Talk of a mass extinction as a report claims a dramatic drop in the world's wildlife populations.

FOX's Simon Owen reports from London:

From salamanders in the United States, to elephants in Tanzania, researchers here in London saying the world's wildlife populations have more than halved since 1970:

(Sohl) "This report gives us a very serious wake-up call."

Heather Sohl, with the World Wildlife Fund, saying that if current trends continue:

(Sohl) "We could be seeing the first mass extinction since the dinosaurs 65 million years ago."

The researchers blaming human activity, not least our growing numbers. The report saying deforestation, over-consumption and pollution all have an impact, along with climate change.

In London, Simon Owen, FOX News.

Follow Simon Owen on Twitter: @BigSo
Follow Heather Sohl on Twitter: @heathersohl