Hummingbirds are capable of torpor, which is evolutionarily similar to hibernation. She lays two tiny eggs, which will hatch in a couple of weeks, and the hatchlings begin to fly a few weeks after hatching. After mating, the male leaves the female, who seeks a secure place with nearby food sources to make her nest. Mating is the only time that male Anna’s actually sing. The male Anna’s initiates mating by putting on a colorful acrobatic, diving display, chirps loudly, and sings. Migration and BreedingĪnna’s migrate to British Columbia and Arizona in winter to breed in mountainous or shrubby areas. DistributionĪnna’s are primarily distributed along the West coast of the U.S., from Canada to Baja, California, but also they have been sighted in Alabama, Alaska, Arizona, Arkansas, Colorado, Florida, Georgia, Idaho, Kansas, Louisiana, Mississippi, Missouri, Montana, Nevada, New Mexico, Pennsylvania, Tennessee, Texas, and Utah. The adult female is less colorful, consisting of green, gray and white plumage, and outer tail feathers tipped with white. The adult male’s vivid plumage is metallic bronze and green on the back, with a bright red crown and gorget, and a light gray breast.
Anna’s are approximately 11cm/4 inches long when mature. Duchess Anna Messena of Rivoli was the inspiration for this hummingbird’s scientific name: Calypte anna.
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