Red-winged blackbirds nest in hayfields, marshes, and ditches while larger flocks can feel in fields and bottomlands. Redwings will migrate to the southern portion of the US during the winter. Yellow-headed blackbirds nest in agricultural fields, meadows, and pastures and will migrate farther south into Mexico. Brewer’s blackbirds will nest in a variety of habitats and will migrate to the central and southern plains states.
Females of all breeds of blackbirds will born the nests, typically in areas in low shrubs and trees. Nests are formed using plant stems, twigs, grasses, and hair or other softer materials. These nests are formed into a cup and are sometimes comprised of mud and manure to cement the shape.