Over most of the continent, Robins summer where there are trees for nest sites and mud for nest-builing material. The Robin's song is the earliest one heard in spring and summer, beginning just before the break of dawn.
Females does most of nest building. Site is a horizontal branch of a tree or shrubs, usually 5-25' above ground. Also nests on ledges of houses, barns, bridges. Nest is a cup of grasses, twigs, debris, worked into a solid foundation of mud, lined with fine grasses and plant fibers.