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The Xingu antbird -LRB- Willisornis vidua -RRB- , also known as the Xingu scale-backed antbird , is a species of antbird from the south-eastern Amazon in Brazil .. Willisornis. Willisornis. antbird. antbird. Amazon. Amazon Rainforest. Brazil. Brazil. scale-backed antbird. scale-backed antbird. Until 2011 , it was usually included as a subspecies of the scale-backed antbird .. antbird. antbird. subspecies. subspecies. scale-backed antbird. scale-backed antbird. Its English name refers to the Xingu River .. Xingu River. Xingu River. In addition to the nominate subspecies , it includes the subspecies '' W. v. nigrigula .. subspecies. subspecies. nominate subspecies. nominate subspecies