We are a commune of inquiring, skeptical, politically centrist, capitalist, anglophile, traditionalist New England Yankee humans, humanoids, and animals with many interests beyond and above politics. Each of us has had a high-school education (or GED), but all had ADD so didn't pay attention very well, especially the dogs. Each one of us does "try my best to be just like I am," and none of us enjoys working for others, including for Maggie, from whom we receive neither a nickel nor a dime. Freedom from nags, cranks, government, do-gooders, control-freaks and idiots is all that we ask for.
There are a handful of species of Juncos in North America. Most familiar is the Dark-Eyed Junco, formerly known as the Slate-Colored Junco. Why they changed that name is totally beyond me. Who can see their eye color?
Flocks of these sparrows - yes, they are in the sparrow family - are common around the US during migration and in winter, generally feeding on or near the ground, in fields, edges, and brush. The dual flash of white in their tail is an easy field mark in flight. They enjoy our bird feeders, and they do not mind snow at all.
They breed pretty much throughout Canada. Their arrival in the US in November, along with the White-Throated Sparrows, is a sign that winter is coming. They will begin to push north in March.
You can read more about these cheerful critters here.
It's because bird taxonomy is SNAFU'ed right now. Been that way for about ten years, ever since ornithologists got big into snitching DNA samples from birds and running genetic analyses on same. For juncos, DNA assays showed that five different 'species' of junco, which lived in different areas of North America, were actually subspecies of a single pancontinental species. Dark eyes is the one visible feature that all five had in common, hence "Dark-eyed Junco."