Mammals are divided into two subclasses based on reproductive techniques: egg laying mammals (the monotremes), and live birth mammals. The second subclass is divided into two infraclasses: pouched mammals (the marsupials) and placental mammals. This is a sub-list of the list of mammals of Australia. Conservation status listed follows the IUCN Red List of Threatened Species (v. 2013.2; data current at 5 March 2014):EX - extinctEW - extinct in the wildCR - critically endangeredEN - endangeredVU - vulnerableNT - near threatenedLC - least concernDD - data deficientNE - not evaluated