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More than 99 percent of all species, amounting to over five billion species, [7] that ever lived on Earth are estimated to be extinct. [8] [9] Estimates on the number of Earth's current species range from 10 million to 14 million, [10] of which about 1.2 million have been documented and over 86 percent have not yet been described. [11]
Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million in total. Animals range in size from 8.5 millionths of a metre to 33.6 metres (110 ft) long and have complex interactions with each other and their environments, forming intricate food webs .
List of bats by population – Chiropterans. List of elephant species by population – Elephants. List of marsupials by population – Wombats, koalas and kangaroos. List of lagomorphs by population – rabbits, hares, and pikas. List of other Afrotheres by population – seacows, sengis, golden moles, otter shrews, tenrecs, hyraxes and the ...
Most species do not have population estimates, though the roe deer has a population size of approximately 15 million, while several are considered endangered or critically endangered with populations as low as 200.
Common name Binomial name Population Status Trend Notes Image Hainan black crested gibbon: Nomascus hainanus: 20–50 [1]: CR [1] [1]Population was estimated at over 2,000 in the late 1950s.
Population sizes range from the Falkland Islands wolf, extinct since 1876, to the domestic dog, which has a worldwide population of over 1 billion. [1] The body forms of canids are similar, typically having long muzzles, upright ears, teeth adapted for cracking bones and slicing flesh, long legs, and bushy tails. [2]
This page gives a list of domesticated animals, [1] ... Small captive population, but nearly extinct in the wild 1b Bovidae: Caracal (Caracal caracal) [62]
Ranges are based on the IUCN Red List for that species unless otherwise noted. All extinct species or subspecies listed alongside extant species went extinct after 1500 CE, and are indicated by a dagger symbol "†". Population figures are rounded to the nearest hundred.