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Kingdom: Animales
Phylum: Chordata
Class: Aves
Order: Apodiformes
Family: Trochilidae
Genus: Calypte
Species: C. anna
They are 3.9 TO 4.3 in long with a wingspan of 4.7 inches and weigh 0.1-0.2 oz or (2.8-5.7g).
They have an iridescent bronze-green back, a pale gray chest and belly, and green flanks. Their bills are straight, long, and slender. The male has an iridescent crimson-red to reddish-pink crown and gorget, which can appear more brown or gray if not in direct sunlight. Females are usually less colorful and smaller than the males. They also have a dull green crown, gray throat, and a gray chest.
There are no subspecies of the Anna's Hummingbird however in their genus there is one other type of hummingbird, the Costa's hummingbird (Calypte costae).
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.
Typical yearly rainfall on the western coast is anywhere from 30-90 inches depending where on the west coast they are.
It is very common for these hummingbirds to be found all along the west coast of the United States of America year round. It is uncommon to find them in the winter in Western Canada, but it is common to find them in northwestern Mexico and Baja California.
When it gets cold outside they go into topor. When they are in topor, their body temperature can go as low as 41 degrees F.
They are found exclusively in North America.
Because they live in such a large range they cross multiple vegetation zones. From different types of forests to the dessert. They also come in contact with all the plants and animals throughout all the zones.
They are not very social animals.
They aggressively defend their territories and frequently have conflicts with others.
Males and females only come together to mate. They are not monogamous. Both sexes likely mate with more than one individual per season. Only the females care for the young. when males are not feeding or mating, they often perch fairly high in a bush or tree, noisily chattering.
The breeding season begins in December and usually lasts until May of June. Females will lay a clutch of only two white eggs and will produce only one brood per season. The hummingbird eggs are roughly the size and shape of a small jellybean. the hatchlings will remain in the nest for three weeks.
Males perform a spectacular courtship dive to females, at the bottom of which they abruptly produce a loud "CHIRP" sound with their tail-feathers.
They typically sit on their eggs for 14-19 days. They reach sexual maturity at a year old.
Causes of death: various illnesses and predators like tree snakes, western scrub-jays, American kestrels, roadrunners, and curved-billed thrashers.
They compete with other animals for survival and for mates.
There conservation status is of least concern.
Humans are destroying the habitat of the anna's hummingbird which is causing them to expand into new ranges. but it does not impact their populations.
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