The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, 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.
Primula is a genus of herbaceous flowering plants in the family Primulaceae. They include the primrose, a familiar wildflower of banks and verges. Other common species are P. auricula (auricula), P. veris (cowslip), and P. elatior (oxlip). These species and many others are valued for their ornamental flowers. They have been extensively cultivated and hybridised. Primula are native to the temperate Northern Hemisphere, south into tropical mountains in Ethiopia, Indonesia, and New Guinea, and in temperate southern South America. Almost half of the known species are from the Himalayas.
Callitris columellaris is a species of coniferous tree in the family Cupressaceae, native to most of Australia. Common names include white cypress, white cypress-pine, Murray River cypress-pine, and northern cypress-pine. Callitris columellaris has become naturalised in Hawaii and in southern Florida.
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.
Pterocarpus santalinus, with the common names red sanders, red saunders, Yerra Chandanam, Chenchandanam, red sandalwood, Rakta Chandana, and saunderswood, is a species of Pterocarpus endemic to the southern Eastern Ghats mountain range of South India. This tree is valued for the rich red colour of its wood. The wood is traditionally considered not aromatic. However, in recent years there has been a marked uptick in the use of red sandalwood as a component of incense, especially in the west. The tree is not to be confused with the aromatic Santalum sandalwood trees that grow natively in Southern India.
The Sunda scops owl is a small brown owl native to the Sunda Islands.
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.
Normanbya is a monotypic genus of palms containing the single species Normanbya normanbyi, which is known by the common name black palm It is endemic to Queensland, Australia and is threatened by habitat destruction.
Tectiphiala ferox, or palmiste bouglé, is a species of flowering plant in the family Arecaceae. It is endemic to Mauritius.
The bridled white-eye was a species of bird in the family Zosteropidae. It was endemic to the island of Guam in the Mariana Islands. The species' natural habitat was subtropical or tropical moist lowland forests. One traditionally recognized subspecies is endemic to the Northern Mariana Islands, on the islands of Tinian, Saipan and Aguijan.
Oxanthera brevipes is a species of plant in the family Rutaceae. It is endemic to New Caledonia. It was proposed as a novel species by Benjamin C. Stone based on two specimens, distinguished from other false oranges by a non-articulated petiole. The genus Oxanthera has been synonymized with Citrus, but a name in Citrus does not appear to have been published, and Plants of the World Online regards "Oxanthera brevipes" as an unplaced name.
Rosselia is a genus of plants in the family Burseraceae. The sole species is Rosselia bracteata, endemic to Papua New Guinea. It is a tree and grows primarly in the wet tropical biome(s).
Turbinicarpus saueri is a species of plant in the family Cactaceae.
Vitex parviflora is a species of plant in the family Verbenaceae, also known as smallflower chastetree or the molave tree. The name "molave" is from Spanish, derived from mulawin, the Tagalog word for the tree. It is also known as tugas in Visayan languages. It yields one of two woods from the same genus called molave wood, the other being Vitex cofassus.
The Kauaʻi nukupuʻu was a species of nukupuʻu once found throughout parts of the Hawaiian island of Kauaʻi. It was an insect eater that picked out its tiny prey from tree bark. The males were yellowish with brown wings, while the females were grayish brown with a yellow throat streak.
The serows are four species of medium-sized goat-like or antelope-like mammals of the genus Capricornis. All four species of serow were until recently also classified under Naemorhedus, which now only contains the gorals.
An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and invasive species. The International Union for Conservation of Nature (IUCN) Red List lists the global conservation status of many species, and various other agencies assess the status of species within particular areas. Many nations have laws that protect conservation-reliant species which, for example, forbid hunting, restrict land development, or create protected areas. Some endangered species are the target of extensive conservation efforts such as captive breeding and habitat restoration.
The Togian babirusa, also known as the Malenge babirusa, is the largest species of babirusa. It is endemic to the Togian Islands of Indonesia, but was considered a subspecies of Babyrousa babyrussa until 2002. Compared to the better-known north Sulawesi babirusa, the Togian babirusa is larger, has a well-developed tail-tuft, and the upper canines of the male are relatively "short, slender, rotated forwards, and always converge". The Togian babirusa is omnivorous, feeding mainly on roots and fallen fruit but also worms and invertebrates. Unlike other pig species, the Togian babirusa does not root at the ground with its snout when foraging, but instead can be seen pawing at the ground to uproot plants.
Cleistanthus hylandii is a plant in the family Phyllanthaceae which is endemic to north east Queensland, Australia. It was first described by Airy Shaw in the Kew Bulletin in 1976.
