Diamantina Sabrewing

The Diamantina sabrewing (Campylopterus diamantinensis) is a Near-threatened species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is endemic to southeastern Brazil. == Taxonomy and systematics == The Diamantina sabrewing was formerly considered to be a subspecies of the grey-breasted sabrewing (Campylopterus largipennis). In a 2017 paper Lopes et al. provided convincing evidence that it deserved species status. Starting in 2020 the South American Classification Committee of the American Ornithological Society and worldwide taxonomic systems agreed, recognizing the Diamantina sabrewing. It is monotypic. == Description == The Diamantina sabrewing is a large hummingbird, about 13.4 cm (5.3 in) long. Males weigh about 8.5 g (0.30 oz) and females 8.0 g (0.28 oz). The sexes have almost identical plumage including a white spot behind the eye. Their bill is long and slightly decurved; the maxilla is black and the mandible whitish with a brownish tip. Male's upperparts are dark grass green with a darker crown and their underparts dark gray. Their tail's central two pairs of feathers are metallic bronze-green. The other three pairs have bright bronze-green bases that grades through dark olive gray to a wide white tip. The female differs only by being a slightly duller…