The fox sparrow (Passerella iliaca) has both a red (pictured) and gray plumage morph. The markings are similar, with thick triangular spotting and streaking on the breast and flanks, a thin eye ring, and a smudge on the cheek. The two-toned bill with a darker upper mandible is common to both plumage variations. The red form is most common in eastern populations, while the gray form is a western variety.

Photo © Dominic Sherony