White-tailed hillstar

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White-tailed hillstar
Urochroa bougueri (Colibrí nagüiblanco) (14144500332).jpg
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Apodiformes
Family: Trochilidae
Genus: Urochroa
Gould, 1856
Species: U. bougueri
Binomial name
Urochroa bougueri
(Bourcier, 1851)

The white-tailed hillstar (Urochroa bougueri) is a species of hummingbird in the Trochilidae family, and the only member of the genus Urochroa. It is found in humid montane forest in southern Colombia, Ecuador, and northern Peru. It has two subspecies, the nominate on the west Andean slope, and leucura on the east Andean slope. The two differ strongly, most conspicuously in that the former has a broad orange malar, which the latter lacks. Both have a straight black bill, greenish upperparts, a blue throat, grey belly, and extensive white to the tail. Although sharing the name hillstar with the members of the genus Oreotrochilus, they are quite different and not closely related.