By Cormac McGinn
The last male northern white rhino has died at 45 in Kenya.
That leaves only two females of his subspecies left in the world.
<blockquote class="twitter-tweet" data-lang="en"><p lang="en" dir="ltr">It is with great sadness that Ol Pejeta Conservancy and the DvÅ¯r Králové Zoo announce that Sudan, the world’s last male northern white rhino, age 45, died at Ol Pejeta Conservancy in Kenya on March 19th, 2018 (yesterday). <a href="https://twitter.com/hashtag/SudanForever?src=hash&ref_src=twsrc%5Etfw">#SudanForever</a> <a href="https://twitter.com/hashtag/TheLoneBachelorGone?src=hash&ref_src=twsrc%5Etfw">#TheLoneBachelorGone</a> <a href="https://twitter.com/hashtag/Only2Left?src=hash&ref_src=twsrc%5Etfw">#Only2Left</a> <a href="https://t.co/1ncvmjZTy1">pic.twitter.com/1ncvmjZTy1</a></p>— Ol Pejeta (@OlPejeta) <a href="https://twitter.com/OlPejeta/status/975972162623418368?ref_src=twsrc%5Etfw">March 20, 2018</a></blockquote>
<script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>
'Sudan' was being treated for age-related complications that led to muscle changes and extensive skin wounds.
In the last 24 hours, his condition worsened and he was unable to stand up.
The death of 'Sudan' has resulted in the extinction of his subspecies.
However scientists have gathered his generic material and are working on techniques to preserve the subspecies.