The International Union for Conservation of Nature (IUCN) Red List is a running list of over 134,000 known species, 37,000 of which are classified as either endangered or critically endangered. The IUCN defines endangered species as those ones that are very likely to become extinct in the near...

The International Union for Conservation of Nature (IUCN) Red List is a running list of over 134,000 known species, 37,000 of which are classified as either endangered or critically endangered. The IUCN defines endangered species as those ones that are very likely to become extinct in the near...