Flock of Barnacle Geese (Branta leucopsis) in flightEgyptian Goose (Alopochen aegyptiacus), invasive exotic species landing on lake shoreMute swan (Cygnus olor) male swimming on lake and showing dominant aggressive posture, GermanyRed-crested pochard (Netta rufina) male swimming in lake, GermanyCommon goldeneye (Bucephala clangula) male displaying on lake, GermanyTufted Duck (Aythya fuligula) male resting on ice of frozen shore of pond in winter, GermanyGreylag goose / graylag goose (Anser anser) calling while taking off from lake, GermanyMallard / Wild Duck (Anas platyrhynchos) flapping its wings on lake, GermanyCommon pochard (Aythya ferina) male in flight, Germany