Remember ever going to the zoo to see a rhino when one was young? Well, your children might not be able to all of the rhinos.
The Western African black rhino was extinct in 2011,
Although I'm terrible at reasearching, I know 3 out of the 5 species are critically endangered as shown here:
http://www.worldwildlife.org/species/di ... ction=desc
I once heard a stream of rhino sub species all being extinct by poachers, disease, or disasters. Poor things, if we don't make any noise, rhinos can be extinct soon.