Masked Duck (Nomonyx dominicus)
(aka Oxyura dominica)

Brazilian name: marreca-de-bico-roxo

Male and female Masked Duck, Aguas de São Pedro, São Paulo, Brazil, August 2004 - click for larger image Brazil

The Masked Duck is distributed from Mexico and the West Indies into South America as far south as north-east Argentina. Although widespread this duck is not often seen because of its skulking habits. It is found in lakes, pools and marshes with lots of vegetation around and on the water.

Male Masked Duck, REGUA, Rio de Janeiro, Brazil, November 2006 - click for larger image It is the smallest of the "Stifftails". The male, seen in photo 2, has a sky blue bill like many of the family but has a large black "nail" at the tip. His black mask contrasts with the chestnut nape. The female, seen in photo 3, has two dark bands across the face.
Female Masked Duck, REGUA, Rio de Janeiro, Brazil, November 2006 - click for larger image The third bird in photo 4 might be a young male but males also have an eclipse plumage so it might be a male coming out of eclipse. Photo 5 shows what I take to be a family group with a male, a female, two immature males and one immature female. Photo 6 is of Masked Duck in flight showing the conspicuous white patch on the wings.
Masked Duck, REGUA, Rio de Janeiro, Brazil, November 2006 - click for larger image There is a recording of a call on xeno-canto.
Masked Duck, REGUA, Rio de Janeiro, Brazil, November 2006 - click for larger image
Masked Duck, REGUA, Rio de Janeiro, Brazil, November 2006 - click for larger image
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