Hispaniolan emerald

The Hispaniolan emerald (Riccordia swainsonii) is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is endemic to the island of Hispaniola, which is shared by the Dominican Republic and Haiti.

Male Hispaniolan emeralds are 9.5 to 10.5 cm (3.7 to 4.1 in) long and females 8.5 to 9.5 cm (3.3 to 3.7 in). The species weighs between 2.5 and 5 g (0.088 and 0.18 oz). Both sexes have a small white spot behind the eye. Males have a bill whose mandible is red and the maxilla black, and that is slightly decurved at the outer end. Its forehead, crown, and cheeks are dull dark brown; the rest of its upperparts and flanks are dark green with a bronze tinge and the uppertail coverts are dark green. Its throat is iridescent green with a large black patch below it. The rest of its underparts are a darker green than the upperparts with dark green undertail coverts. The tail is deeply forked and dark brown. The female's bill is more deeply decurved than the male's. Its head and upperparts are like the male's. Its underparts are gray that is darker on the belly and undertail coverts. The outermost pair of tail feathers have a gray base, a wide dark brown band near the end, and a white tip. The next pair inward is mostly dark grass green becoming black at the end. The inner three pairs are green.