"Unprecedented demand, wildlife crime and loss of habitat is destroying entire species and the building blocks of the ecosystem that we all rely upon," said John Scanlon, head of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES).
He was speaking at the start of a global conference of 1,200 delegates in the Kenyan capital Nairobi organised by the UN Environment Programme (UNEP) to discuss a range of green challenges.
CITES warned Africa was suffering a "surge in poaching, in particular of elephants", and called for "even stronger law enforcement and demand-reduction efforts across multiple countries, to reverse the current dangerous trends."
Organised crime syndicates and rebel militia increasingly use poaching to fund insurgencies, reaping the benefits of multi-billion-dollar demand for ivory in China where it is used as decoration and in traditional medicines.
"We are fighting highly organised crime groups that target wildlife for profit. These groups are driven by greed and the scale of their activities can in some places threaten entire ecosystems," said Ben Janse Van Rensburg, head of enforcement for CITES.
