Brent Goose
Branta bernicla

Brent Geese are common around the coasts of north-estern Europe in winter and they move back to Scandanavia in the summer. However, they are very rare in Switzerland as free-flying birds. This one is a long-resident escapee near Bern.
 

1: River Aare, Wohlensee, Bern, 11/04/2009.