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.
A booby is a seabird in the genus Sula, part of the family Sulidae. Boobies are closely related to the gannets (Morus), which were formerly included in Sula.
The conservation status of a group of organisms indicates whether the group still exists and how likely the group is to become extinct in the near future. Many factors are taken into account when assessing conservation status: not simply the number of individuals remaining, but the overall increase or decrease in the population over time, breeding success rates, and known threats. Various systems of conservation status exist and are in use at international, multi-country, national and local levels as well as for consumer use.
The piebald shrew is a shrew found in the Turan Lowland east of the Caspian Sea in Iran, Turkmenistan and Uzbekistan. It grows to 2–23⁄4 inches in length, and usually hunts for insects and lizards at night. It is the only extant member of the genus Diplomesodon. In 2011, A. Cheke described a new and possibly extinct species based on a 19th-century manuscript: Diplomesodon sonnerati. It was described again in 2018 to meet certain validity requirements of the ICZN code.
An IUCN Red List Critically Endangered (CR) species is one that has been categorized by the International Union for Conservation of Nature as facing an extremely high risk of extinction in the wild. As of 2021, of the 120,372 species currently tracked by the IUCN, there are 8,404 species that are considered to be Critically Endangered.
The blue-backed parrot, also known as Müller's parrot is a large bird endemic to the Philippines. It was previously conspecific with the azure-rumped parrot which is differentiated by its yellow eyeris and plain green back versus the blue-backed parrots blue back and red iris. It is found in tropical moist lowland forests. Flocks are small and often active at night. IUCN now lists this as endangered with population being estimated as 250 to 999 mature individuals. Its main threats are habitat loss and trapping for the pet trade.
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.
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.
Didelotia idae is a species of plant in the family Fabaceae. It is found in Ivory Coast, Ghana, Liberia and Sierra Leone. It is threatened by habitat loss.
Didelotia is a genus of flowering plants in the family Fabaceae.
The Oʻahu ʻalauahio, also known as the Oʻahu creeper, is a small finch-like Hawaiian honeycreeper that is endemic to the Hawaiian island of Oahu. It is probably extinct.
Cariniana legalis is a species of woody plant in the family Lecythidaceae. It is found in south-eastern Brazil, where is known as jequitibá-branco or jequitibá-rosa, possibly Colombia, and possibly Venezuela.
The Siberian shrew is a species of mammal in the family Soricidae. It is found in Russia, possibly China, and possibly Mongolia.
The Honduran small-eared shrew is a species of mammal in the family Soricidae. It is found in Honduras and possibly in El Salvador, Guatemala, and Nicaragua.
The thin mouse shrew is a species of mammal in the family Soricidae found in South Africa and possibly Mozambique.
The Caucasian pygmy shrew or Ukrainian shrew is a species of mammal in the family Soricidae. It is found in Armenia, Azerbaijan, Georgia (country), Russia, Ukraine, possibly Iran, and possibly Turkey.
Anderson's shrew is a medium-sized species of shrew. It is light gray in color with yellow fur around the throat and pectoral region, comparatively large ears and a tail that measures about 50 – 70% of body length. This shrew species is widespread, found in India, Nepal, Pakistan and possibly Bangladesh, in gardens and grassy embankments near watercourses, under piles of brushwood in forest plantations (Punjab) as well as the bases of stone walls in Kathiawar, and also in desert and arid country. As far as is known, the habits of the Anderson's shrew are largely nocturnal and solitary. Breeding may extend throughout the year.
The Sierra Leone free-tailed bat is a species of bat in the family Molossidae. It is found in Cameroon, Ivory Coast, Equatorial Guinea, Gabon, Ghana, Guinea, Kenya, Liberia, Mozambique, Nigeria, Sierra Leone, Tanzania, Togo, possibly Central African Republic, possibly Republic of the Congo, and possibly Democratic Republic of the Congo. Its natural habitats are subtropical or tropical dry forests and subtropical or tropical moist lowland forests. It is threatened by habitat loss.
Helicia albiflora is a species of plant in the family Proteaceae. It is endemic to Papua New Guinea. It is threatened by habitat loss.
