
Tens of Millions of Western Birds Depend on These Two Regions During Migration
California’s Central Valley and the Colorado River Delta are critical stopover sites for dozens of migrant species, according to new research.
Adult male. Photo: Peter Nye/Audubon Photography Awards
Calypte anna
Conservation status | Since the 1950s, has expanded its breeding range both north and east. Very common in much of its range, adapting well to suburban areas. |
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Family | Hummingbirds |
Habitat | Gardens, chaparral, open woods. Found in a wide variety of habitats within its range, including streamside groves, chaparral, open oak woodland, coastal sage scrub, gardens, city parks. Most common in lowlands and lower mountain slopes, but may wander to high mountain meadows in late summer. |
At flowers, usually feeds while hovering, extending its bill and long tongue deep into the center of the flower. At feeders, may either hover or perch. To catch small insects, may fly out and take them in midair, or hover to pluck them from foliage.
2. White. Incubation is by female only, 14-19 days. Young: Female feeds the young, sticking her bill deep into their mouths and regurgitating tiny insects, perhaps mixed with nectar. Age of young at first flight about 18-23 days.
Female feeds the young, sticking her bill deep into their mouths and regurgitating tiny insects, perhaps mixed with nectar. Age of young at first flight about 18-23 days.
Mostly nectar and insects. Takes nectar from flowers, and will feed on tiny insects as well. Will also feed on sugar-water mixtures in hummingbird feeders.
May begin nesting in December, or even earlier. In courtship display, male hovers in midair, giving buzzy song, then flies much higher; he then dives steeply toward the female, making a loud explosive popping sound at the bottom of the dive. Also buzzes back and forth in front of female in short shuttling flights. Nest site is variable, usually on a branch of tree or shrub, sometimes in vines, on wires, under eaves. Usually 4-25 feet above ground, can be lower or higher. Nest (built by female) is a compact cup of plant fibers and spider webs, lined with plant down and sometimes feathers, the outside camouflaged with lichens.
Audubon’s scientists have used 140 million bird observations and sophisticated climate models to project how climate change will affect this bird’s range in the future.
Zoom in to see how this species’s current range will shift, expand, and contract under increased global temperatures.
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California’s Central Valley and the Colorado River Delta are critical stopover sites for dozens of migrant species, according to new research.
While some local counts may be cancelled due to regional COVID-19 rules, many community scientists across the hemisphere will carry on one of the longest-running wildlife censuses in a socially distanced fashion.
Once restricted to southern California and the Baja Peninsula, the species' success is tied to an increase in flowery landscaping and nectar feeders.
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