Araucana

The Araucana (Spanish:Gallina Mapuche) is a breed of chicken originating in Chile. This chicken has been a subject of controversy regarding the possibility that the breed was developed from birds that arrived prior to Old World contact, which would make it the only chicken breed native to the Americas. It is well known for its blue eggs, which is caused by a DNA retrovirus that occurred sometime early in domestication. In the United States it may be known as the South American Rumpless, and may be confused with other fowl, especially the Ameraucana and Easter Egger.