"Virginia Opossum – Didelphis virginiana – NatureWorks" "Virginia Opossum – Didelphis virginiana – NatureWorks" http://www.nhptv.org/natureworks/opossum.htm "Virginia Opossum – Didelphis virginiana – NatureWorks" http://www.nhptv.org/natureworks/opossum.htm harmless Virginia opossum (Didelphis virginiana) harmless