The Duke of Cambridge said more needs to be done to tackle poaching and the illegal trade of elephant ivory and rhino horn after analysis showed such crimes have reached "shocking levels".
Prince William, who addressed the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) conference in Thailand via video, said: "As we enter 2013 the world's natural resources are under threat as never before.
"We know from the data and analysis presented to [The CITES meeting in Thailand], that the illegal killing of the African elephant and rhino, and the related illegal trade of ivory and horn, has reached shocking levels in the past few years."
An international conference to halt the rise in ivory and rhino horn poaching ended in Bangkok, with campaigners feeling 'disappointed'.
Wildlife campaigners believe an opportunity to halt the rise in ivory and rhino horn poaching has been missed at the CITES conference.
There appears to be a perfect storm and animals which have been on the planet for millions of years may be wiped out.