Greater Scaup

      Aythya marila

      Information

      The Greater Scaup breeds further north than its relatives: Tufted Duck and Common Pochard. It generally winters on open sea with concentrations in the Baltic and along the North Sea coasts. Small numbers occur in winter on the large lakes north of the Alps, where they often socialise with other diving ducks. The Greater Scaup is often overlooked because of its similar colour to the much more widespread Tufted Duck.

      Voice

      Status (in CH)
      regular, scarce migrant and winter visitor, extremely rare summer visitor
      Annual cycle
      The bar on the top line indicates during which seasons the species can be observed regularly in Switzerland. There can be great seasonal fluctuations of numbers. The middle bar indicates the typical migration seasons of a species. The bottom bar indicates the period during which the species normally breeds. As a rule it spans the period from egg-laying to fledging of the young.
      Annual cycle
      Annual cycle

      Facts

      Population size in Switzerland (Pairs)
      -
      Migration behaviour
      short- to long-distance migrant
      Diurnal/nocturnal migrant
      Nocturnal migrant
      Length (cm)
      42-51
      wing span (cm)
      71-80
      Weight (g)
      700-1100
      Nest site
      ground
      Food
      mussels, plants
      Group
      Wildfowl
      Habitat
      lakes, rivers & streams
      Distribution
      Distribution
      Distribution