The 2001 issue of the Gap Analysis Bulletin is the tenth in a series of annual publications produced by the National Gap Analysis Program. Gap Analysis Bulletin No. 10 features 13 articles on various aspects of gap analysis methods and results. Topics addressed include land cover mapping, animal distribution modeling1 and applications. The bulletin also includes a section on the current status of each GAP state project. This issue also contains summaries of two final reports from recently completed GAP state projects.