Threatened species are any species which are vulnerable to extinction in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of critical depensation, a mathematical measure of biomass related to population growth rate. This quantitative metric is one method of evaluating the degree of endangerment.
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 are in use at international, multi-country, national and local levels, as well as for consumer use such as sustainable seafood advisory lists and certification. The two international systems are by the International Union for Conservation of Nature (IUCN) and The Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES).
Gomortega keule is a tree native to Chile. It is the sole species of the genus Gomortega and, according to the APG IV system of 2016, of the monotypic family Gomortegaceae, assigned to the order Laurales in the clade magnoliids.
A conservation-dependent species is a species which has been categorized as "Conservation Dependent" ("LR/cd") by the International Union for Conservation of Nature (IUCN), as dependent on conservation efforts to prevent it from becoming endangered. A species that is reliant on the conservation attempts of humans is considered conservation dependent. Such species must be the focus of a continuing species-specific and/or habitat-specific conservation program, the cessation of which would result in the species qualifying for one of the threatened categories within a period of five years. The determination of status is constantly monitored and can change.
An IUCN Red List Critically Endangered 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.
Notiosorex cockrumi, also called Cockrum's gray shrew or Cockrum's desert shrew, is a tiny species of shrews named in 2003. This red-toothed shrew, which is as light as a penny, is the first new mammal species from Arizona since 1977. Its range extends from Arizona to central Sonora, Mexico.
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.
Juania australis, the Chonta palm, is a species of flowering plant in the family Arecaceae, the only species in the genus Juania. It is a solitary trunked palm tree which is endemic to the Juan Fernández Islands archipelago in the southeast Pacific Ocean west of Chile.
Verschaffeltia splendida is a species of flowering plant in the family Arecaceae. It is the only species in the genus Verschaffeltia.
The southern silvery kingfisher is a species of bird in the family Alcedinidae that is endemic to the Philippines found in Mindanao and Basilan. This species and the northern silvery kingfisher, found in the Visayas, were formerly considered conspecific and called the silvery kingfisher.Its natural habitats are tropical moist lowland forests, streams and rivers.. It is threatened by habitat loss.
Crocidura grandiceps is a species of mammal in the family Soricidae. It is found in Benin, Ivory Coast, Ghana, Guinea, Liberia, Nigeria, and Togo. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss due to agriculture and aquaculture as well as logging and wood harvesting. To increase habitat protection for the C. grandiceps, in-place land/water protection conservation actions are in place. The vernacular name large-headed shrew is sometimes applied to C. grandiceps but has also been used for the entire related genus Paracrocidura. The IUCN List categorizes the C. grandiceps as Near Threatened as of 2008.
The greater long-nosed bat or Mexican long-nosed bat is a species of bat in the family Phyllostomidae. It is found in Mexico and the United States. It chiefly consumes pollen and nectar, particularly from agave plants and cacti. Its habitat includes desert scrub and open woodlands. It is threatened by habitat loss.
Veldkamp's dwarf epauletted fruit bat is a species of bat in the family Pteropodidae. It is the only species within the genus Nanonycteris. It is found in Benin, Cameroon, Central African Republic, Ivory Coast, Ghana, Guinea, Liberia, Nigeria, Sierra Leone, and Togo. Its natural habitats are subtropical or tropical moist, mangrove and montane forests, and savanna.
Koslov's pika or Kozlov's pika is a species of mammal in the family Ochotonidae. It is endemic to China. Its natural habitat is tundra. It is threatened by habitat loss. Kozlov's pika are herbivores, they are known as "ecosystem engineers" as they're known to promote diversity of different plants species. Specifically, this species of Pikas has been enlisted as "endangered" in China. Kozlov Pikas are estimated to be within the Northern edge of the Arkatag Range in China.
Arrojadoa bahiensis is a species of plant in the family Cactaceae. It is endemic to Brazil. Its natural habitat is rocky areas.
Hopea odorata, or ta-khian, is a species of plant in the family Dipterocarpaceae. It is found in Bangladesh, Cambodia, India, Laos, Malaysia, Myanmar, Thailand, and Vietnam. It is a large tree reaching up to 45 m in height with the base of the trunk reaching a diameter of 4.5 m. It grows in forests, preferably near rivers, at altitudes between 0 and 600m. In places such as West Bengal and the Andaman Islands it is often planted as a shade tree. Valued for its wood, it is a threatened species in its natural habitat.
Aleuritopteris albofusca is a species of fern in the family Pteridaceae. It is endemic to China, including Tibet. Its natural habitat is subtropical or tropical dry forests. It is threatened by habitat loss.
Aleuritopteris grevilleoides is a species of fern in the family Pteridaceae. It is endemic to China. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.
A vulnerable species is a species which has been categorized by the International Union for Conservation of Nature as being threatened with extinction unless the circumstances that are threatening its survival and reproduction improve.
