Some ways to identify the biogeographic regions are:They must be affluent in the majority of living taxaThey must be found upon great geographic divisionsThe presence or the absence of strange species, genera or families must make them distinctive. An example of a biogeographic region includes an endemic butterfly species residing in the continental area of the Western Mediterranean reflects the biogeographic region. Endemic species with limited distributions renders a significant contribution in describing biogeographic regions. An adult of Coenonympha corinna elbana living in a confined continental and insular region of the Western Mediterranean.