-The Anna's hummingbird (Calypte anna) is a medium-sized hummingbird that's 3.9–4.3 inches long, with a wingspan of 4.7 inches and a weight of 0.1–0.2 ounces
-Iridescent bronze-green back, a pale gray chest and belly, and green flanks
-Adult males have a metallic green back, dark red head and throat, and a grayish colored breast
-Adult females have a green back, grayish breast, white throat with some red spots, and white tips on outer tail feathers
-Common in southern Arizona ... year-round residents
-Can be found in a wide variety of habitats, including open woods, shrubs, gardens, parks, streamside groves, chaparral, and open oak woodland areas
-Anna's hummingbirds are the only hummingbird to remain throughout southern Arizona in winter