I thought perhaps, that there might be a male Cassin’s with the two females that showed up at my feeders. This is the male that caught my eye – large bill, pink on the chest, fine streaking on the flanks. Pretty subtle differences when compared to the House Finch.
The Sibley’s Guide illustrations show a narrow white bar at the base of the bill, this bird has the band. The other similar finches, House and Purple, are shown in the illustrations without the little band. It may not mean anything.