I had time only for a quick trip in the waning light to Skokie Lagoons. Was planning to check the picnic area but a big sparrow flock on the gravel path next to the parking lot distracted me. It was predominantly Juncos but every so often something else would catch my eye (CHIPPING, SONG, WHITE-THROATED, WHITE-CROWNED), so I kept looking... and then an immature HARRIS'S SPARROW jumped in to the group. It was pretty easy to stay on for the most part - even after being flushed by occasional bikers and hikers - it would return to feeding on the ground with the flock. I was eventually joined by Ben Sanders and another birder whose name I didn't catch. We all got great looks.