Breeding season lasts from February into late August. Clutch size usually 5, range 3-7. Incubation lasts 13-15 days. Altricial young tended by both parents. Roosts on ground in small groups.
Raptors commonly prey on adults, and a variety of avian and mammalian predators prey on young.
Forms larger flocks in winter. Life histories of North American blackbirds, orioles, tanagers, and allies. Bryant, H. C. 1914. Creighton, P. D. 1974. Nest predation and interference by western meadowlarks.