Chestnut-bellied Hummingbird

The chestnut-bellied hummingbird (Saucerottia castaneiventris) is a Near Threatened species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is endemic to Colombia. == Taxonomy and systematics == The chestnut-bellied hummingbird was formerly placed in the genus Amazilia. A molecular phylogenetic study published in 2014 found that the genus Amazilia was polyphyletic. In the revised classification to create monophyletic genera, the chestnut-bellied hummingbird was moved by most taxonomic systems to the resurrected genus Saucerottia. However, BirdLife International's Handbook of the Birds of the World (HBW) retains it in Amazilia. The chestnut-bellied hummingbird is monotypic. == Description == The chestnut-bellied hummingbird is about 9 cm (3.5 in) long. Both sexes have a black bill with a red base to the mandible. The adult male has bronze-green upperparts and a chestnut tail. Its throat and upper breast are glittering green, the belly chestnut, and the undertail coverts chestnut with greenish edges. The female is similar but with a slightly paler belly and white bars near the end of some throat feathers. Immatures are similar to the female with rufous edges on the feathers of the neck and rump. == Distribution and habitat == The chestnut-bellied hummingbird appears to be restricted…