Is Sibley Wrong?

The Sibley Guide To Birds Has Clearly Misidentified The Dark-Eyed Junco
From The Onion

I don't understand it. How could it have happened a third time? They've had two opportunities to correct it. But there it is, once again. The Sibley Guide To Birds, third printing, page 488: "The dark-eyed junco, a familiar visitor to wintertime bird feeders throughout much of North America, is a species of the junco genus of American finches."