Costa's Hummingbird

Calypte costae

Costa's hummingbird is a species of hummingbird in the family Trochilidae. It breeds in the arid, semi-arid and Mediterranean climate zones of the Southwestern United States and northwestern Mexico, mainly in Southern California and the Baja California Peninsula. Like many hummingbirds in the region, it can be found on the Pacific coast, often visiting backyard hummingbird feeders and gardens with flowering plants, as well as in more wild ecosystems, such as the conifer and oak forests, chaparral, and high desert habitats found further inland. When not in the US, the species often winters in western Mexico. Source

Where it is now

In the last 8 weeks this bird was recorded 157,413 times across 6 areas (each area is a 5 degree square).

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Movement and weather

Over the weeks it was present in the past year, its centre in North America ranged from 24°N in January to 36°N in August, about 1,300 km apart.

Arrival dates

The week it was first heard regularly in each region, after at least six weeks away. Dates differ from south to north, so a region has a range.

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Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.