Fifth of vertebrates face extinction - study

NAGOYA, Japan (Reuters) - About a fifth of the world's vertebrates are threatened with extinction, a major review has found, highlighting the plight of nature that is the focus of global environment talks underway in Japan.

The study by more than 170 scientists across the globe used data for 25,000 species from the International Union for Conservation of Nature's (IUCN) Red List of threatened species and examined the status of the world's mammals, birds, amphibians, reptiles and fishes.