Junco hyemalis; Print; The dark-eyed junco (Junco hyemalis) is a species of the juncos; a genus of small grayish American sparrows. This bird is common across much of temperate North America and in summer ranges far into the Arctic. It is a very variable species; much like the related fox sparrow (Passerella iliaca); and its systematics are still not completely untangled.; 1700-1880