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 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 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.
A least-concern species is a species that has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated as not being a focus of species conservation. They do not qualify as threatened, near threatened, or conservation dependent.
A near-threatened species is a species which has been categorized as "Near Threatened" (NT) by the International Union for Conservation of Nature as that may be endangered in the near future, although it does not currently qualify for the threatened status.
Boeckella bispinosa is a species of calanoid copepod in the family Centropagidae.
Boeckella is a genus of copepods in the family Centropagidae.
Boeckella calcaris is a species of calanoid copepod in the family Centropagidae.
Boeckella geniculata is a species of calanoid copepod in the family Centropagidae.
Boeckella nyoraensis is a species of calanoid copepod in the family Centropagidae.
Calamoecia elongata is a species of calanoid copepod in the family Centropagidae.
Calamoecia zeidleri is a species of calanoid copepod in the family Centropagidae.
Ceylonthelphusa durrelli is a species of decapod in the family Gecarcinucidae. It is native to Central Province, Sri Lanka.
Ceylonthelphusa orthos is a species of decapod in the family Gecarcinucidae.
Ceylonthelphusa venusta is a species of decapod in the family Gecarcinucidae.
Euastacus setosus is a species of southern crawfish in the family Parastacidae.
Hemiboeckella powellensis is a species of copepod endemic to Lake Powell, Western Australia. It is listed as a vulnerable species on the IUCN Red List. It was first described by I. A. E. Bayly in 1979. No females have been found.
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.
Chlorocypha helenae is a species of jewel damselfly in the family Chlorocyphidae.
Chlorocypha neptunus is a species of jewel damselfly in the family Chlorocyphidae.
Chlorocypha rubida is a species of jewel damselfly in the family Chlorocyphidae.
