Nest is concealed in low vegetation, often on a hummock, usually near a pond or lake, in tundra or the northern forest zone. No additional data found. Found on bays, estuaries, and ocean near shore. For nesting, requires ground cover for nest concealment, near a lake or pond. Yearlong, mostly diurnal activity.
Migration is nocturnal.
The California wintering population migrates to breeding grounds in Alaska, and is absent from May to September. No additional information found. No evidence of territoriality. Nests usually dispersed widely. Pairs apparently form in winter, and nesting begins in late May or June.