More than a third of species assessed in a major international biodiversity study are threatened with extinction, scientists have warned.
These included 21% of all known mammals, 30% of amphibians, 70% of plants and 35% of invertebrates.
Conservationists warned that not enough was being done to tackle the main threats, such as habitat loss.
"The scientific evidence of a serious extinction crisis is mounting," warned Jane Smart, director of the International Union for the Conservation of Nature's (IUCN) Biodiversity Conservation Group.
"It's time for governments to start getting serious about saving species and make sure it's high on their agendas for next year, as we are rapidly running out of time."
The Red List, regarded as the most authoritative assessment of the state of the planet's species, draws on the work of thousands of scientists around the globe.
Of these, it lists 39 species as either "extinct" or
"extinct in the wild". A further 484 are deemed "critically endangered", 754 "endangered" and 657 "vulnerable".