
An endling is the last known individual of a species or subspecies. Once the endling dies, the species becomes extinct. The word was coined in correspondence in the scientific journal Nature. Alternative names put forth for the last individual of its kind include ender and terminarch.

The thylacine is an extinct carnivorous marsupial that was native to the Australian mainland and the islands of Tasmania and New Guinea. It was the largest known carnivorous marsupial in the world prior to its extinction, evolving about 2 million years ago. The last known live animal was captured in 1930 in Tasmania. It is commonly known as the Tasmanian tiger or the Tasmanian wolf. On the Australian mainland, it has been referred as the Nannup tiger. Various Aboriginal Tasmanian names have been recorded, such as coorinna, kanunnah, cab-berr-one-nen-er, loarinna, laoonana, can-nen-ner and lagunta, while kaparunin is used in the constructed language of Palawa kani.

Carpinus putoensis is a species of plant in the family Betulaceae. It is a small tree, up to 15 metres (49 ft) tall.

The Pyrenean ibex, Aragonese and Spanish common name bucardo, Basque common name bukardo, Catalan common name herc and French common name bouquetin, was one of the four subspecies of the Iberian ibex or Iberian wild goat, a species endemic to the Pyrenees. Pyrenean ibex were most common in the Cantabrian Mountains, Southern France, and the northern Pyrenees. This species was common during the Holocene and Upper Pleistocene, during which their morphology, primarily some skulls, of the Pyrenean ibex was found to be larger than other Capra subspecies in southwestern Europe from the same time.
Hyophorbe amaricaulis is a species of palm tree of the order Arecales, family Arecaceae, subfamily Arecoideae, tribe Chamaedoreeae. It is found exclusively on the island of Mauritius, and only a single surviving specimen has been documented in the Curepipe Botanic Gardens in Curepipe. Thus, it is classified as an endling.

Lonesome George was a male Pinta Island tortoise and the last known individual of the species. In his last years, he was known as the rarest creature in the world. George serves as an important symbol for conservation efforts in the Galápagos Islands and throughout the world.

Madhuca diplostemon is a species of flowering plant in the family Sapotaceae, endemic to India. It is a threatened tree species of the Western Ghats whose original specimens were collected in 1835, and it was considered extinct for 184 years until a single living specimen was discovered in a sacred grove in Kollam district, when scientists at the Jawaharlal Nehru Tropical Botanic Garden and Research Institute (JNTBGRI) identified the tree as Madhuca diplostemon rather than the common attilippa.

Martha was the last known living passenger pigeon ; she was named "Martha" in honor of the first First Lady Martha Washington.

Pennantia baylisiana, commonly known as Three Kings Kaikōmako and Kaikōmako Manawa Tāwhi (Māori) is a species of plant in the family Pennantiaceae. It is endemic to the Three Kings Islands, New Zealand, where only one plant is known to exist. It is threatened by habitat loss. Since its discovery in 1945; it has been successfully propagated. The single tree known in the wild grows on a scree slope on the northern face of Great Island in the Three Kings group off Cape Reinga, New Zealand. The species was discovered in 1945 by Professor Geoff Baylis of the University of Otago.

Sudan was a captive northern white rhinoceros that lived at the Dvůr Králové Zoo in the Czech Republic from 1975 to 2009 and the rest of his life at the Ol Pejeta Conservancy in Laikipia, Kenya. At the time of his death, he was one of only three living northern white rhinoceroses in the world, and the last known male of his subspecies. Sudan was euthanised on 19 March 2018, after suffering from "age-related complications".

Toughie was the last known living Rabbs' fringe-limbed treefrog. The species, scientifically known as Ecnomiohyla rabborum, is thought to be extinct, as the last specimen—Toughie—died in captivity on September 26, 2016.