What is "dark-eyed junco"

n. common North American junco having gray plumage and eyes with dark brown irises [syn: slate-colored junco, Junco hyemalis]

The dark-eyed junco (Junco hyemalis) is the best-known 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.