U.S. Fish & Wildlife ServicePrior to European settlement of western North America in the 19th century, sage-grouse occurred in an area that today would cover 13 States and 3 Canadian provinces—Arizona, California, Colorado, Idaho, Montana, Nebraska, Nevada, North Dakota, Oregon, South Dakota, Utah, Washington, Wyoming, British Columbia, Alberta, and Saskatchewan (Schroeder et al. 2004). Sagebrush habitats that potentially supported sage-grouse occurred over approximately 1.2 million square kilometers (460,000 square miles) before 1800 (Schroeder et al. 2004, p. 366). This layer depicts this historic distribution of potential habitat, or range, of the Greater Sage-grouse ( Centrocercus urophasianus ). Initially researched and compiled by Dr. Michael A. Schroeder, research biologist for the Washington State Department of Fish and Wildlife (1999).ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/c5dec1f5d1a74bef9260a71f09256d7e_0engU.S. Fish and Wildlife Service Open DataPublicFWS R1 ES Greater Sage Grouse Historic Range [United States]Web servicesUnited StatesLast Modified: 2017-05-16