Extinct Species
Longnose Harlequin Frog
Chiriqui Harlequin Frog
Ainsworth’s Salamander
Mount Glorious Torrent Frog
Eungella Gastric-brooding Frog
Southern Platypus Frog
Las Vegas Leopard Frog
Spiny-knee Leaf Frog
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