No additional data found. In California, frequents pond and lake margins, wet fields, and especially intertidal mudflats. Yearlong, circadian activity. Migrates at night. In estuarine environments, may feed nocturnally when tidal conditions permit.
Numbers remain high on coastal estuaries through winter.
Northward spring migration apparently takes place in March and April. After the eggs hatch, adults and chicks leave the nest territory to feed in wet marshes. Male defends a nesting area on snow-free tundra. Arrives on breeding grounds in late May and early June. Egg laying begins in early June and continues until early July, when most eggs hatch.