The IUCN Red List is a comprehensive information source on the status of wild species and their links to livelihoods. The overall aim of the Red List is to convey the urgency and scale of conservation problems to the public and policy makers, and to motivate the global community to work together to reduce species extinctions.
The IUCN Red List assesses the extinction risk of species. Assessments of all mammals, birds, amphibians, sharks, reef-building corals, cycads and conifers have been completed. Efforts are underway to assess all reptiles, fishes and selected groups of plants and invertebrates. This sample indicates how life on Earth is faring, how little is known, and how urgent the need is to assess more species.
— IUCN (@IUCN) November 21, 2017