Primarily a marsh-inhabiting bird, this blackbird feeds on emerging aquatic insects during the summer. In the winter, large flocks move from often swampy night roosts to spend time foraging in agricultural fields, cow lots and other open areas for seeds. Each breeding male can have up to 14 females and nests on his territory depending on the abundance of food. The nest is woven from grass and sedge and placed in vegetation just above the water\s surface. The bright red epaulet of the male is used to advertise dominance and attract females.