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Number of mammals in the world
Here is the number of mammals on Earth :
Humans are without surprise the big mammal with the largest population.
The mice are far ahead of us with a 20 times greater presence on the globe. They have a sexual maturity at 8 weeks, a gestation time of 20 days. A mouse can give birth to 80 babies in its life.
The rabbits are also well positioned, with sexual maturity at 7 months and a gestation period of one month. A rabbit may have 48 kids during its life in the wild, and 144 if domesticated.
The rats are “only” a little less than ten billion. A female rat can give birth to 155 babies during its lifetime, which is much more than the mouse. Rats are found mostly in grasslands, contrary to what we might think. In town their population is quickly decimated in case of flood but their reproduction rate makes that they soon fill the gap.
Hamster is much more present than rats and mice, with up to 216 babies during the life of a female. Their pregnancy can reach up to 13 tiny hamster. That is why their population is colossal. They eat mostly seeds, but can also devour vegetables, fruits, stems, leaves, roots, insects, small vertebrates, frogs. Their food reserves can reach up to 200 lbs in some burrows. Sometimes they can devour each other to eliminate the weak ones.
There is a total of 396 billion of mammals on the planet.
| Number of mammals in the world | ||||
|---|---|---|---|---|
| Animal | Type | Population | Year | Source |
| Mice | Mammal | 1,7 x 10^11 | 2017 | W3Ask |
| Wild rabbits | Mammal | 1,4 x 10^11 | 2017 | W3Ask |
| Hamsters | Mammal | 52,500,000,000 | 2017 | W3Ask |
| Brown rats | Mammal | 9,780,511,000 | 2008 | The Sun |
| Humans | Mammal | 7,523,470,000 | 2017 | Worldometers |
| Squirrels | Mammal | 5,897,500,000 | 2017 | W3Ask |
| Hares | Mammal | 2,880,000,000 | 2017 | W3Ask |
| Black rats | Mammal | 1,015,670,000 | 2014 | Newsweek |
| Domestic sheeps | Mammal | 1,100,000,000 | 2017 | World Atlas |
| Cows | Mammal | 998,300,000 | 2017 | Beef2live |
| Domestic goats | Mammal | 860,000,000 | 2017 | World Atlas |
| Domestic pigs | Mammal | 784,830,000 | 2016 | Statista |
| Domestic rabbits | Mammal | 769,050,000 | 2014 | Jetpunk Data World |
| Domestic cats | Mammal | 625,000,000 | 2017 | World Atlas |
| Domestic dogs | Mammal | 425,000,000 | 2017 | World Atlas |
| Wild boars | Mammal | 350,000,000 | 2017 | W3Ask |
| Hedgehogs | Mammal | 219,000,000 | 2017 | W3Ask |
| Stray dogs | Mammal | 200,000,000 | 2011 | WHO |
| Water buffaloes | Mammal | 172,000,000 | 2011 | MJAS |
| Guinea pigs | Mammal | 105,000,000 | 2017 | W3Ask |
| Feral cats | Mammal | 100,000,000 | 2013 | Ecology Global Network |
| Lab animals | Mammal | 100,000,000 | 2017 | W3Ask |
| Weasels | Mammal | 80,000,000 | 2017 | W3Ask |
| Porcupines | Mammal | 62,790,000 | 2017 | W3Ask |
| Horses | Mammal | 58,000,000 | 2011 | FAOSTAT |
| Deers | Mammal | 46,710,000 | 2000 | IUCN |
| Donkey | Mammal | 40,000,000 | 2011 | FAOSTAT |
| Marmots | Mammal | 30,000,000 | 2017 | W3Ask |
| Seals | Mammal | 26,139,000 | 2008 | IUCN |
| Dromedaries | Mammal | 14,560,000 | 2005 | ICAR |
| Camels | Mammal | 14,000,000 | 2010 | Randome House Digital |
| Duikers | Mammal | 13,234,000 | 2008 | IUCN |
| Ferrets | Mammal | 12,500,000 | 2017 | W3Ask |
| Beavers | Mammal | 12,000,000 | 1988 | Nowak, Ronald M |
| Mules | Mammal | 10,000,000 | 2011 | FAOSTAT |
| Elks | Mammal | 10,030,000 | 2009 | Gohunt |
| Coypus | Mammal | 10,000,000 | 2017 | W3Ask |
| Chinchillas | Mammal | 7,000,000 | 2017 | W3Ask |
| Kangaroos | Mammal | 5,304,040 | 2008 | IUCN |
| Capybaras | Mammal | 5,024,000 | 2017 | W3Ask |
| Armadillos | Mammal | 3,500,000 | 2017 | W3Ask |
| Caribous | Mammal | 2,890,410 | 2016 | IUCN |
| Springboks | Mammal | 2,500,000 | 2008 | IUCN |
| Polecats | Mammal | 2,495,000 | 2017 | W3Ask |
| Impalas | Mammal | 2,000,000 | 2008 | IUCN |
| Dik-diks | Mammal | 1,997,600 | 2008 | IUCN |
| Raccoons | Mammal | 1,600,000 | 2017 | W3Ask |
| Blue wildebeests | Mammal | 1,550,000 | 2008 | IUCN |
| Bats | Mammal | 1,521,300 | 2008 | IUCN |
| Mooses | Mammal | 1,500,000 | 2008 | IUCN |
| Gazelles | Mammal | 1,494,000 | 2008 | IUCN |
| Bushbucks | Mammal | 1,340,000 | 2008 | IUCN |
| Pangolins | Mammal | 1,280,000 | 2017 | W3Ask |
| Pilot whales | Mammal | 1,158,000 | 2006 | Taylor, B. L., Baird, R. |
| Jackals | Mammal | 1,000,000 | 2017 | W3Ask |
| Lamas | Mammal | 1,000,000 | 2015 | IUCN |
| Coyotes | Mammal | 891,000 | 2017 | W3Ask |
| African buffaloes | Mammal | 890,000 | 2008 | IUCN |
| Elephant seals | Mammal | 889,000 | 2010 | IUCN |
| Oribis | Mammal | 750,000 | 2008 | IUCN |
| Plains zebras | Mammal | 750,000 | 2015 | IUCN |
| Pronghorns | Mammal | 700,000 | 2008 | IUCN |
| African leopards | Mammal | 700,000 | 2011 | IUCN |
| Foxes | Mammal | 672,100 | 2001 | IUCN |
| Bottle-nosed dolphins | Mammal | 600,000 | 2006 | IUCN red list |
| Steenboks | Mammal | 600,000 | 2008 | IUCN |
| Kudus | Mammal | 600,000 | 2008 | IUCN |
| Emperor pinguins | Mammal | 595,000 | 2012 | BBC News |
| Guanacos | Mammal | 589,750 | 2008 | IUCN |
| Elephants | Mammal | 550,000 | 2016 | The Guardian |
| American bisons | Mammal | 530,000 | 2008 | IUCN |
| Minky whales | Mammal | 515,000 | 2012 | SCIWC |
| Sea lions | Mammal | 503,958 | 2008 | IUCN |
| Meerkats | Mammal | 500,000 | 2015 | Natural History |
| Koalas | Mammal | 500,000 | 2012 | IUCN |
| Antelopes | Mammal | 492,000 | 2008 | IUCN |
| Gibbons | Mammal | 406,557 | 2008 | IUCN |
| Gemsboks | Mammal | 373,000 | 2008 | IUCN |
| Sunis | Mammal | 365,000 | 2008 | IUCN |
| Hartebeests | Mammal | 362,000 | 2008 | IUCN |
| Vicuñas | Mammal | 347,273 | 2008 | IUCN |
| Platypus | Mammal | 300,000 | 2008 | IUCN |
| Wombat | Mammal | 300,000 | 2008 | Taggart and Robinson |
| Grey wolves | Mammal | 300,000 | 2008 | IUCN |
| Chimpanzees | Mammal | 299,700 | 2008 | IUCN |
| Water chevrotains | Mammal | 278,000 | 2008 | IUCN |
| Mongooses | Mammal | 219,000 | 2017 | W3Ask |
| Lechwes | Mammal | 212,000 | 2008 | IUCN |
| Reedbucks | Mammal | 210,000 | 2008 | IUCN |
| Gorillas | Mammal | 206,680 | 2008 | IUCN |
| Brown bears | Mammal | 200,000 | 2012 | IUCN |
| Waterbucks | Mammal | 200,000 | 2008 | IUCN |
| Geladas | Mammal | 200,000 | 2008 | IUCN |
| Lemurs | Mammal | 197,244 | 2008 | IUCN |
| Martens | Mammal | 187,000 | 2016 | V.G. Monakhov |
| Sitatungas | Mammal | 170,000 | 2008 | IUCN |
| Badgers | Mammal | 152,100 | 2017 | W3Ask |
| Hippopotamus | Mammal | 150,000 | 2008 | IUCN |
| Fennec foxes | Mammal | 150,000 | 2017 | W3Ask |
| Otters | Mammal | 142,640 | 2008 | IUCN |
| Common elands | Mammal | 136,000 | 2008 | IUCN |
| Kangaroo rats | Mammal | 134,000 | 2004 | IUCN |
| Pukus | Mammal | 130,000 | 2008 | IUCN |
| Marmosets | Mammal | 120,000 | 2003 | IUCN |
| Fin whales | Mammal | 119,000 | 2008 | Reilly, S.B.; Bannister, J.L |
| Mountain goats | Mammal | 119,000 | 2008 | IUCN |
| Dall sheeps | Mammal | 116,500 | 2008 | IUCN |
| Belugas | Mammal | 105,348 | 2000 | IUCN |
| Bryde's whales | Mammal | 100,000 | 2016 | AUT |
| Japanese serows | Mammal | 100,000 | 2008 | IUCN |
| Polynesian rats | Mammal | 100,000 | 2011 | Amos W., Nichols H. J |
| Giraffes | Mammal | 97,500 | 2016 | The Guardian |
| Gerenuks | Mammal | 95,000 | 2008 | IUCN |
| Sharpe's grysboks | Mammal | 95,000 | 2008 | IUCN |
| Ibex | Mammal | 90,000 | 2008 | IUCN |
| Hyaenas | Mammal | 77,000 | 2013 | IUCN |
| Orangutans | Mammal | 76,300 | 2008 | IUCN |
| East African oryx | Mammal | 67,000 | 2008 | IUCN |
| Bettongs | Mammal | 63,400 | 2008 | IUCN |
| Blackbucks | Mammal | 50,000 | 2008 | IUCN |
| Killer whales | Mammal | 50,000 | 2013 | IUCN Red List |
| Bonobos | Mammal | 50,000 | 2008 | IUCN |
| Okapis | Mammal | 50,000 | 2013 | Hart |
| Cougars | Mammal | 50,000 | 2008 | IUCN |
| Grizzly bears | Mammal | 45,075 | 2012 | Canadian ministry of forests |
| Peafowls | Mammal | 45,000 | 2005 | IUCN |
| Manatees | Mammal | 43,296 | 2008 | IUCN |
| Macaques | Mammal | 43,269 | 2008 | IUCN |
| Klipspringers | Mammal | 42,000 | 2008 | IUCN |
| Langurs | Mammal | 37,364 | 2008 | IUCN |
| Lynx | Mammal | 37,350 | 1994 | De Beaufort |
| Nyalas | Mammal | 32,000 | 2008 | IUCN |
| Gaurs | Mammal | 30,000 | 2008 | IUCN |
| Pumas | Mammal | 30,000 | 2017 | W3Ask |
| Bongos | Mammal | 28,000 | 2008 | IUCN |
| Blue whales | Mammal | 25,000 | 2008 | IUCN |
| Tamarins | Mammal | 23,400 | 2008 | IUCN |
| Tapirs | Mammal | 22,500 | 2017 | W3Ask |
| Warthog | Mammal | 22,250 | 2016 | Swanepoel et al |
| Gray whales | Mammal | 22,000 | 2008 | IWC Office |
| White rhinoceros | Mammal | 20,150 | 2011 | The Guardian |
| Giant elands | Mammal | 20,000 | 2008 | IUCN |
| Red-eared guenons | Mammal | 20,000 | 2008 | IUCN |
| Lions | Mammal | 20,000 | 2015 | IUCN |
| Saigas | Mammal | 19,020 | 2003 | IUCN |
| Woylies | Mammal | 18,000 | 2011 | IUCN |
| Leopard seals | Mammal | 18,000 | 2008 | IUCN |
| Black wildebeests | Mammal | 18,000 | 2008 | IUCN |
| Grey rheboks | Mammal | 18,000 | 2008 | IUCN |
| Tarucas | Mammal | 17,000 | 2008 | IUCN |
| Right whales | Mammal | 15,423 | 2009 | Kenney, Robert D |
| Jaguars | Mammal | 15,000 | 2011 | WWF |
| Wild yaks | Mammal | 15,000 | 2008 | IUCN |
| Bohead whales | Mammal | 14,510 | 2008 | CDFO |
| Indian leopards | Mammal | 14,000 | 2014 | World Atlas |
| Surilis | Mammal | 13,000 | 2008 | IUCN |
| Anteaters | Mammal | 11,250 | 2017 | W3Ask |
| Sifakas | Mammal | 10,480 | 2008 | IUCN |
| Javan rusas | Mammal | 10,000 | 2008 | IUCN |
| Red pandas | Mammal | 10,000 | 2015 | IUCN |
| Kangaroo mice | Mammal | 10,000 | 2008 | IUCN |
| Red gorals | Mammal | 10,000 | 2008 | IUCN |
| Southern pudús | Mammal | 10,000 | 2008 | IUCN |
| Tasmanian devils | Mammal | 10,000 | 2007 | IUCN |
| African wild dogs | Mammal | 5,300 | 2008 | IUCN |
| Black rhinoceros | Mammal | 4,860 | 2011 | The Guardian |
| Tigers | Mammal | 3,890 | 2016 | John R. Platt |
| Indian rhinoceros | Mammal | 2,850 | 2011 | The Guardian |
| Andean mountain cats | Mammal | 2,500 | 2016 | IUCN |
| Grevy's zebras | Mammal | 2,500 | 2002 | IUCN |
| Darwin's foxes | Mammal | 2,499 | 2004 | Jiménez and McMahon |
| Humpback whales | Mammal | 2,100 | 2014 | WWP |
| Great polar bears | Mammal | 2,050 | 2015 | IUCN |
| Pandas | Mammal | 1,864 | 2014 | WWF |
| Hartmann's mountain zebras | Mammal | 1,300 | 2008 | IUCN |
| Persian leopards | Mammal | 1,290 | 2017 | World Atlas |
| Proboscis monkeys | Mammal | 1,100 | 2000 | IUCN |
| Indochinese leopards | Mammal | 1,000 | 2016 | World Atlas |
| European minks | Mammal | 615 | 2000 | IUCN |
| Sloths | Mammal | 600 | 2017 | W3Ask |
| Black panthers | Mammal | 600 | 2017 | W3Ask |
| Greater bamboo lemurs | Mammal | 500 | 2009 | Wright et al. |
| Cape mountain zebras | Mammal | 500 | 2008 | IUCN |
| Baijis | Mammal | 400 | 1982 | Zhou |
| Sumatran rhinoceros | Mammal | 275 | 2011 | The Guardian |
| Javan leopards | Mammal | 250 | 2017 | World Atlas |
| Amur leopards | Mammal | 70 | 2017 | World Atlas |
| Arabian leopards | Mammal | 50 | 2017 | World Atlas |
| Javan rhinoceros | Mammal | 44 | 2011 | The Guardian" |
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