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mammals

Mammals are an important group of vertebrates characterized by the presence of mothers feeding their offspring. Notable characteristics of mammals include lactation, body hair, endothermy (warm-blooded animals), and a four-chambered heart. There are many species of mammals, living in almost all ecosystems on Earth, from the deep sea to the mountains, from tropical rainforests to the cold polar regions.

  • scientific name:Mammalia

  • Features

    • suckle:Females have mammary glands that secrete milk to feed their young.

    • Body hair:Most mammals are covered with hair.

    • Endothermic:Maintaining a constant body temperature through metabolism.

    • Four-chambered heart:Mammals have four-chambered hearts to ensure efficient oxygen delivery.

    • viviparous:Most mammals reproduce by giving birth to live young, but some species, such as monotremes (e.g. the platypus), lay eggs.

  • Habitat:Almost all habitats on Earth, including land, ocean, fresh water, polar regions, etc.

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Mammal classification table

Mammals are numerous and can be subdivided based on different biological characteristics. Mammals are roughly divided into three subclasses:

  1. Monotremata: Oviparous mammals.

  2. Marsupialia: Kangaroos, koalas, etc., whose young continue to develop in a pouch outside the mother's body.

  3. Eutheria: Viviparous mammals, the most abundant species, including humans, lions, whales, etc.

The following is a detailed classification table of mammals, including all orders, families, genera and typical animals:

sortOrderFamilyGenusExamples
MonotremataMonotremataOrnithorhynchidaeOrnithorhynchusPlatypus, Echidna


TachyglossidaeEchidnaEchidna
MarsupialiaMarsupialiaMacropodidaeMacropusKangaroos, wombats, possums


PhascolarctidaePhascolarctoskoala


DasyuridaeDasyurusBandicoot, Tasmanian devil
EutheriaCarnivoraCanidaeCanisWolf, dog, fox


FelidaeFelisHouse cat, lion, tiger


UrsidaeUrsusBlack bear, brown bear, polar bear

PerissodactylaEquidaeEquusHorse, donkey, zebra


RhinocerotidaeRhinocerosWhite rhino, black rhino


TapiridaeTapirusTapirus

ArtiodactylaBovidaeBosCattle, antelopes, sheep


CervidaeCervusDeer, reindeer, sika deer


SuidaeSusWild boar, domestic pig

CetaceaBalaenidaeMegapteraHumpback whale, blue whale


DelphinidaeDelphinusDolphins, killer whales

PrimatesCercopithecidaePongoOrangutans, gibbons, monkeys


HominidaeHomoHumans, chimpanzees, orangutans

RodentiaSciuridaeSciurusSquirrels, Ground Squirrels


CastoridaeCastorbeaver


MuridaeMusHouse mouse, vole

ChiropteraVespertilionidaeMyotisSmall bat, big bat

LagomorphaLeporidaeOryctolagusRabbit, hare

Characteristics and Adaptations of Mammals

Mammals are one of the most diverse groups in the biological world. Here are the main characteristics of mammals and how they adapt:


1. Breastfeeding

A notable feature of mammals is that mothers secrete milk through their mammary glands to feed their offspring. This allows mammal cubs to receive adequate nutritional support after birth, increasing their survival rate.


2. Body hair

Almost all mammals have body hair, which not only helps to keep warm, but also plays a camouflage or display function in some species. For example, the white hair of polar bears helps them camouflage in the snow and reduce the risk of being discovered by prey.


3. Homeothermy

Mammals maintain a stable body temperature through metabolism, which allows mammals to maintain a suitable temperature regardless of changes in the outside temperature. This feature allows mammals to survive in a variety of environments, including extreme environments such as polar regions and deserts.


4. Viviparity

Most mammals reproduce by giving birth to live young, which allows the embryo to receive more stable nutritional support in the mother's body and be more viable after birth. Some species, such as kangaroos and koalas, adopt marsupial parenting.


5. Diet

Mammals have a variety of diets, from herbivorous to carnivorous and omnivorous. Some species (such as bats) have even evolved to suck blood. Different diets allow mammals to find living space in a variety of ecological environments.


Summary: Mammals are the most advanced animals with the most perfect physiological functions. There are more than 4,000 existing mammals. Almost all mammals are warm-blooded. Feeding their offspring with breast milk is one of their most notable characteristics. Mammals include nearly 30 orders, including Monotremes, Carnivores, Primates, Perissodactyla, and Artiodactyla.

Carnivora Primates Rodents Chiroptera Eulipotyphla Ungulata Cetacea Lagoiformes Pholidota Proboscidea Monotremata
Ochotona erythrotis

Ochotona erythrotis

Ochotona erythrotis,Red-eared rabbit

Features:The color of the coat on the body of the red-eared pika changes significantly with the seasons.

Red-eared pika belongs to the subgenus <Conothoa>. There is some controversy in classification. Red-eared pika was once merged into red pika (<Ochotona rultila>). Liu Shaoying et al. (2016) confirmed it as an independent species. Red-eared pika is the most beautiful pika. It has a specia...

Ochotona huangensis xunhuaensis

Ochotona huangensis xunhuaensis

Ochotona huangensis xunhuaensis

Features:

Xunhua pika, also known as Qinling pika, belongs to the subgenus Alienauroa. It was first published as a subspecies of Tibetan pika (O. thibetana), and was later considered a synonym of Ochotona syrinx. Liu Shaoying et al. (2016) classified it as an independent species because of its tragus, so it w...

Ochotona huanglongensis

Ochotona huanglongensis

Ochotona huanglongensis

Features:

Huanglong Pika belongs to the subgenus Alienauroa. It is mainly distributed in forests below 3100m above sea level in the Minshan Mountains. Low altitude. It prefers rocky and humid habitats. This species is also one of the new species published by Liu Shaoying et al. (2016)....

Lycalopex culpaeus

Lycalopex culpaeus

Lycalopex culpaeus,Lobo Andino、Culpeo,Cobain fox, Ecuadorian jackal

Features:It is the second largest canid in South America, second only to the maned wolf.

Mountain fox (scientific name: Lycalopex culpaeus) is also known as Lobo Andino and Culpeo, and has 6 subspecies.Mountain foxes have well-developed hearing and smell, are cunning, and are agile. They like to act alone. They hunt at night. They usually come out at night and sleep in caves during the...

Cerdocyon thous

Cerdocyon thous

Cerdocyon thous,Crab-eating Fox

Features:A fox that can suck crabs

Crab-eating fox (scientific name: Cerdocyon thous) is called Crab-eating Fox in foreign language. There are 5 subspecies.Crab-eating fox is mainly active at night and also active at dusk, spending the day in caves dug by different animals. Hunting alone or living in pairs. They are monogamous, usual...

Urocyon littoralis

Urocyon littoralis

Urocyon littoralis,Channel Islands Fox,海岸灰狐,短尾狐,岛狐,海峡群岛狐,海岛灰狐

Features:It is a species endemic to the Channel Islands.

The Channel Islands Fox (scientific name: Urocyon littoralis) is a small fox with 6 subspecies.The Channel Islands Fox is not afraid of humans, is at the top of the food chain on the island, and has no natural predators. Generally docile and easy to tame. They use smell, hearing and visual signals t...

Urocyon cinereoargenteus

Urocyon cinereoargenteus

Urocyon cinereoargenteus,Grey Fox

Features:The fur is coarse, gray on the upper part, golden on the lower part, and white on the belly.

Grey Fox (scientific name: Urocyon cinereoargenteus) is also known as Grey Fox in English. There are 16 subspecies.The gray fox's nesting territory is 3-5.6 square kilometers. The short-distance running speed can reach 45 kilometers per hour. Good at climbing trees, the tree-climbing ability is...

Otocyon megalotis

Otocyon megalotis

Otocyon megalotis,Bat-eared fox,Bat-eared fox, Cape fox

Features:Bat-wing ears

The big-eared fox (scientific name: Otocyon megalotis) has bat-wing-like ears that can be up to 14 cm long. There are two subspecies. In fact, its species name "megalotis" comes from the Greek words "mega" and "otus", which means big ears.In the Serengeti Plain, 85% of...

Vulpes zerda

Vulpes zerda

Vulpes zerda,fennec,Fennec Fox,Big-eared fox, desert fox

Features:It is the smallest fox species and ranked first in the list of the world's cutest species selected by CNN in 2013.

Fennec fox (scientific name: Vulpes zerda) is also known as fennec or Fennec Fox in English. It is one of the smallest canids in the world, about the size of a kitten, and has no subspecies.Hot days and cold nights are common in the North African desert, and the small fennec fox is well adapted to t...

Vulpes velox

Vulpes velox

Vulpes velox,Swift Fox

Features:The savannah fox is the smallest wild canid in North America.

The veld fox (scientific name: Vulpes velox) is also known as the Swift Fox in English. It has three subspecies.Steppe foxes are agile and can run up to 50 kilometers per hour. Their swift running helps them catch food and avoid being hunted by other predators. Hiding in underground caves is another...

Vulpes rueppellii

Vulpes rueppellii

Vulpes rueppellii,Rüppell's Fox,Lupper fox, Lupper fox

Features:Usually reddish to gray with a line of black spots from eyes to nose and a white tail tip.

Rüppell's Fox (scientific name: Vulpes rueppellii) is also known as Rüppell's Fox in English. There are 5 subspecies.Rüppell's Fox is most active at dusk and throughout the night, spending most of its time in caves and crevices. These dens are occupied for an average of 4-5 days befor...

Vulpes pallida

Vulpes pallida

Vulpes pallida,Pale Fox,African Corso Fox

Features:Slender, low body and relatively short limbs, narrow muzzle, long ears with slightly rounded tips

Pale Fox (scientific name: Vulpes pallida) is also known as Pale Fox in foreign languages. There are 5 subspecies.Pale Fox is mainly active at night. It is a social animal, usually living in a small family group consisting of a pair of adult males and females and their children. They like to dig hol...

Vulpes macrotis

Vulpes macrotis

Vulpes macrotis,Kit Fox, Desert Fox,North American giant-eared fox, sensitive fox, North American corsac fox

Features:Able to run at speeds of up to 40 km/h over short distances

Kit Fox (scientific name: Vulpes macrotis), also known as Kit Fox and Desert Fox, is one of the smallest foxes in America, with no subspecies.Kit Fox likes to build dens in places with loose soil. Spend most of their time in dens, digging their own burrows or using those of prairie dogs, other roden...

Vulpes chama,

Vulpes chama,

Vulpes chama,Cape Fox,silverback fox, cape fox, cape fox

Features:They mainly feed on insects and are very intelligent.

Cape fox (scientific name: Vulpes chama) is also known as Cape Fox, and has no subspecies.Cape foxes are mainly nocturnal, although cubs play outside the cave during the day. The species forages alone or in pairs. Cape foxes are not very territorial, with overlapping ranges that vary from 1.0-4.6 sq...

Vulpes cana

Vulpes cana

Vulpes cana,Blanford's Fox

Features:The nose is thin and the ears are large, which can be used to dissipate heat.

Afghan fox (scientific name: Vulpes cana) is also known as Blanford's Fox, and has no subspecies.Strictly speaking, the Afghan fox is a nocturnal animal and a solitary hunter. Most of the time, the Afghan fox hunts alone. Even mating pairs tend to forage independently. There is no seasonal varia...

Vulpes bengalensis

Vulpes bengalensis

Vulpes bengalensis,Bengal Fox, Indian Fox

Features:A fox species endemic to the Indian subcontinent

Bengal fox (scientific name: Vulpes bengalensis) is also known as Bengal Fox, Indian Fox, and has no subspecies.The preferred habitat of the Bengal fox is small open grasslands and thorny bushes, and they seem to avoid steep mountains and endless grasslands. Recent research reports show that the Ben...

Speothos venaticus

Speothos venaticus

Speothos venaticus,Bush Dog,bush dog, water dog, forest dog

Features:It has a broad head, a short mouth, and underdeveloped webbed feet. It is a canine species unique to South America.

Bush Dog (scientific name: Speothos venaticus) is also known as Bush Dog in English. It has 3 subspecies.Taxonomic Notes Because Latin is usually used as the official language for animal classification to describe animals, the species and species names of the bush dog are very interesting. The descr...

Lycaon pictus

Lycaon pictus

Lycaon pictus,African Wild Dog,African hunting dog, tricolor jackal, African wild dog

Features:The fur color is relatively messy, and the teamwork and endurance are good.

African wild dog, also known as Lycaon pictus, has five subspecies.The territory of African wild dogs ranges from 200 to 2,000 square kilometers. In the past, when they were more numerous, each group had about 40 members, and the largest group ever recorded had 100 members. Generally, each group has...

Dusicyon australis

Dusicyon australis

Dusicyon australis

Features:The world's southernmost wolf has gone extinct

The Falkland Islands Wolf (scientific name: Dusicyon australis) is a species of Canidae that became extinct in 1876 (on West Falkland Island). The closest relative is the South American gray fox that lives in Patagonia, Argentina, which was also introduced to the Falkland Islands in modern times.Bef...

Chrysocyon brachyurus

Chrysocyon brachyurus

Maned wolf, Brazilian wolf, South American wolf

Features:Has a long golden-red "coat" and a distinctive mane that can stand upright

Maned wolf (scientific name: Chrysocyon brachyurus), also known as Maned wolf in English, is a rare animal of the genus Chrysocyon in the family Canidae, with no subspecies.Male and female maned wolves have a relatively fixed mate relationship and usually share a territory (about 27 square kilometer...

Canis simensis

Canis simensis

Simian jackal, steppe jackal, Abyssinian jackal, Simian mountain jackal

Features:Distinctive reddish brown fur

The Ethiopian Wolf (scientific name: Canis simensis) is a small dog with two subspecies.Every morning, Ethiopian wolf packs spend several minutes performing a greeting ritual, sniffing, barking, biting, scratching, licking, and staring at each other. This daily ritual strengthens the unity of the wo...