The Sickle-winged Nightjar (Eleothreptus anomalus) is a species of nightjar in the Caprimulgidae family. It is found in Argentina, Brazil, Paraguay, and Uruguay. Its natural habitats are subtropical or tropical moist lowland forests, dry savanna, moist savanna, and swamps. It is becoming rare due to habitat loss.
- BirdLife International 2004. Eleothreptus anomalus. 2006 IUCN Red List of Threatened Species. Downloaded on 24 July 2007.
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