1) Large bird of the West 
The sage grouse (Centrocercus urophasianus) is an American grouse which inhabits the dry plains of the western states, and feeds upon the ' sage brush'. It has a long, pheasant-like tail; the upper surface of the body is mottled, the lower black apart from a white chest. At the sides of the neck in the male are inflatable air-sacs, which are disten...
[n] - large grouse of sagebrush regions of North America
sage hen noun large grouse of sagebrush regions of North America