Hummingbirds feed on both insects and nectar.
Although species in North America encounter many
nectar-bearing flowers on their migrations, they
have a decided preference for red flowers. In
southern and central California, Costa's feeds
extensively on the red penstemon. Since this
plant is found mainly in habitats where Costa's
is the only resident hummingbird, it is probably
the plant's chief pollinator.
Average weight: male 3.05 g, female 3.22 g.
Female birds are larger than males.
Adult male: Metallic green back, violet-purple
crown and gorget with very long side throat
feathers, green breast.
Adult female: Green back and crown, white breast,
white throat with some black spots, buff sides,
white tips on outer tail feathers.
Observed in Alaska, Arizona, California, Kansas,
Nevada, New Mexico, Oregon, Texas, Utah, and
British Columbia. Winters in SE California, SW
Arizona, NW Sonora, and Baja. Costa's don't
migrate very long distances, and can be among the
first migrant birds to arrive in the spring.
Hummingbird Range Map