And then there were three

A northern white rhino has died in a zoo in the US, leaving 3 left in the world (in Kenya).

The remaining ones are locked away in a preserve, so that men with small penises will not kill them and consume their horns.

http://www.olpejetaconservancy.org/wildlife/rhinos/northern-white-rhinos/

How many is enough?    Consider supporting the Ol Pejeta Preserve.