Extinct Species
Lesser Bilby
Toolache Wallaby
Lesser Stick-nest Rat
Eastern Hare Wallaby
Central Hare Wallaby
Candango Mouse
Puerto Rican Hutia
Montane Hutia
Steller’s Sea Cow
Blue Antelope
Imposter Hutia
Insular Cave Rat
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Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species.
The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species’ potential range may be very large, determining this moment is difficult, and is usually done retrospectively.
More than 99% of all species that ever lived on Earth, amounting to over five billion species, are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryote globally, and possibly many times more if microorganisms, like bacteria, are included. Notable extinct animal species include non-avian dinosaurs, saber-toothed cats, dodos, mammoths, ground sloths, thylacines, trilobites and golden toads.
Source: Wikipedia.org