Sagebrush cover types other than big sagebrush can fulfill greater sage-grouse habitat requirements; in fact, the grouse may prefer other sagebrush cover types to big sagebrush. Greater sage-grouse in Antelope Valley, California, for example, use black sagebrush ("A. nova") cover types more often than the more common big sagebrush cover types. Hens with broods on the National Antelope Refuge in Oregon were most frequently found (54–67% of observations) in low sagebrush ("A. arbuscula") cover. Desert shrub habitat may also be used by greater sage-grouse.