Violet-crowned Hummingbird

The violet-crowned hummingbird (Ramosomyia violiceps) is a hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is found in Mexico and the southwestern United States. == Taxonomy and systematics == The violet-crowned hummingbird was formerly placed in the genus Amazilia. A molecular phylogenetic study published in 2014 found that Amazilia was polyphyletic. In the revised classification to create monophyletic genera, the violet-crowned hummingbird was one of three species moved to the resurrected genus Leucolia by some taxonomic systems. However, a study published in 2021 showed that Leucolia was not available because of the principle of priority. The authors proposed the new genus Ramosomyia and in mid-2022 it was adopted by the North American Classification Committee of the American Ornithological Society and the International Ornithological Committee. As of that date the Clements taxonomy retains the species in Leucolia and BirdLife International's Handbook of the Birds of the World in the earlier Amazilia. The violet-crowned hummingbird has two subspecies, the nominate R. v. violiceps and R. v. ellioti. == Description == The violet-crowned hummingbird is 10 to 11.5 cm (3.9 to 4.5 in) long and weighs 5.1 to 5.8 g (0.18 to 0.20 oz). Both sexes of both subspecies have a…