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Ron Fredrick
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A male Anna's Hummingbird (Calypte Anna), surrounded by nectar-filled blooms
A male Anna's Hummingbird (Calypte Anna), surrounded by nectar-filled blooms

Photographed in the UCSC Arboretum, Santa Cruz, USA - Seated, no blind

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Every springtime, Anna's and Allen's Hummingbirds descend on the UCSC Arboretum for courtship/breeding. I found this Anna's to be particularly photogenic.
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From Wikipedia: Anna's hummingbird (Calypte anna), a medium-sized hummingbird native to the west coast of North America, was named after Anna Masséna, Duchess of Rivoli. In the early 20th century, Anna's hummingbirds bred only in northern Baja California and southern California. The transplanting of exotic ornamental plants in residential areas throughout the Pacific coast and inland deserts provided expanded nectar and nesting sites, allowing the species to expand its breeding range.

During hovering flight, Anna's hummingbirds maintain high wingbeat frequencies accomplished by their large pectoral muscles via recruitment of motor units. The pectoral muscles that power hummingbird flight are composed exclusively of fast glycolytic fibers that respond rapidly and are fatigue-resistant.

Anna's hummingbirds are found along the western coast of North America, from southern Canada to northern Baja California, and inland to southern and central Arizona, extreme southern Nevada and southeastern Utah, and western Texas. They tend to be permanent residents within their range, and are very territorial. However, birds have been spotted far outside their range in such places as southern Alaska, Saskatchewan, New York, Florida, Louisiana, and Newfoundland.

Anna's hummingbirds have the northernmost year-round range of any hummingbird. During cold temperatures, Anna's hummingbirds gradually gain weight during the day as they convert sugar to fat. In addition, hummingbirds with inadequate stores of body fat or insufficient plumage are able to survive periods of subfreezing weather by lowering their metabolic rate and entering a state of torpor.



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Taken on: April 30, 2019
Sets appears in:   • Birds    • USA Birds    more » • Hummingbirds    • Explored    « less
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Camera: Canon EOS 5D Mark IV, f/9.0, 1/2000 sec, 500mm, ISO 2000 (more info) (hide info)
Camera: Canon EOS 5D Mark IV
Aperture: f/9.0
Exposure Time: 0.001 sec (1/2000)
Focal Length: 500mm
ISO: 2000
Exposure Bias: 0 EV
Flash: Off, Did not fire
Exposure Program: Manual
Exposure Mode: Manual
Metering Mode: Multi-segment
White Balance: Auto
Color Space: sRGB
Software: GraphicConverter 11 (11.1.2)
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