Comments: ALL SEASONS: Lakes, rivers, bogs, moors, grasslands, swamps, and coastal marshes. NON-BREEDING: seacoasts, estuaries, and bays (AOU 1983). In Europe, also city parks and agricultural fields (Nikula 1993). Strongly attracted to sewer outfalls (Nikula 1993). BREEDING: Nests usually on ground along seacoast, coastal islands, or in freshwater marshes (Terres 1980).