Extinction is when a species is completely gone from everywhere on Earth. Extirpation is when a species is completely gone from one area, but still exists in other parts of the world.
Extirpation is just another word for extinction that has occurred to one specific geographical area. However, while the species may be extinct in one place it is still existing elsewhere. This could also be considered to be the beginning or first start to extinction.
Beavers and sea cows are examples of extirpation.
By the original law of nations, war and extirpation were the punishment of injury.
Extinction refers to complete eradication of a species such as the Warrah or Dinosaurs (things that no longer exist), whereas an endangered species is merely under threat of eventual extinction, but is not there yet, like a panda or a California Condor.
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Mass extinction is when many animals go extinct within a short period of time caused by the same variables/factors leading to the mass extinction.
Current population estimates range between 2,500-3,000 pairs. it is under threat of extinction - endangered.
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the answer to the question is extinction
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They are the end-Ordovician extinction, end-Devonian extinction, end-Permian extinction, the Triassic extinction, end-Cretaceous extinction.