abstract:The Lesser Scaup (Aythya affinis) is a small North American diving duck that migrates south as far as Central America in winter. It is colloquially known as the Little Bluebill or Broadbill because of its distinctive blue bill.
Lesser ScaupAythya affinis, Northern Pintail Anas acuta, and several sea ducks are showing troubling declines, butmostgeese are increasing dramatically and manyduckshaveheld steady.