Culling, or legal, selective hunting, to control the poaching of wildlife populations might not really be an effective strategy, says a University of Wisconsin-Madison study.
The World Wildlife Fund had rejoiced that a rare female rhino was spotted, but she died a few weeks later.
Cecil has made Prince Harry aware of his responsibilities towards animal rights.
Though it is a year since 46 countries signed up to eliminate trade in horn and ivory, rhinos and elephants are heading towards extinction.
