This morning there was a Lark Sparrow in our driveway when I walked out to get the paper.  Steve Gent reported another on IBET from Colored Sands FP.  I see the start of a comment pending posting on this list that there was another seen at Sugar River Alder FP, which is just N of Colored Sands FP.  I found yet another west of Rochelle in a corn field east of the intermodal ponds on IL 38.  The sandy soils in the Colored Sands/Sugar River Alder area make those the best places to find this species in Winnebago County (I believe that they nest at the sand prairie on the north side of Sugar River Alder) , and they can also be found along Yale Bridge Road because of the sandy soils there.  The Christmas tree farms usually have them each summer.  The conifers like the same sandy soils.