Lesser Scaup Aythya affinis
Negrelho-americano (Zarro-americano)
2011-12-01
Lagoa Azul, São Miguel
© Gerbrand Michielsen, Portugal
Birding Azores
4 Aythya ducks. Probably two marila (middle birds - left female and right male) and two affinis (left bird a male, and right bird a female).

  Enlarge picture.