An endangered species is a population of organisms which is at risk of becoming extinct because it is either few in numbers, or threatened by changing environmental or predation parameters. The International Union for Conservation of Nature (IUCN) has calculated the percentage of endangered species as 40 percent of all organisms based on the sample of species that have been evaluated through 2006.Many nations have laws offering protection to conservation reliant species: for example, forbidding hunting, restricting land development or creating preserves.Examines the premise that at various times in the past, many species have become extinct as a result of natural, rather than human, processes. Debates whether there is justification for society to make extraordinary efforts, especially at a great cost in money and jobs, to save endangered species.It's true that many, perhaps most, species have become extinct as a result of natural process rather than human interference. After all, compared to the existing time of the planet, human history is too short a period. However, this does not follow that it's of no justification for society to try to save endangered species. The contention apparently ignores the fact that there are a delicate ecological balance in the nature, of which human beings is a part and any action of any part of the ecological cycle will have an effect on the nature sooner or later.
Only a few of the many species at risk of extinction actually make it to the lists and obtain legal protection like Pandas. Many more species become extinct, or potentially will become extinct, without gaining public notice.Conservation statusThe conservation status of a species is an indicator of the likelihood of that endangered species not living. Many factors are taken into account when assessing the conservation status of a species; not simply the number remaining, but the overall increase or decrease in the population over time, breeding success rates, known threats, and so on.Internationally, 199 countries have signed an accord agreeing to create Biodiversity Action Plans to protect endangered and other threatened species.
IUCN Red List Endangered species
IUCN Red List refers to a specific category of threatened species, and may include critically endangered species. IUCN Red List of Threatened Species uses the term endangered species as a specific category of imperilment, rather than as a general term. Under the IUCN Categories and Criteria, endangered species is between critically endangered and vulnerable. Also critically endangered species may also be counted as endangered species and fill all the criteria The more general term used by the IUCN for species at risk of extinction is threatened species, which also includes the less-at-risk category of vulnerable species together with endangered and critically endangered. IUCN categories include: Extinct:
Examples: Javan Tiger, Thylacine, Dodo, Passenger Pigeon, Caribbean Monk Seal, Steller's Sea Cow, Aurochs, Elephant Bird, Woolly Mammoth, Dusky Seaside Sparrow Extinct in the wild:
Captive individuals survive, but there is no free-living, natural population. Examples: Hawaiian Crow, Wyoming Toad, Socorro Dove, Red-tailed Black Shark, Scimitar Oryx, Catarina Pupfish
Faces an extremely high risk of extinction in the immediate future. Examples: Mountain Gorilla, Bactrian Camel, Ethiopian Wolf, Saiga, Kakapo, Arakan Forest Turtle, Sumatran Rhinoceros, Javan Rhino, Brazilian Merganser, Axolotl, Leatherback Sea Turtle, Northern White Rhinoceros, Gharial, Vaquita, Philippine Eagle, Brown Spider Monkey, California Condor, Island Fox, Black Rhinoceros, Chinese Alligator Endangered:
Faces a very high risk of extinction in the near future. Examples: Dhole, Blue Whale, Asian Elephant, Giant Panda, Snow Leopard,...