The Sharp-tailed Grouse, Tympanuchus phasianellus (previously: Tetrao phasianellus), is a medium-sized prairie grouse

Grouse

Grouse are a group of birds from the order Galliformes. They are sometimes considered a family Tetraonidae, though the American Ornithologists' Union and many others include grouse as a subfamily Tetraoninae in the family Phasianidae...

. It is also known as the sharptail, and is known as "fire grouse" or "fire bird" by Native American Indians due to their reliance on brush fires to keep their habitat open.
http://www.dnr.state.mn.us/snapshots/birds/sharptailedgrouse.html
The Greater Prairie-chicken, Lesser Prairie-chicken, and Sharp-tailed Grouse make up the genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 Tympanuchus

Tympanuchus

Tympanuchus is a small genus of birds in the grouse family. It contains three species:* Sharp-tailed Grouse, Tympanuchus phasianellus* Greater Prairie-Chicken, Tympanuchus cupido* Lesser Prairie-Chicken, Tympanuchus pallidicinctus...

, a genus of grouse found only in North America

North America

North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

.