Female House Sparrow, photo by Dave Kinneer. The colors in this outdoor shot are more true than some of the others on this page. Notice the beak color fo the female, chunky body style (although the bird is puffed up), and pink legs.
This is a hatch-year field sparrow, sex unknown. Three major field marks can clearly be seen on our bird. It has a rusty cap, pinkish bill, and prominent white eye ring. Those three characters should serve to separate it from any other sparrow that you'll see in these parts. Young White-crowned Sparrows can suggest a Field Sparrow, but they are proportionately much larger and bulkier, among other differences.