The Brown Pintail (Anas georgica spinicauda), a dabbling duck of the genus Anas, is a sub-species of the Yellow-billed Pintail (Anas georgica). Its range includes Peru, Paraguay, Brazil, and Ecuador They also inhabit some of the subantarctic islands including South Georgia, which lends its name to the species. The nominate race A. g. georgica is thought to number between 1000 and 1500 pairs, and is found only in South Georgia. A. g. spinicauda is thought to number well over 110,000.
Factsheet: Yellow-billed Pintail Anas georgica