The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, founded in 1964, is the world's most comprehensive inventory of the global conservation status of biological species. It uses a set of precise criteria to evaluate the extinction risk of thousands of species and subspecies. These criteria are relevant to all species and all regions of the world. With its strong scientific base, the IUCN Red List is recognized as the most authoritative guide to the status of biological diversity. A series of Regional Red Lists are produced by countries or organizations, which assess the risk of extinction to species within a political management unit.
The least gerbil is distributed mainly in South Sudan, southwestern Ethiopia, Kenya, and Tanzania.
A species that is extinct in the wild (EW) is one that has been categorized by the International Union for Conservation of Nature as known only by living members kept in captivity or as a naturalized population outside its historic range due to massive habitat loss.
This article is a list of biological species, subspecies, and evolutionary significant units that are known to have become extinct during the Holocene, the current geologic epoch, ordered by their known or approximate date of disappearance from oldest to most recent.
Kemp's gerbil is a species of rodent. Mammal Species of the World considers G. kempi and G. gambianus to be synonyms, however the IUCN has assessed each taxon as were they different species.
Adenomera andreae is a species of frogs in the family Leptodactylidae.
Adenomera araucaria is a species of frog in the family Leptodactylidae. It is endemic to southern Brazil, where it occurs in the southern part of the Serra Geral in the states of Santa Catarina and Rio Grande do Sul.
Adenomera bokermanni is a species of frog in the family Leptodactylidae, the southern frogs. It is endemic to Brazil, where it is a very common frog. It is thought to be a species complex made up of several species grouped under one scientific name.
Adenomera heyeri is a species of frogs in the family Leptodactylidae, the southern frogs. It is native to South America, where it occurs French Guiana, Suriname, and northern Brazil. It probably also occurs in Guyana. This species was described to science in 2006.
Adenomera lutzi is a species of frog in the family Leptodactylidae. It is endemic to Guyana. First described from the upper Potaro River based on specimens collected before 1905, it is now known from a number of sites around the Pakaraima Mountains in west-central Guyana. The specific name lutzi honors Adolfo Lutz, a Brazilian medical entomologist and parasitologist and a pioneer of herpetology. Common names Lutz's tropical bullfrog and Lutz's thin-toed frog have been coined for the species.
Leptodactylus marmoratus, commonly known as the marbled tropical bullfrog, is a common species of frog in the family Leptodactylidae. It is commonly found under and on the surface of dead leaf litter and dead branches.
Adenomera martinezi is a species of frog in the family Leptodactylidae. It is endemic to Brazil and only known from its type locality, Cachimbo in southwestern Pará. Prior to its redelimitation by Carvalho and Giaretta in 2013, it was believed to be more widespread. The widespread taxon is now recognized as a distinct species, Adenomera saci.
Niceforonia columbiana is a species of frog in the family Craugastoridae, sometimes known as the Colombian Andes frog. It is endemic to Colombia. It is only known from the holotype, which is now lost. The type locality, "Monte Redondo, Buenavista" on the Cordillera Oriental, is in either Cundinamarca or Meta Department, and is considered questionable by some. It might be a synonym of Leptodactylus hylaedactylus.
The World's 25 Most Endangered Primates is a list of highly endangered primate species selected and published by the International Union for Conservation of Nature (IUCN) Species Survival Commission (SSC) Primate Specialist Group (PSG), the International Primatological Society (IPS), Global Wildlife Conservation (GWC), and Bristol Zoological Society (BZS). The IUCN/SSC PSG worked with Conservation International (CI) to start the list in 2000, but in 2002, during the 19th Congress of the International Primatological Society, primatologists reviewed and debated the list, resulting in the 2002–2004 revision and the endorsement of the IPS. The publication was a joint project between the three conservation organizations until the 2012–2014 list when BZS was added as a publisher. The 2018–2020 list was the first time Conservation International was not among the publishers, replaced instead by GWC. The list has been revised every two years following the biannual Congress of the IPS. Starting with the 2004–2006 report, the title changed to "Primates in Peril: The World's 25 Most Endangered Primates". That same year, the list began to provide information about each species, including their conservation status and the threats they face in the wild. The species text is written in collaboration with experts from the field, with 60 people contributing to the 2006–2008 report and 85 people contributing to the 2008–2010 report. The 2004–2006 and 2006–2008 reports were published in the IUCN/SSC PSG journal Primate Conservation,, since then they have been published as independent publications.
Adenomera saci is a species of frog in the family Leptodactylidae. It is endemic to central-western and northern Brazil. Prior to its description by Carvalho and Giaretta in 2013, it was confused with Adenomera martinezi. The specific name saci is Portuguese word for a kind of whistling imp in Brazilian (Tupi) folklore, in allusion to the whistling call of this frog.
