Efforts to aid greater sage-grouse survival, a candidate for Endangered Species Act protection, will be enhanced by a project coordinated at the Rocky Mountain Research in Rapid City, South Dakota. Researchers examined nesting ecology in the eastern edge of sage-grouse range, which includes North Dakota and South Dakota. Information about greater sage-grouse and its habitat affect decisions related to grazing and other public-land uses. Researchers found that while there is only a small amount of eastern habitat, it is of good quality and nest initiation rates and bird weights were higher than in other regions. Researchers also found that nests are nearly always beneath sagebrush, and that hatch rates improve when tall grass surrounds the brush. Grass also supports the insects that are a critical food source for sage-grouse in the first weeks of life. These research findings will be helpful in grassland management. The Rocky Mountain Research Station Rapid City Lab partnered with the U.S. Bureau of Land Management, the North Dakota Game and Fish Department and South Dakota State University to conduct these studies.