This is a collection of lists of mammal species by the estimated global population, divided by

orders Order, ORDER or Orders may refer to: * Categorization, the process in which ideas and objects are recognized, differentiated, and understood * Heterarchy, a system of organization wherein the elements have the potential to be ranked a number of d ...

. Lists only exist for some orders; for example, the most diverse order -

rodent Rodents (from Latin , 'to gnaw') are mammals of the order Rodentia (), which are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws. About 40% of all mammal species are rodents. They are na ...

s - is missing. Much of the data in these lists were created by the

International Union for Conservation of Nature The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natu ...

(IUCN) Global Mammal Assessment Team, which consists of 1700 mammalogists from over 130 countries. They recognize 5488 species in the class. These lists are not comprehensive, as not all mammals have had their numbers estimated. For example, a live specimen of the

spade-toothed whale The spade-toothed whale (''Mesoplodon traversii'') is a very little-known species, the rarest species of beaked whale. It was first named from a partial jaw found on Pitt Island, New Zealand, in 1872; reported and illustrated in 1873 by James He ...

was first observed in December 2010, and the event only recognized as such in November 2012; no estimate yet exists for the global population. The accuracy of the quote numbers may only be an

order of magnitude An order of magnitude is an approximation of the logarithm of a value relative to some contextually understood reference value, usually 10, interpreted as the base of the logarithm and the representative of values of magnitude one. Logarithmic dis ...

. It is estimated that the total number of wild mammals in the world is about 130

billion Billion is a word for a large number, and it has two distinct definitions: *1,000,000,000, i.e. one thousand million, or (ten to the ninth power), as defined on the short scale. This is its only current meaning in English. * 1,000,000,000,000, i.e ...

Lists by taxonomic order

* List of even-toed ungulates by populationbos species, bovidae artiodactyls, suiformes, camelidae species, cervidae artiodactyls, giraffa species, hippopotami. **

List of cetacean species Cetacea is an infraorder that comprises the 94 species of whales, dolphins, and porpoises. It is divided into toothed whales (Odontoceti) and baleen whales (Mysticeti), which diverged from each other in the Eocene some 50 million years ago (mya ...

with population estimatesdolphins, porpoises, whales. *

List of odd-toed ungulates by population This is a list of odd-toed ungulate species by estimated global population. This list misses data on Tapirus terrestris, which has not yet been estimated. See also *Lists of mammals by population *Lists of organisms by population References< ...

equines, rhinoceros, tapirs. *

List of carnivorans by population This is a list of estimated global populations of Carnivora species. This list is not comprehensive, as not all carnivorans have had their numbers quantified. See also *Lists of organisms by population *Lists of mammals by population Refer ...

domestic and wild feliformians and caniformians, pinnipeds, ursid species, musteloidea species, herpestidae species, etc. **

List of felidaes by population A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College, an undergraduate division of the Jewish Theological Seminary of America * SC Germania List, German rugby union ...

Cats, Tigers and Lions. *

List of bats by population This is a list of bat species by global population. While numbers are estimates, they have been made by the experts in their fields. For more information on how these estimates were ascertained, see Wikipedia's articles on population biology and p ...

Chiropterans. *

List of primates by population This is a list of primate species by estimated global population. This list is not comprehensive, as not all primates have had their numbers quantified. See also * Lists of organisms by population *Lists of mammals by population *Human popul ...

Hominoideans (including humans and chimpanzees), lemurs, old world and new world primates. *

List of elephant species by population This is a list of estimated global populations of Proboscidean species, including their delineated subspecies. This list is generally comprehensive, but there is also uncertainty to some estimations. See also *Lists of organisms by populatio ...

Elephants. *

List of marsupials by population This is a list of estimated global populations of Marsupials species. This list is not comprehensive, as not all Marsupials have had their numbers quantified. See also *Lists of organisms by population *Lists of mammals by population *Lists o ...

Wombats, koalas and kangaroos.

References

cap {{DEFAULTSORT:Mammals Biology-related lists