Diligent students of Maggie's Farm have had the chance, over the years, to become familiar with many of the common birds of North America - or at least of the Eastern US. The common winter sparrows around my parts (not including Junco, which is a sparrow):
In winter at my feeder, I mainly see Song Sparrow
and White Throated Sparrow:
In some winters, we get a surge of Fox Sparrows, but not this year. This year, though, I have seen more Tree Sparrows than ever (that's the American Tree Sparrow, not the Eurasian):
The Chipping Sparrow is common here in the summer, but migrates south. I rarely see a Field Sparrow anymore these days. No idea why. Never see White Crowned Sparrow at my feeder either.
This is the common urban pest, once called the English Sparrow (they were a nasty import from Old Blighty):