Overlapping geographical ranges of mammals

This data began as geographical range data from the IUCN Red List for different mammal orders according to mammalian ranges in 2009. Using the "overlapping polygons" function in ArcGis 9.3, I converted the polygon shape files into numbers representing each species. Then calculated which species overlapped with one another. The resulting file has the species names, their corresponding polygon number, and then the polygon numbers, representing the other species, that overlap with the species of interest. Data is available for six orders of mammals. The IUCN Red List should be cited as the origin of this data:IUCN 2009. IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 07 September 2009.Converted by: Monroe MJ (2012) Does competition drive character differences between species on a macroevolutionary scale? Journal of Evolutionary Biology 25: 2341-2347