There's eight links of "related content" underneath this article. Not all about this particular species, but pretty easy to filter through to see what's directly related:
It's painting a pretty dismal picture altogether. I guess conservation efforts were too little, too late, with the remaining population already too small and too aged to ever offer much hope for success. :(
In 2007, there were 14 of these rhinos left, 4 wild and 10 in captivity: http://www.theguardian.com/environment/2007/mar/04/conservat... - this article also cited a number of 30 back in 2000.
In October 2014, the second-to-last male died at the relatively young age of 34, leaving just 6 and removing the last realistic hope for breeding: http://www.theguardian.com/environment/2014/oct/18/northern-...
In December 2014, the next-to-last male died, of old age, leaving just 5: http://www.theguardian.com/environment/2014/dec/15/northern-...
It's painting a pretty dismal picture altogether. I guess conservation efforts were too little, too late, with the remaining population already too small and too aged to ever offer much hope for success. :(