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Range DescriptionButeogallus coronatus has a very large range in Brazil (from Maranhão and Bahia west to Mato Grosso and south to Rio Grande do Sul), Bolivia (Beni and Santa Cruz), Uruguay (no records since before 1933 and presumably extirpated), Paraguay (has been recorded throughout), and Argentina (Jujuy to south Buenos Aires, Rio Negro and La Pampa with an accidental record in Neuquén [Giai 1952, Gonnet and Blendinger 1998, Delhey and Carrete 1999], and an 1879 record from Chubut [R. Pereyra in litt. 2012]). Trends are difficult to detect in low density populations but, given the severity of threats, it seems likely that a significant loss of numbers is occurring. In Paraguay it appears to be most numerous in the Cerrado of Concepción department; it also continues to be recorded in humid Chaco habitat with a new record in Ñeembucú department and there are records, including juvenile birds, from sites in dry Chaco (H. del Castillo in litt. 2012).