Costa's Hummingbird in September

September is the peak of fall migration. Huge numbers of birds move south on cold fronts, mixed flocks form, and summer residents slip away almost unnoticed. Young birds making their first migration appear in places the species rarely visits.

For the Costa's Hummingbird specifically, September is a fall month of relative routine, with the species settled into its seasonal pattern across its range. Across the 5 states and provinces where Costa's hummingbirds occur, what the bird is doing this month depends heavily on latitude — the details below break it down by band.

Southern states

absent

Mid-latitudes

year-round resident

Northern states & Canada

absent

In September, Costa's hummingbirds are absent in the South, year-round resident across the mid-latitudes, and absent in the northern states and Canada. That north–south split is the defining feature of this month: where you live changes which version of this bird you're looking at.

Costa's hummingbirds are not nesting in September. The season runs February–May at mid-latitudes.

Outside the nesting season, Costa's hummingbirds put their energy into feeding and flocking rather than territory and young — which is exactly what makes them easier to watch and attract this month.

• Nectar and gnats

Nests in late winter in the Sonoran Desert and leaves the hottest areas by midsummer.

Migrants passing through may stop at feeders for a day and never return — September rewards watching closely. Natural seed and fruit crops are abundant, so feeder traffic can be uneven.

Full Costa's Hummingbird diet guide → · Best feeder for Costa's hummingbirds →

Costa's hummingbirds are settled and predictable in September, which makes this a good month to learn the bird's routine — same feeders, same perches, same times of day.

The state guides below show exactly where in your region Costa's hummingbirds are expected this month and which native plants hold them in a yard.

ArizonaCaliforniaNevadaNew MexicoUtah