%0 Journal Article %T The Sixth Rhino: A Taxonomic Re-Assessment of the Critically Endangered Northern White Rhinoceros %A Colin P. Groves %A Prithiviraj Fernando %A Jan Robovsky %J PLOS ONE %D 2012 %I Public Library of Science (PLoS) %R 10.1371/journal.pone.0009703 %X The two forms of white rhinoceros; northern and southern, have had contrasting conservation histories. The Northern form, once fairly numerous is now critically endangered, while the southern form has recovered from a few individuals to a population of a few thousand. Since their last taxonomic assessment over three decades ago, new material and analytical techniques have become available, necessitating a review of available information and re-assessment of the taxonomy. %U http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0009703