Although Blaine County, Idaho, has a small population (the largest city is Hailey, pop. 6000), its municipal code includes several environmental protections, including two overlay districts. The wildlife overlay district is designed to protect migratory routes of the major species in the county, particularly elk, deer, and antelope, by restricting residential development and requiring residents to work closely with the Idaho Department of Fish and Game. The scenic highway overlay district was written in part to prevent wildlife from being trapped by fences and development along the highway. It is also designed to protect the natural aesthetics of the area, particularly scenic views, by preventing development within a set distance on either side of Highway 75.