18 Lists of placental mammals

This list contains the placental mammals in the order Chiroptera. There are an estimated 1,300 species of bat.

Canidae is a family of mammals in the order Carnivora, which includes domestic dogs, wolves, coyotes, foxes, jackals, dingoes, and many other extant and extinct dog-like mammals. A member of this family is called a canid; all extant species are a part of a single subfamily, Caninae, and are called canines. They are found on all continents except Antarctica, having arrived independently or accompanied human beings over extended periods of time. Canids vary in size, including tails, from the 2 meter gray wolf to the 46 cm (18 in) fennec fox. Population sizes range from the Falkland Islands wolf, extinct since 1876, to the wolf, whose domestic dog subspecies has a worldwide population of over 1 billion. 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. Most species are social animals, living together in family units or small groups and behaving cooperatively. Typically, only the dominant pair in a group breeds, and a litter of young is reared annually in an underground den. Canids communicate by scent signals and vocalizations. One canid, the domestic dog, entered into a partnership with humans at least 14,000 years ago and today remains one of the most widely kept domestic animals.

Felidae is a family of mammals in the order Carnivora, colloquially referred to as cats. A member of this family is called a felid. The term "cat" refers both to felids in general and specifically to domestic cats. The characteristic features of cats have evolved to support a carnivorous lifestyle, with adaptations for ambush or stalking and short pursuit hunting. They have slender muscular bodies, strong flexible forelimbs and retractable claws for holding prey, dental and cranial adaptations for a strong bite, and often have characteristic striped or spotted coat patterns for camouflage.

Herpestidae is a family of mammals in the order Carnivora, composed of the mongooses and the meerkat. A member of this family is called a mongoose or a herpestid. They are widespread primarily throughout Africa and south Asia, and are found primarily in forests, savannas, shrublands, and grasslands, though some species can be found in wetlands or deserts. Most mongooses are 30–60 cm (12–24 in) long, plus a 20–40 cm (8–16 in) tail, though the Ethiopian dwarf mongoose can be as small as 18 cm (7 in) plus a 12 cm (5 in) tail, and the white-tailed mongoose can be up to 104 cm (41 in) plus a 47 cm (14 in) tail. Most species do not have population estimates, though one, the Liberian mongoose, is classified as vulnerable with a population size of around 5,000. No herpestid species have been domesticated.

The list of leading Thoroughbred racehorses contains the names of undefeated racehorses and other horses that had an outstanding race record in specific categories. Note though that many champions do not appear on the list as an unexpected defeat may be caused by many factors such as injury, illness, going, racing tactics and differences in weight carried, the latter being particularly significant in North America and Australia where handicaps are common even at the highest level of racing.

Lists of horse-related topics are lists related to horses. They include lists of breeds, related species, individual horses, race horses, horse race results and horse shows

This list contains the species in the order Lagomorpha.

Mephitidae is a family of mammals in the order Carnivora, which comprises the skunks and stink badgers. A member of this family is called a mephitid. The skunks of the family are widespread across the Americas, while the stink badgers are in the Greater Sunda Islands of southeast Asia. Species inhabit a variety of habitats, though typically grassland, forest, and shrubland. Most mephitids are 20–50 cm (8–20 in) long, plus a 10–40 cm (4–16 in) tail, though the pygmy spotted skunk can be as small as 11 cm plus a 7 cm tail, and some striped skunks can be up to 82 cm plus a 40 cm tail. No estimates have been made for overall population sizes of any of the species, but two species are classified as vulnerable. Mephetids in general are not domesticated, though skunks are sometimes kept as pets.

Mustelidae is a family of mammals in the order Carnivora, which includes weasels, badgers, otters, ferrets, martens, minks, and wolverines, and many other extant and extinct genera. A member of this family is called a mustelid; Mustelidae is the largest family in Carnivora, and its extant species are divided into eight subfamilies. They are found on all continents except Antarctica and Australia, and are a diverse family; sizes range, including tails, from the widespread 17 cm (7 in) least weasel to the 1.8-meter (6 ft) giant otter of Amazonian South America. Habitats vary widely as well, from the arboreal marten to the fossorial European badger to the marine sea otter. Population sizes are largely unknown, though one species, the sea mink, was hunted to extinction in 1894 and several other species are endangered. Some types have been domesticated, e.g. the ferret, a subspecies of the European polecat, and some populations of the South American tayra. Mustelidae is one of the oldest families in Carnivora; early mustelids first appeared around 28–33 million years ago.

This is a list of notable pigs.

Pinnipedia is an infraorder of mammals in the order Carnivora, composed of seals, sea lions, and the walrus. A member of this group is called a pinniped or a seal. They are widespread throughout the ocean and some larger lakes, primarily in colder waters. Pinnipeds range in size from the 1 m and 45 kg (99 lb) Baikal seal to the 5 m (16 ft) and 3,200 kg (7,100 lb) male southern elephant seal, which is also the largest member of the order Carnivora. Several species exhibit sexual dimorphism. Most species do not have population estimates, though seven are classified as endangered with population counts as low as 300, and two, the Caribbean monk seal and the Japanese sea lion, went extinct in the 20th century.

List of primates contains the species in the order Primates and currently contains 16 families and 72 genera. See list of fossil primates for extinct species and List of lemur species.

Procyonidae is a family of mammals in the order Carnivora, which includes raccoons, coatis, olingos, kinkajous, ring-tailed cats, and cacomistles, and many other extant and extinct mammals. A member of this family is called a procyonid. They are native to North and South America, though the common raccoon has been introduced to Europe, western Asia, and Japan. Procyonid habitats are generally forests, though some are found in shrublands and grasslands as well. The ring-tailed cat has a varied range including rocky areas and deserts as well as forests, and the common raccoon is widespread in urban environments. Species range in size from around 30–65 cm (12–26 in) long, plus a tail generally as long again. Population sizes are largely unknown, though the Cozumel raccoon is critically endangered, with around 200 individuals left, and the Eastern mountain coati is endangered. No procyonid species have been domesticated, though raccoons are sometimes kept as pets.

Rodents are animals that gnaw with two continuously growing incisors. Forty percent of mammal species are rodents, and they inhabit every continent except Antarctica.

This list contains the species in the order Soricomorpha. Soricomorpha is no longer considered a valid taxon; it is now knoiwn to be paraphyletic, since erinaceids are the sister group of shrews.

The World's 25 Most Endangered Primates is a list of highly endangered primate species selected and published by the International Union for Conservation of Nature Species Survival Commission Primate Specialist Group, the International Primatological Society (IPS), and Conservation International (CI). The 2012–2014 list added the Bristol Conservation and Science Foundation (BCSF) to the list of publishers. The IUCN/SSC PSG worked with CI to start the list in 2000, but in 2002, during the 19th Congress of the International Primatological Society, primatologists reviewed and debated the list, resulting in the 2002–2004 revision and the endorsement of the IPS. The publication has since been a joint project between the three conservation organizations and has been revised every two years following the biannual Congress of the IPS. Starting with the 2004–2006 report, the title changed to "Primates in Peril: The World's 25 Most Endangered Primates". That same year, the list began to provide information about each species, including their conservation status and the threats they face in the wild. The species text is written in collaboration with experts from the field, with 60 people contributing to the 2006–2008 report and 85 people contributing to the 2008–2010 report. The 2004–2006 and 2006–2008 reports were published in the IUCN/SSC PSG journal Primate Conservation, while the 2008–2010 and 2010-2012 report were published as independent publications by all three contributing organizations.

Ursidae is a family of mammals in the order Carnivora, which includes the giant panda, brown bear, and polar bear, and many other extant and extinct mammals. A member of this family is called a bear or an ursid. They are widespread across the Americas and Eurasia. Bear habitats are generally forests, though some species can be found in grassland and savana regions, and the polar bear lives in arctic and aquatic habitats. Most bears are 1.2–2 m (4–7 ft) long, plus a 3–20 cm (1–8 in) tail, though the polar bear is 2.2–2.44 m (7–8 ft) long, and some subspecies of brown bear can be up to 2.8 m (9 ft). Weights range greatly from the sun bear, which can be as low as 35 kg (77 lb), to the polar bear, which can be as high as 726 kg (1,600 lb). Population sizes vary, with six species classified as vulnerable with populations as low as 500, while the brown bear has a population of over 100,000 and the American black bear around 800,000. Many bear species primarily eat specific foods, such as seals for the polar bear or termites and fruit for the sloth bear, but with the exception of the giant panda, which exclusively eats bamboo, ursids are omnivorous when necessary. No ursid species have been domesticated, though some bears have been trained for entertainment.

Viverridae is a family of mammals in the order Carnivora, composed mainly of the civets and genets. A member of this family is called a viverrid. They are widespread primarily throughout Africa, India, and southeast Asia, and are found primarily in forests, shrublands, and grasslands, though some species can be found in savannas or wetlands. Most viverrids are 40–65 cm long, plus a 35–60 cm tail, though the West African oyan can be as small as 30 cm plus a 35 cm tail, and some binturongs can be up to 96 cm plus a 89 cm tail. Most species do not have population estimates, though three viverrids are classified as endangered, and one, the Malabar large-spotted civet, is classified as critically endangered with a population size of around 200. No viverrid species have been domesticated.