Ray Duffy reports: "I was scouting Mill Creek Marsh for the Meadowlands Birding Festival on Saturday. While passing the first fork along the paths, I came across a sparrow I am very confident was a Clay-colored Sparrow.
"It was by a Song Sparrow and the color difference were very clear. It had a well defined milar and a very obvious gray patch on the back of the neck. It got flushed a number of times by joggers but kept in the area. When I completed my loop it was in the same general area around 7:15 p.m.
Link to a pic is here. (Thanks, Ray!)