FWS R1 ES Greater Sage Grouse Historic Range

Prior 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 (<i>Centrocercus urophasianus</i>). Initially researched and compiled by Dr. Michael A. Schroeder, research biologist for the Washington State Department of Fish and Wildlife (1999).

19世纪欧洲殖民者定居北美西部之前，艾草松鸡（Greater Sage-grouse）的分布范围涵盖如今的13个美国州与3个加拿大省份，即亚利桑那州、加利福尼亚州、科罗拉多州、爱达荷州、蒙大拿州、内布拉斯加州、内华达州、北达科他州、俄勒冈州、南达科他州、犹他州、华盛顿州、怀俄明州，以及不列颠哥伦比亚省、阿尔伯塔省和萨斯喀彻温省（Schroeder等，2004）。在1800年之前，潜在可支撑艾草松鸡生存的艾草灌丛栖息地总面积约为120万平方千米（46万平方英里）（Schroeder等，2004，第366页）。本数据集图层展示了艾草松鸡（Greater Sage-grouse，*Centrocercus urophasianus*）潜在栖息地（即分布范围）的历史分布情况。本数据集最初由华盛顿州鱼类和野生动物部研究生物学家Michael A. Schroeder博士于1999年开展研究并编制完成。