- The American Field Sparrow's range is most of the eastern U.S. where it is mostly a year-round resident. Small and long-tailed, wth a plain face which gives it an innocent expression. It prefers brushy places, overgrown meadows with many bushes.
- Diet is more than 90% seeds in winter, mainly small seeds of grasses. Also eats many seeds in summer, but insects make up more than 50% of summer diet. Nestlings are fed spiders and insects, with many grasshoppers fed to larger young.
- Site is on or near the ground in clumps of grass or in low bushes or saplings fro 3-7' above the ground. Nest, built by the female, is an open cup woven of grasses.
- 3-5, whitish to pale bluish white. Incubation is by the female, 10-12 days.
- Both parents feed the nestlings. Young leave after 7-8 days after hatching, able to fly about a week later. 2 broods per season. Female may begin a second nestling attempt, leaving the male to finish raising the first brood.