Looting Planet Earth: "'The best guess of biologists is that species are disappearing between 100 and 1000 times as fast as they were before Homo sapiens arrived. But our impact is different from the mass extinctions of the past. They wiped out whole groups of animals, notably the dinosaurs, whereas humans are picking off individual species. In the past, biodiversity recovered as species spread into new ecological niches, but humans are wiping out niches as well as organisms. Wildlife will have a tough time regenerating.

"'The winners after the mass extinction that finished off the dinosaurs are about to become the losers. One in four mammal species and one in eight bird species face a high risk of extinction in the near future: the population of each species is expected to fall by at least a fifth in the next 10 years. Almost all are endangered by human activity"

Looting Planet Earth: "'The best guess of biologists is that species are disappearing between 100 and 1000 times as fast as they were before Homo sapiens arrived. But our impact is different from the mass extinctions of the past. They wiped out whole groups of animals, notably the dinosaurs, whereas humans are picking off individual species. In the past, biodiversity recovered as species spread into new ecological niches, but humans are wiping out niches as well as organisms. Wildlife will have a tough time regenerating.

"'The winners after the mass extinction that finished off the dinosaurs are about to become the losers. One in four mammal species and one in eight bird species face a high risk of extinction in the near future: the population of each species is expected to fall by at least a fifth in the next 10 years. Almost all are endangered by human activity"