Yes. Most North American hummingbirds migrate south for winter. They travel hundreds or thousands of miles to reach warmer climates where nectar-producing flowers bloom year-round. A few species - notably Anna’s Hummingbird - stay put on the Pacific coast.
North American Hummingbird Migration
| Species | Migrates? | Winter range | Distance |
|---|---|---|---|
| Ruby-throated | Yes | Central America, southern Mexico | Up to 2,000 miles |
| Rufous | Yes | Mexico | Up to 4,000 miles |
| Black-chinned | Yes | Central Mexico | 1,000-2,000 miles |
| Allen’s | Yes | Central Mexico | 1,000-2,000 miles |
| Calliope | Yes | Southwest Mexico | 5,000+ mile round trip |
| Anna’s | Mostly no | Pacific coast year-round | Short local movements only |
| Buff-bellied | Partial | Gulf coast, Mexico | Short distance |
What Triggers Migration?
It is not cold weather or hunger. Hummingbirds respond to decreasing daylight hours. As days shorten in late summer and autumn, hormonal changes trigger the urge to fly south. They begin feeding intensely to build fat reserves before departure.
Ruby-Throated Hummingbird Migration
The Ruby-throated is the only breeding hummingbird in eastern North America. Its migration is one of the most impressive in the bird world.
Outbound (autumn) - Leaves breeding grounds August-September. Many cross the Gulf of Mexico in a single non-stop flight of 500 miles, taking 18-22 hours.
Return (spring) - Arrives back March-May. Males arrive first to establish territories, females follow 1-2 weeks later.
Rufous Hummingbird - Longest Migration
The Rufous Hummingbird has the longest migration of any hummingbird relative to body size. It breeds as far north as Alaska and winters in Mexico - a round trip of nearly 8,000 miles. They follow the Pacific coast southbound in autumn and return northbound through the Rocky Mountains in spring.
Anna’s Hummingbird - The One That Stays
Anna’s Hummingbird is the exception. It lives year-round along the Pacific coast from British Columbia to Baja California. It survives winter by:
- Entering torpor on cold nights (dropping body temperature to save energy)
- Feeding on winter-blooming flowers and garden feeders
- Eating small insects and spiders for protein
Migration Timeline
| Month | What is happening |
|---|---|
| February-March | First hummingbirds arrive on Gulf coast |
| April-May | Migration wave moves north across eastern and western US |
| June-July | Breeding season - all species on breeding grounds |
| August-September | Southbound migration begins |
| October-November | Most hummingbirds have reached winter range |
| December-January | Only Anna’s and occasional stragglers remain in the US |
When to Take Down Feeders
Leave feeders up for at least two weeks after you see the last hummingbird. Late migrants and vagrant birds may still pass through. Keeping a feeder out will not prevent hummingbirds from migrating - the urge to migrate is hormonal, not based on food availability.
In areas where Anna’s Hummingbirds overwinter, keep feeders up all year. Prevent nectar from freezing by bringing feeders indoors overnight or using a feeder warmer.
Hummingbirds migrate solo, not in flocks. Each bird makes the journey independently, navigating by instinct. A Ruby-throated Hummingbird weighing less than a 10p coin can fly 500 miles non-stop across the Gulf of Mexico - one of the most remarkable feats in the bird world.
