The Natural Resource Publication series addresses natural resource topics that are of interest and applicability to a broad readership in the National Park Service and to others in the management of natural resources, including the scientific community, the public, and the NPS conservation and environmental constituencies. Manuscripts are peer-reviewed to ensure that the information is scientifically credible, technically accurate, appropriately written for the intended audience, and is designed and published in a professional manner.

This report summarizes the results of the 2003 inventory of mammals, summarizes historic information, and contains brief accounts of each species present or expected to occur at Craters of the Moon National Monument and Preserve (CRMO). Information on species that are possible but unlikely to occur at CRMO is also provided.