List of largest mammals

Tenrecs and allies (Afrosoricida)

• The largest of these insectivorous mammals is the giant otter shrew, native to Central Africa. This species can weigh up to and measure in total length.
• The larger of the two species of bibymalagasy, extinct tenrec relatives from Madagascar, is estimated to have weighed from 10 to 18 kilograms.

  Even-toed ungulates (Artiodactyla)

• The largest species in terms of weight is the hippopotamus, native to the rivers of sub-Saharan Africa. They can attain a size of, long and tall. Prehistoric hippos such as H. gorgops and H. antiquus rivaled or exceeded the modern species as the largest members of the family and order to ever exist.
• The longest-bodied species, and tallest of all living land animals, is the giraffe, measuring up to tall to the top of the head, and despite being relatively slender, reaching a top weight of.
• The largest extant representative of the bovids, a diverse and well-known family, is the Asian forest-dwelling gaur, in which bulls can weigh up to , in total length and stand at the shoulder. The wild yak reaches in height, and a weight of. The living American bison of North America is long, the tail adding. Shoulder heights in the species can range from. Weights can range from. The European bison may be less heavy than the American species, but would exceed heights at withers with the tallest record of. When raised in captivity and farmed for meat, the bisons can grow unnaturally heavy and the largest semidomestic American bison weighed and the heaviest European bison weighed about. The heads and forequarters of American species are massive, and both sexes have short, curved horns that can grow up to long, which they use in fighting for status within the herd and for defense. Wild water buffaloes of Asia are larger and heavier than domestic buffaloes, and weigh from. Their head-to-body-length is with a tail long, and a shoulder height of. Both sexes carry horns that are heavy at the base and widely spreading up to The extinct giant bison may be the largest bovid in the fossil record, with an estimated shoulder up to and a weight over. Pelorovis also reached 2,000 kg in weight. Domestic cattle are usually smaller, although obese steers have been reported to weigh up to. The largest antelope is the giant eland from Africa. They are typically between in head-and-body length, stand approximately at the shoulder, and weigh.
• The largest species in the pig family is generally the giant forest hog, a native of the African rainforests, at up to, in length and high at the shoulder. Although wild boars have reportedly reached historically, especially the Manchurian subspecies and obese domestic pigs which have been weighed at. The largest wild suid to ever exist was Kubanochoerus gigas, having measured up to and stood more than tall at the shoulder.
• The largest living cervid is the moose, particularly the Alaskan subspecies, verified at up to, a total length of and a shoulder height of. The largest deer of all time was the broad-fronted moose. The extinct Irish elk and the stag-moose were of similar size to the Alaskan moose. However, the Irish elk could have antlers spanning up to across, about twice the maximum span for a moose's antlers.
• The largest members of the camel family are either the bactrian camel, which is still wild in the steppe of central Asia, or the similarly sized dromedary, which no longer exists as a purely wild species but is widespread in the Middle East as a domestic animal, with a large introduced feral population in Australia. Both camels can weigh up to, in total length, tall at the shoulder and a height of at the hump. Several giant camels are known from fossils, the previous record holders, Gigantocamelus and Titanotylopus from North America, both possibly reached and a shoulder height of over. An extinct species of camel from Syria, also known as the "Syrian camel", may have been even larger, at an estimated shoulder height of 3.6 or even 4 m.

  Whales (Cetacea)

• The largest whale is the blue whale, a baleen whale. The longest confirmed specimen was 33.58 m in length and the heaviest was 190 tonnes. Its closest competitors are also baleen whales, the fin whale, which can reach a size of in length and weight of 109 tonnes, and the bowhead and North Pacific right whale, both measured up to and estimated at that length to weigh about 133 tonnes.
• The largest toothed whale is the sperm whale, bulls of which usually range up to long and a mass of 50 tonnes.
• The orca or killer whale is the largest species of the oceanic dolphin family. The largest orca ever recorded was a male off the coast of Japan, measuring long and weighed 10 tonnes. File:Orca porpoising.jpg|thumb|The orca is the largest oceanic dolphin.
• The largest porpoise is the Dall's porpoise, at up to and in length.
• The largest beaked whale is the Baird's beaked whale at up to 14 tonnes and long.
• The largest of the beluga and narwhal is the beluga whale. Adult male beluga whales can range from, while the females measure.
• The largest river dolphin is the Amazon river dolphin from Amazon basin at a length of, depending on subspecies. Females are typically larger than males. The largest female Amazon river dolphins can range up to long.
• Fragmentary fossils of extinct rorquals from the Pliocene epoch suggest they rivaled the size of the largest whales today.
• Perucetus, the largest Archaeoceti, has an estimated length exceeding 17.0–20.1 meters and weight ranging from 85–340 t which also rivaled the size of the largest whales today. However, later studies proposed a much smaller size of 17 m to 20 m and 98-114 t.

  Carnivorans (Carnivora)

• The largest carnivoran as well as the largest pinniped is the southern elephant seal, attaining sizes up to 5,000 kg in weight and 6.9 m in length.
• The largest living land carnivoran, on average, is the polar bear. It can reach a shoulder height of over and total length of as much as. The heaviest wild polar bear weight recorded was. The Kodiak bear, a brown bear subspecies, rivals the polar bear in size, but is slightly smaller. It has a similar body length with the largest confirmed wild specimen weighing. The largest bear, and possibly the largest known mammalian land carnivore of all time, was Arctotherium angustidens. The largest specimen yet found is estimated to have weighed up to and to have stood up to tall on the hind-limbs
• The largest living species of the family Felidae is the tiger, with reports of males up to in the wilderness and captivity, respectively. Captive ligers, hybrids between lions and tigers, can grow up to non-obese weights over.
• Among the largest members of the family Felidae were the extinct American lion, averaging, the sabertooth Smilodon populator, of which the largest males might have exceeded, and sabertooths of genus Adeilosmilus, with an estimated mass of and the Ngangdong tiger, estimated to have weighed up to
• In the wilderness, the largest living member of Canidae is the gray wolf. The largest specimens from the Mackenzie Valley wolf or the Eurasian wolf weigh up to and measure up to in total length and tall at the shoulder. Eurasian wolves from the Russian area have even been reported to weigh as much as, though these figures require verification. Domestic dogs however can occasionally grow heavier, up to.
• The largest known canid is an extinct member of subfamily Borophaginae, Epicyon haydeni. The largest known specimen of this species weighed an estimated.
• The largest and most diverse family of carnivores, the mustelids, reaches their maximum size in the sea otter of the North Pacific coasts, at up to, and the giant otter of the Amazonian rainforests, at up to in total. The largest mustelid to ever exist was likely the odd cat-like Ekorus from Africa, about the size of a modern leopard and filling a similar ecological niche before big cats came to the continent. Another contender for largest of this family is the wolverine-like Megalictis, which according to older estimates could have reached the size of a modern black bear. Newer estimates, however, significantly downgrade its size, although, at a maximum weight more than twice that of a wolverine, it is larger than most living mustelids.
• The largest species in the mongoose family is the African white-tailed mongoose, at up to and long.
• The largest species in the viverrid family is the Asian binturong, at up to and long, about half of which is tail. The largest viverrid known to have existed is Viverra leakeyi, which was around the size of a modern wolf or small leopard at.
• The largest modern species in the hyena family is the spotted hyena of sub-Saharan Africa, at up to a maximum weight of. Spotted hyenas can range up to in total length and tall at the shoulder. The largest fossil hyena is the lion-sized Pachycrocuta, estimated at.
• The largest living procyonid is the raccoon of North America, having a body length of and a body weight of. The extinct Chapalmalania of South America was the largest known member of this family, about in body length.
• The largest skunk is generally considered the striped skunk, which can weigh up to and reaches lengths of up to. The American hog-nosed skunk is longer, reaching lengths of up to, but is usually less heavy, at up to.

  Bats (Chiroptera)

• The large flying fox is generally reported as the largest bat. Its wingspan has been verified to and may possibly reach. In weight it is surpassed by the closely related Indian flying fox, which is the heaviest bat at up to. A few other relatively poorly known species of flying foxes may match these, but few measurements are available.
• The spectral bat of the Neotropics, at up to, long and about in wingspan, is the largest member of the family Phyllostomidae and is also believed to be the largest member of the microbat suborder.
• The great evening bat, at long with an average wingspan of and a weight of, is the largest vesper bat.