The ruby-throated hummingbird is the most familiar of the species to North Carolinians. It is the only hummingbird that breeds east of the Mississippi River. Over the past decade a dozen other kinds of hummingbirds have been seen in North Carolina and in an unusual season--winter. What is not clear is whether the winter ranges of some hummingbirds are expanding or whether the birds have always been here in winter and not been noticed. The rufous hummingbird is the most abundant of the winter sightings. Pusser discusses the research on winter hummingbirds by bird biologist Susan Campbell, who is the only North Carolinian with a permit to band hummingbirds.