American sparrows build nests on the ground, in clumps of grass, in bushes, or in low trees, but seldom far from the ground. A sparrow's nest is a compact, well-built, open structure made of grasses, plant fibers, and sometimes small twigs. The female lays four or five white eggs marked with reddish-brown. The eggs hatch in 11 to 14 days, and the young leave the nest 8 to 10 days later. Both the male and the female care for the young.
American sparrows live almost everywhere.
For example, song sparrows live in bushy areas, fox sparrows in forests, swamp sparrows in marshes, vesper sparrows in prairies, and sage sparrows in deserts. Those sparrows that breed in northern North America may migrate south in winter, some as far as Mexico and Central America. However, even among migrant species, older males often spend the winter near their breeding area. The common house sparrow was brought to America from Europe in 1853. It now lives in most of the populated areas of Canada, the United States, Central America, and western South America.