The Calliope Hummingbird ( Selasphorus calliope) is a very small hummingbird native to the United States and Canada and, during winter, Central America. It was previously considered the only member of the genus Stellula, however recent evidence suggests placement in the genus Selasphorus. This bird was named after the Greek muse Calliope.

The calliope hummingbird ( Selasphorus calliope) (pronunciation kə-ˈlī-ə-pē) is the smallest bird native to the United States and Canada. It has a western breeding range mainly from California to British Columbia, and migrates to the Southwestern United States, Mexico, and Central America for its wintering grounds.