The last naturally born Pyrenean ibex, a 13-year-old female that scientists named Celia, was found mortally wounded in northern Spain on January 6, 2000, trapped beneath a fallen tree. Before Celia died, though, scientists were able to collect skin cells from her ear and preserve them in liquid nitrogen

Only one living quagga was ever photographed. There are five photos in existence of the mare who lived in the London Zoo.

The po’ouli was a small, stocky bird. It had brown tinted feathers above, and was gray-white hued below.In the Hawaiian language, ‘po’ouli’ translates to ‘black head’ or ‘black face’. This gives the bird its alternate name, the black-faced honeycreeper.

The Falkland Islands wolf, or warrah, may have been the world’s loneliest land mammal. It was marooned for thousands of years on the wind-swept Falkland Islands with only seabirds, penguins and seals for company. They lived on both the east and west sides of the islands. They inhabit rocky mountainous terrain or boggy plains and beaches. They were reportedly seen swimming while foraging along the beaches.

Schomburgk’s deer had a dark brown pelt. They had lighter underparts. The underside of the tail was generally white. Schomburgk’s deer was described from a pair of antlers by Edward Blyth in 1863. It takes its name from the former Bangkok British consul (1857-1864), Sir Robert H. Schomburgk.

The rarest of the black rhino subspecies, the Western Black Rhino was officially declared extinct in 2011. Hunted to extinction for their horns, these two-horned Rhinos had very poor eyesight and have been known to use birds (oxpeckers) as an early warning system of approaching threats!

The males of the golden toads were bright orange in color and slightly mottled on the belly. The females had a different variation of colors, like black, yellow, red, and green but were mostly black and chocolate color with scarlet spots and yellow edges. The bright colors in the males were to attract the females.

On June 24th, 2012, Lonesome George — the sole remaining Pinta Island tortoise and Galapagos conservation icon

This bird numbered an estimated 4 million in the 19th century; the last known bird — a captive pigeon named Martha — died on September 1,1914.

Tasmanian Tiger looked like a dog with some tiger stripes but was neither a dog nor a tiger. The last known Tasmanian tiger died on September 7, 1936, and since 1996 the date has been known as National Threatened Species Day in Australia.