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| Chlorostilbon | |
|---|---|
|   | |
| Blue-tailed emerald | |
| Scientific classification   | |
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Class: | Aves | 
| Clade: | Strisores | 
| Order: | Apodiformes | 
| Family: | Trochilidae | 
| Tribe: | Trochilini | 
| Genus: | Chlorostilbon Gould, 1853 | 
| Type species | |
| Chlorostilbon prasinus  [1]  = Trochilus pucherani Gould, 1853 | |
| Species | |
| See text | |
Chlorostilbon is a genus of hummingbird in the family Trochilidae, known as emeralds (as are some hummingbirds in the genera Amazilia and Elvira ). A single species, the blue-chinned sapphire is variously placed in the monotypic genus Chlorestes or in Chlorostilbon. The taxonomy of the C. mellisugus superspecies is highly complex and, depending on view, includes 1-8 species. All species in this genus have straight black or black-and-red bills. The males are overall iridescent green, golden-green or bluish-green, and in some species the tail and/or throat is blue. [2] The females have whitish-grey underparts, tail-corners and post-ocular streak.
The genus Chlorostilbon was introduced in 1853 by the English ornithologist John Gould to accommodate a single species to which Gould gave the binomial name Chlorostilbon prasinus. [3] This taxon is now considered as a subspecies of the glittering-bellied emerald Chlorostilbon lucidus pucherani. [4] [5] [6]
The genus contains ten species: [6]
| Common name | Scientific name and subspecies | Range | Size and ecology | IUCN status and estimated population | 
|---|---|---|---|---|
| Garden emerald | Chlorostilbon assimilis Lawrence, 1861 | Costa Rica and Panama   | Size: Habitat: Diet: | LC | 
| Western emerald | Chlorostilbon melanorhynchus Gould, 1860 | Colombia and Ecuador.   | Size: Habitat: Diet: | LC | 
| Red-billed emerald | Chlorostilbon gibsoni (Fraser, 1840) Three subspecies 
 | Colombia and Venezuela   | Size: Habitat: Diet: | LC | 
| Blue-tailed emerald | Chlorostilbon mellisugus (Linnaeus, 1758) | Colombia east to the Guianas and Trinidad, and south to northern Bolivia and central Brazil   | Size: Habitat: Diet: | LC | 
| Chiribiquete emerald | Chlorostilbon olivaresi Stiles, 1996 | Colombia   | Size: Habitat: Diet: | LC | 
| Glittering-bellied emerald | Chlorostilbon lucidus (Shaw, 1812) | Argentina, Bolivia, Brazil, Paraguay, and Uruguay.   | Size: Habitat: Diet: | LC | 
| Coppery emerald | Chlorostilbon russatus (Salvin & Godman, 1881) | Colombia and Venezuela   | Size: Habitat: Diet: | LC | 
| Narrow-tailed emerald | Chlorostilbon stenurus (Cabanis & Heine, 1860) | Colombia and Venezuela   | Size: Habitat: Diet: | LC | 
| Green-tailed emerald | Chlorostilbon alice (Bourcier & Mulsant, 1848) | Venezuela   | Size: Habitat: Diet: | LC | 
| Short-tailed emerald | Chlorostilbon poortmani (Bourcier, 1843) Two subspecies 
 | Colombia and Venezuela   | Size: Habitat: Diet: | LC |