveniles.

The Rufous Hummingbird is listed as Near Threatened on the IUCN Red List --- one of the few North American hummingbird species to carry a formal conservation alert. Population estimates indicate declines of 43--65% since 1970, with eBird trend analysis reporting a range-wide decline of 14.5% between 2012 and 2022 alone (approximately 1.2% per year). The situation is most severe in its core coastal breeding range from Alaska to Oregon, where declines of 30% or more over 11-year periods have been documented in some urban areas.

Primary threats:

• Breeding habitat loss: Logging of old-growth and mature second-growth forest in the Pacific Northwest eliminates both nesting sites and the structural diversity that supports flowering understory plants

• Climate change: Shifts in wildflower bloom timing are decoupling the arrival of Rufous Hummingbirds with peak nectar availability --- a phenological mismatch with potentially severe consequences for breeding success

• Pesticide and herbicide use: Reduction of insect prey on breeding grounds compromises nestling nutrition; herbicides eliminate native flowering plants from breeding and migration habitats

• Competition from year-round residents: The expanding Anna's Hummingbird population now occupies feeders and territories year-round at sites where Rufous previously had seasonal access to resources

• Habitat loss on wintering grounds: Pine-oak forest in the Sierra Madre of Mexico is subject to ongoing logging and agricultural conversion

What you can do:

• Maintain feeders from the first spring arrival (March--April in the Pacific Northwest) through late September to support both northward and southbound migrants

• Plant native red-flowered species along the Pacific Coast and Rocky Mountain corridors

• Advocate for protection of Pacific Northwest old-growth and mature forest

• Eliminate pesticides in your yard --- Rufous nestlings depend on insects for protein

• Participate in eBird and Feederwatch reporting to contribute population monitoring data

• Follow the Rufous Hummingbird's story on the NectarBloom Hummingbird Trail, where we document migration timing reports from across the western US