<P> The western black rhinoceros ( Diceros bicornis longipes ) or West African black rhinoceros was a subspecies of the black rhinoceros , declared extinct by the IUCN in 2011 . The western black rhinoceros was believed to have been genetically different from other rhino subspecies . It was once widespread in the savanna of sub-Saharan Africa , but its numbers declined due to poaching . The western black rhinoceros resided primarily in Cameroon , but surveys since 2006 have failed to locate any individuals . </P>
<P> The western black rhinoceros ( Diceros bicornis longipes ) or West African black rhinoceros was a subspecies of the black rhinoceros , declared extinct by the IUCN in 2011 . The western black rhinoceros was believed to have been genetically different from other rhino subspecies . It was once widespread in the savanna of sub-Saharan Africa , but its numbers declined due to poaching . The western black rhinoceros resided primarily in Cameroon , but surveys since 2006 have failed to locate any individuals . </P>
when did the western black rhino become extinct
when did the western black rhino become extinct
2011
2011