The White-Sided Hillstar (Oreotrochilus leucopleurus) is a species of hummingbird in the Trochilidae family. It is found in Argentina, Bolivia, and Chile. Its natural habitats are subtropical or tropical high-altitude shrubland and subtropical or tropical high-altitude grassland.
- BirdLife International 2004. Oreotrochilus leucopleurus. 2006 IUCN Red List of Threatened Species. Downloaded on 10 July 2007.
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