Green-and-white Hummingbird

The green-and-white hummingbird (Elliotomyia viridicauda) is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is endemic to Peru. == Taxonomy and systematics == The green-and-white hummingbird has at various times been placed in genera Leucippus and Elliotia, and until 2014 in Amazilia. A molecular phylogenetic study published in 2014 found that Amazilia was polyphyletic. In the revised classification to create monophyletic genera, the green-and-white hummingbird was placed by most taxonomic systems in a new genus Elliotomyia. However, BirdLife International's Handbook of the Birds of the World (HBW) retains it in Amazilia. The green-and-white hummingbird shares genus Elliotomyia with the white-bellied hummingbird (E. chionogaster). It is monotypic. == Description == The green-and-white hummingbird is 10 to 11 cm (3.9 to 4.3 in) long. Males weigh about 6.0 g (0.21 oz) and females about 5.5 g (0.19 oz). Both sexes have a medium length straight bill with a blackish maxilla and a reddish mandible with a dark tip. Adult males have brilliant green to bronze-green upperparts and flanks. Their undersides are whitish from the chin to the undertail coverts with greenish spots on the sides of the chin and throat and sometimes some golden-green on the coverts.…