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Near-threatened
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 vulnerable to endangerment in the near future, but it does not currently qualify for the threatened status. The IUCN notes the importance of re-evaluating near-threatened taxon at appropriate intervals. The rationale used for near-threatened taxa usually includes the criteria of vulnerable which are plausible or nearly met, such as reduction in numbers or range. Near-threatened species evaluated from 2001 onwards may also be ones which are dependent on conservation efforts to prevent their becoming threatened, whereas before this conservation-dependent species were given a separate category ("Conservation Dependent"). Additionally, the 402 conservation-dependent taxa may also be considered near-threatened. IUCN Categories and Criteria version 2.3 Before 2001, the IUCN used the version 2.3 Categories and Criteri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endangered Species
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. Human activity is a significant cause in causing some species to become endangered. Conservation status The conservation status of a species indicates the likelihood that it will become extinct. Multiple factors are considered when assess ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Near Threatened Species
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 vulnerable to endangerment in the near future, but it does not currently qualify for the threatened status. The IUCN notes the importance of re-evaluating near-threatened taxon at appropriate intervals. The rationale used for near-threatened taxa usually includes the criteria of vulnerable which are plausible or nearly met, such as reduction in numbers or range. Near-threatened species evaluated from 2001 onwards may also be ones which are dependent on conservation efforts to prevent their becoming threatened, whereas before this conservation-dependent species were given a separate category ("Conservation Dependent"). Additionally, the 402 conservation-dependent taxa may also be considered near-threatened. IUCN Categories and Criteria version 2.3 Before 2001, the IUCN used the version 2.3 Categories and Criteria ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Near Threatened Reptiles
As of September 2016, the International Union for Conservation of Nature (IUCN) lists 329 near threatened reptile species. 6.4% of all evaluated reptile species are listed as near threatened. The IUCN also lists two reptile subspecies as near threatened. Of the subpopulations of reptiles evaluated by the IUCN, two species subpopulations have been assessed as near threatened. This is a complete list of near threatened reptile species and subspecies evaluated by the IUCN. Species and subspecies which have near threatened subpopulations (or stocks) are indicated. Turtles and tortoises Species Subspecies * Siebenrock's snake-necked turtle (''Chelodina rugosa siebenrocki'') Subpopulations *Loggerhead sea turtle (''Caretta caretta'') (2 subpopulations) Crocodilia species *Black caiman (''Melanosuchus niger'') Lizards There are 213 lizard species assessed as near threatened. Diplodactylids Chameleons Anoles Gekkonids Wall lizards Skinks Sphaerodactylids ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Near Threatened Molluscs
As of September 2016, the International Union for Conservation of Nature (IUCN) lists 535 near threatened mollusc species. 7.4% of all evaluated mollusc species are listed as near threatened. The IUCN also lists nine mollusc subspecies as near threatened. No subpopulations of molluscs have been evaluated by the IUCN. This is a complete list of near threatened mollusc species and subspecies evaluated by the IUCN. Gastropods There are 477 species and four subspecies of gastropod assessed as near threatened. Stylommatophora Stylommatophora includes the majority of land snails and slugs. There are 250 species and four subspecies in the order Stylommatophora assessed as near threatened. Zonitids Clausiliids Species Subspecies *'' Alopia bielzii clathrata'' *''Macrogastra lineolata euzieriana'' Helminthoglyptids Camaenids Species Subspecies *'' Glyptorhagada wilkawillina umbilicata'' Vertiginids Cochlicellids Trissexodontids Helicids Hygromiids Species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Near Threatened Mammals
As of September 2016, the International Union for Conservation of Nature (IUCN) lists 343 near threatened mammalian species. 6.2% of all evaluated mammalian species are listed as near threatened. The IUCN also lists 31 mammalian subspecies as near threatened. Of the subpopulations of mammals evaluated by the IUCN, one species subpopulation and one subspecies subpopulation have been assessed as near threatened. This is a complete list of near threatened mammalian species and subspecies evaluated by the IUCN. Species and subspecies which have near threatened subpopulations (or stocks) are indicated. Where possible common names for taxa are given while links point to the scientific name used by the IUCN. Odd-toed ungulates Species Subspecies Primates Species * Campbell's mona monkey * Mona monkey Subspecies Cetartiodactyls Cetartiodactyla includes dolphins, whales and even-toed ungulates. There are 31 species, eight subspecies, one subpopulations of species, and one ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Near Threatened Invertebrates
As of July 2016, the International Union for Conservation of Nature (IUCN) lists 1105 near threatened invertebrate species. 6.1% of all evaluated invertebrate species are listed as near threatened. The IUCN also lists 15 invertebrate subspecies as near threatened. No subpopulations of invertebrates have been evaluated by the IUCN. This is a complete list of near threatened invertebrate species and subspecies as evaluated by the IUCN. Molluscs There are 535 mollusc species and nine mollusc subspecies assessed as near threatened. Gastropods There are 477 gastropod species and four gastropod subspecies assessed as near threatened. Stylommatophora Stylommatophora includes the majority of land snails and slugs. There are 250 species and four subspecies in the order Stylommatophora assessed as near threatened. = Zonitids= = Clausiliids= Species Subspecies *'' Alopia bielzii clathrata'' *''Macrogastra lineolata euzieriana'' = Helminthoglyptids= = Camaenids= Species Subspec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Near Threatened Insects
As of July 2016, the International Union for Conservation of Nature (IUCN) lists 301 near threatened insect species. 5.0% of all evaluated insect species are listed as near threatened. No subpopulations of insects have been evaluated by the IUCN. This is a complete list of near threatened insect species and subspecies as evaluated by the IUCN. Hemiptera Orthoptera Hymenoptera Lepidoptera Lepidoptera comprises moths and butterflies. There are 62 species in the order Lepidoptera assessed as near threatened. Swallowtail butterflies Lycaenids Nymphalids Other Lepidoptera species Beetles There are 56 beetle species assessed as near threatened. Geotrupids Click beetles Scarabaeids Other beetle species Odonata Odonata includes dragonflies and damselflies. There are 119 species in the order Odonata assessed as near threatened. Chlorocyphids Platycnemidids Gomphids Cordulegastrids Corduliids Calopterygids Coenagrionids Aeshnids Li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Near Threatened Fishes
As of September 2016, the International Union for Conservation of Nature (IUCN) lists 548 near threatened fish species. 3.6% of all evaluated fish species are listed as near threatened. The IUCN also lists seven fish subspecies as near threatened. Of the subpopulations of fish evaluated by the IUCN, ten species subpopulations have been assessed as near threatened. This is a complete list of near threatened fish species and subspecies evaluated by the IUCN. Species and subspecies which have near threatened subpopulations (or stocks) are indicated. Cartilaginous fish Chondrichthyes includes sharks, rays, skates, and sawfish. There are 118 species and eight subpopulations of cartilaginous fish assessed as near threatened. Rays and skates Ground sharks There are 35 species and one subpopulation of ground shark assessed as near threatened. Requiem sharks Species Subpopulations *Pigeye shark ''(Carcharhinus amboinensis)'' (1 subpopulation) Houndsharks Catsharks Othe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Near Threatened Birds
As of December 2020, the International Union for Conservation of Nature (IUCN) lists 1001 near threatened avian species. 9.1% of all evaluated avian species are listed as near threatened. No subpopulations of birds have been evaluated by the IUCN. This is a complete list of near threatened avian species evaluated by the IUCN. Where possible common names for taxa are given while links point to the scientific name used by the IUCN. Penguins Procellariiformes Gruiformes There are 18 species in the order Gruiformes assessed as near threatened. Trumpeters * Grey-winged trumpeter * Pale-winged trumpeter Rallids Bustards Parrots There are 61 parrot species assessed as near threatened. Cockatoos * Tanimbar corella Psittacids Suliformes Pigeons and doves Phoenicopteriformes Pelecaniformes Galliformes There are 43 species in the order Galliformes assessed as near threatened. Cracids Phasianids New World quails Struthioniformes Bucerotifor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Near Threatened Arthropods
As of July 2016, the International Union for Conservation of Nature (IUCN) lists 390 near threatened arthropod species. 4.1% of all evaluated arthropod species are listed as near threatened. The IUCN also lists six arthropod subspecies as near threatened. No subpopulations of arthropods have been evaluated by the IUCN. This is a complete list of near threatened arthropod species and subspecies as evaluated by the IUCN. Arachnids Branchiopoda * Mono Lake brine shrimp ''(Artemia monica)'' * California linderiella ''(Linderiella occidentalis)'' Entognatha *'' Blasconura batai'' *'' Lepidonella lecongkieti'' Maxillopoda Malacostracans Decapods There are 71 decapod species and six decapod subspecies assessed as near threatened. Parastacids Gecarcinucids Atyids Species Subspecies Cambarids Potamids Other decapod species Insects There are 301 insect species assessed as near threatened. Hemiptera Orthoptera Hymenoptera Lepidoptera Lepidoptera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Near Threatened Amphibians
As of September 2016, the International Union for Conservation of Nature (IUCN) lists 402 near threatened amphibian species. 6.2% of all evaluated amphibian species are listed as near threatened. No subpopulations of amphibians have been evaluated by the IUCN. This is a complete list of near threatened amphibian species evaluated by the IUCN. Salamanders There are 62 salamander species assessed as near threatened. Lungless salamanders Salamandrids Other salamander species Frogs There are 340 frog species assessed as near threatened. Robber frogs Shrub frogs True toads Fleshbelly frogs Glass frogs Litter frogs Screeching frogs Hemiphractids Cycloramphids Poison dart frogs Mantellids Fork-tongued frogs Narrow-mouthed frogs True frogs Puddle frogs Hylids African reed frogs Pyxicephalids Other frog species See also * Lists of IUCN Red List near threatened species * List of least concern amphibians * List of vulnerab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can reproduction, produce Fertility, fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
