The Ruby-throated Hummingbird is the only breeding hummingbird in eastern North America, and for millions of backyard birders it is the most anticipated arrival of spring. Weighing less than a nickel, this tiny bird makes a nonstop 500-mile crossing of the Gulf of Mexico twice a year — one of the most remarkable feats of endurance in the bird world.
Identification
Adult Male
The male is unmistakable when the light catches his throat. The gorget (throat patch) is a brilliant iridescent ruby red that can appear black in poor light. The back is metallic green, the underparts are grayish white, and the tail is forked and dark.
The key to seeing the gorget color is light angle. If the bird is facing away from you or the sun is behind it, the throat looks black. Wait for the bird to turn — the flash of red when the light hits is one of the great visual moments in backyard birding.
Adult Female
Females lack the red gorget entirely. They are green above and white below with buffy flanks. The throat is plain white or faintly streaked. The tail is rounded (not forked) with white tips on the outer feathers.
Females and immatures are the default hummingbird you will see at feeders in the East. If you see a hummingbird without a red throat east of the Great Plains, it is almost certainly a Ruby-throated — other species are rare vagrants in the region.
Immature Male
Young males look like females until late summer or fall, when they begin developing scattered red feathers on the throat. A hummingbird with a few red throat feathers mixed into a white throat is an immature male Ruby-throated.
Similar Species
In most of eastern North America, there are no similar species — the Ruby-throated is the only expected hummingbird. Confusion arises in a few scenarios.
Rufous Hummingbird — rare but regular vagrant to the East in fall and winter (October through February). Males are orange-rufous overall, not green. Females and immatures show rufous on the flanks and tail base, which Ruby-throateds lack.
Hummingbird moths — Sphinx moths (especially the Hummingbird Clearwing) hover at flowers and are genuinely mistaken for hummingbirds more often than you might think. Moths have antennae, lack a bill, and their wing beat pattern is visibly different.
In the West, multiple hummingbird species overlap and identification becomes much more complex. That is a different guide entirely.
Migration
Ruby-throated Hummingbird migration is one of the great spectacles of eastern birding, even though it happens one bird at a time.
Spring Migration
Males arrive first, typically 1-2 weeks ahead of females. Timing varies by latitude:
Gulf Coast states: late February through mid-March. Southeast US: mid-March through early April. Mid-Atlantic and Midwest: mid-April through early May. New England and southern Canada: early to mid-May.
The Gulf crossing is still debated — some birds fly nonstop across open water, while others may island-hop or follow the coast through Texas. Either way, they arrive on the Gulf Coast in March having burned through most of their fat reserves from a 500+ mile overwater flight.
Fall Migration
Fall departure is more gradual. Males leave first, often by late July or early August. Females and immatures follow through September and into October.
A common myth is that leaving feeders up will prevent hummingbirds from migrating. This is false — migration is triggered by day length, not food availability. Keep your feeders up until at least two weeks after you see your last hummingbird. Late migrants and vagrants will appreciate them.
Tracking Migration
Check Birdr's sighting map in spring to track the wave of Ruby-throated Hummingbird arrivals moving north. This helps you know exactly when to put your feeders out.
Attracting Ruby-throated Hummingbirds
Feeders
The sugar-water recipe is simple: 4 parts water to 1 part white granulated sugar. Boil the water, dissolve the sugar, let it cool completely before filling the feeder.
Do not use red dye, honey, brown sugar, or artificial sweeteners. Plain white sugar dissolved in water is nutritionally close to flower nectar and is all you need. Red dye is unnecessary — the feeder itself provides the color attraction.
Change the solution every 3-5 days in moderate weather, every 1-2 days in hot weather above 90 degrees Fahrenheit. Fermented or moldy sugar water can make birds sick.
Clean the feeder with hot water and a bottle brush every time you change the solution. Rinse thoroughly — no soap residue. If black mold develops, soak in a dilute vinegar solution.
Feeder placement: hang feeders in partial shade to slow fermentation. Near a window is fine — hummingbirds rarely injure themselves on windows at feeder-approach speed. Place feeders where you can see them from inside. The whole point is watching them.
Native Plants
Feeders supplement natural food sources but do not replace them. Planting native flowers that hummingbirds favor is the most effective long-term strategy for attracting them.
Top plants for Ruby-throated Hummingbirds: Cardinal Flower (Lobelia cardinalis), Trumpet Creeper (Campsis radicans), Bee Balm (Monarda), Coral Honeysuckle (Lonicera sempervirens), Red Columbine (Aquilegia canadensis), Jewelweed (Impatiens capensis).
Hummingbirds prefer tubular red or orange flowers, but they visit flowers of any color. A garden with a succession of bloom times from April through September will keep hummingbirds in your yard all season.
Habitat
Hummingbirds need more than nectar. They eat small insects and spiders for protein — especially important during nesting. Avoiding pesticides in your yard directly benefits hummingbirds by maintaining their insect food supply.
They also need perching spots. Thin, exposed branches near feeders or flower gardens serve as lookout posts. Males are territorial and will claim a perch with a view of their preferred feeder.
Nesting
The nest is a masterpiece of engineering — a tiny cup about 1.5 inches across, built from plant down and spider silk, covered in lichens for camouflage. It stretches as the nestlings grow. Nests are usually saddled on a thin branch 10-40 feet up, often over water.
Females do all the nest building, incubating, and chick-rearing. Males play no role after mating. The female lays 2 eggs, incubates them for about 16 days, and feeds the nestlings for about 3 weeks before they fledge.
You can help nesting hummingbirds by leaving spider webs intact in your garden — females harvest the silk for nest construction.
Learn More
Explore the Ruby-throated Hummingbird species page on Birdr for photos, range maps, and recent sightings near you. Practice identifying hummingbirds with our bird identification quizzes, or check the field guide for other species in your region.