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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
Ovis ammon ammon

Ovis ammon ammon

Ovis ammon ammon,Altai Argali wild sheep,Altai Argali,Argali sheep, Altai argali, Siberian argali, Altai sheep

Features:The world's largest wild argali sheep, with an average horn length of 1.5 meters

Altai Argali wild sheep is a typical mountain animal.The 2011 "Handbook of World Mammals" (THE MAMMALS OF THE WORLD) identified the nine subspecies of argali as nine different species. The February 25, 2021 edition of China's "National Key Protected Wildlife List" also adopte...

Pseudois nayaur

Pseudois nayaur

Pseudois nayaur,Yayang, Banyang, Shiyang, Qingyang, Mountain Sheep, Argali, Lanyang, Qianna, Nawa, Gongna

Features:The sheep that is best at "flying over eaves and walls"

Blue Sheep, also known as Blue Sheep in English, has two subspecies. Its shape is between sheep and goats, and its appearance does have some characteristics of both types of sheep. In terms of body shape, Blue Sheep is very similar to sheep, but its horns are not spiraled, but similar to those of go...

Capra sibirica

Capra sibirica

Capra sibirica,Siberian Ibex,Íbice asiático,Asiatischer Steinbock, Sibirischer Steinbock,Yangir Yamaa,Siberian ibex, Asian antelope, red sheep, hanging sheep, Himalayan goat, Asiatic wild goat

Features:The goat with the longest horns in the world

The Siberian Ibex, with four subspecies, is a typical wild goat.Siberian Ibex is active at dawn and dusk and likes to move in groups. They are very good at climbing and jumping. Their hooves are very solid, with flexible heel joints and pliers-like toes, which enable them to run freely among the ste...

Hemitragus jemlahicus

Hemitragus jemlahicus

Hemitragus jemlahicus,Himalayan Tahr,Long-wool sheep, Tahr sheep

Features:It was discovered in my country in 1974.

The Himalayan Tahr sheep has three subspecies. In the first half of 1974, Cai Guiquan, Wang Zuxiang from the Qinghai Provincial Institute of Biology and Cao Junhe from the Beijing Natural History Museum first discovered the Himalayan Tahr sheep in the Quxiang area of the Boqu River Valley in the Tib...

Naemorhedus griseus

Naemorhedus griseus

Naemorhedus griseus,Chinese Goral、Long-tailed goral,South China goral, gray goral, North China goral, Siberian goral, Sichuan goral

Features:They are alert by nature, with extremely keen vision and hearing.

Chinese Goral, also known as Chinese Goral in English, has two subspecies and is a typical forest-dwelling mammal.From the name, the Chinese goral seems to be an animal unique to my country, but in fact they are not only distributed in my country, but also in India, Thailand, Myanmar and other count...

Grey Goral

Grey Goral

Grey Goral,Himalayan Goral

Features:It is the earliest species in the genus Goral to be named.

Grey Goral, also known as the Himalayan Goral, has two subspecies and is a typical forest-dwelling mammal.Female and juvenile Himalayan Gorals cover an area of 40 hectares. Solitary males cover an area of 22-25 hectares. They rely on vision and hearing to perceive the surrounding environment. Acute...

Naemorhedus caudatus

Naemorhedus caudatus

Naemorhedus caudatus,Long-Tailed Goral,Naemorhedus caudatus caudatusMilne-Edwards,North China Mountain Antelope

Features:The protagonist of Flight of the Antelope

Long-Tailed Goral, no subspecies.Long-Tailed Gorals spend most of the year in small groups of 12 or less. Females, young gorals and sub-adult gorals form this group and move together, while older males usually live alone. They move in steep rocky areas and migrate up to 2 kilometers. In summer, the...

Naemorhedus baileyi

Naemorhedus baileyi

Naemorhedus baileyi,Red goral,Naemorhedus cranbrooki,Red goat, red goat, red sheep

Features:The scientific name was determined in 1961, making it one of the mammals with the latest name in the world.

Red Goral has two subspecies and is a typical forest-dwelling animal.Red Goral's broad hooves are suitable for climbing, and it can run and jump on cliffs as if walking on flat ground. They are more active in the morning and afternoon, usually in pairs or small groups, foraging for food and wate...

Saiga tatarica

Saiga tatarica

Saiga tatarica,Saiga,Saiga, long-nosed antelope

Features:The antelope with the largest nose in the world

The Saiga antelope has two subspecies. It is named "Saiga" because of its particularly large and bulging nose, which bends downward and has nostrils at the tip.Saiga antelopes are herd animals that migrate seasonally. Every autumn, they gather in large groups and migrate south to the warme...

Procapra picticaudata

Procapra picticaudata

Procapra picticaudata,Tibetan Gazelle, Goa,Gazelle Du Tibet,Gecela Del Tibet,Tibetische Gazelle,Tibetan gazelle, gazelle, Tibetan gazelle

Features:It is a species endemic to the Qinghai-Tibet Plateau and is known as the "Tibetan Yellow Sheep".

Tibetan Gazelle, also known as Tibetan Gazelle in English, has no subspecies and is a typical high mountain cold desert animal.For those who are familiar with the creatures in the Hoh Xil area, the easiest way to distinguish between Tibetan antelopes and Tibetan antelopes is to see which one has a &...

Procapra gutturosa

Procapra gutturosa

Procapra gutturosa,Mongolian Gazelle, Dzeren, Gazelle de la Mongolie,Gacela de Mongolia,Mongoleigazelle,Tsagaan dzeer,Mongolian gazelle, Mongolian gazelle, Mongolian gazelle

Features:Good at jumping and running fast, with a maximum speed of about 90 kilometers per hour

Mongolian Gazelle is called Mongolian Gazelle in foreign language. It has no subspecies.Mongolian Gazelle likes to live in groups. When migrating northward in spring, groups of 6,000 to 8,000 have been observed. In the summer pasture, males separate from the group. The group stays together for a lon...

Bos javanicus

Bos javanicus

Bos javanicus,Banteng,Bali cattle, white-rumped wild cattle

Features:It looks like a yellow cattle, and like the white-limbed bison, the hair below the knees is also white.

Javan buffalo is called Banteng in foreign language, and there are two subspecies.Javan buffalo usually live alone or 2-3 heads live together, and sometimes form a large group of 2-25 heads or more. Sometimes female cows, calves and sub-adults form a small group of more than 10 heads and move togeth...

Bos mutus

Bos mutus

Bos mutus, Pig sound cattle, Jiyake (Tibetan name transliterated as Yagui)

Features:It is a cattle species unique to the Qinghai-Tibet Plateau.

Wild yaks are called wild yak in foreign language. They are the wild counterparts of domestic yaks.Wild yaks live on the hillside all year round and like to eat soft bonza grass. They gnaw it with their teeth in summer and lick it with their tongues in winter. The thorny tongue of the bison is very...

Bos gaurus

Bos gaurus

Bos gaurus,White-limbed bison, wild yellow cattle, white socks, Asian bison, bison, big-headed cattle

Features:The largest bovine in the world, the real "Bull Demon King"

The Gaur is called Gaur in foreign language. There are two subspecies. The hair below the knees of the four limbs is white, so it is also called "white socks".Gaur is usually active at dawn and dusk. In summer, it is in the mountains with high altitudes, and in winter, it gradually descend...

Moose

Moose

Alces alces

Features:The largest and tallest deer in the world (Note: Giraffes do not belong to the deer family)

Moose, whose foreign name is Moose, has 8 subspecies and is the tallest deer in the world.The number of prongs in a moose's antlers is related to age. New horns are born between 6 and 8 months of age. The newly born horns are single branches, called cone horns. In the third year, 2 forks separat...

Elaphodus cephalophus

Elaphodus cephalophus

Elaphodus cephalophus,Green deer, black deer

Features:There is a horseshoe-shaped tuft of long black hair on the forehead

The Latin name of the tufted deer is Elaphodus cephalophus, which has three subspecies and is a small deer.Tufted deer live in hilly areas in mountainous areas, lush bamboo forests, mixed bamboo and broadleaf forests, and thatched slopes. They don't like humidity. After spring, they mostly stay...

Elaphurus davidianus

Elaphurus davidianus

Elaphurus davidianus,Père David's Deer, Pere David's Deer,Elaphurus davidiensis,Four-in-one, zhǔ (ancient name), Father David's deer

Features:A relatively docile species of deer

Milu [mí lù], also known as Pere David's Deer in foreign languages, is the only deer species in the Cervidae family and the genus Elk. This animal has a history of about two to three million years. Historically, there were five species of elk, namely the Bicha species, the Lantian species, the...

Przewalskium albirostris

Przewalskium albirostris

Przewalskium albirostris, White-lipped Deer, Thorold's Deer, Weißlippenhirsch,Przewalskium albirostris,Rock deer, white-nosed deer, yellow deer, Hama (Tibetan)

Features:A rare and special animal in China, it is regarded as a "sacred deer" in its place of origin.

White-lipped Deer is a species endemic to the Qinghai-Tibet Plateau, with no subspecies. It is the deer species with the highest altitude.White-lipped Deer like to move around in the open space and forest edge, and have very sensitive sense of smell and hearing. Because its hooves are wider than tho...

Rucervus eldii

Rucervus eldii

Rucervus eldii,Panolia eldii (M'Clelland,Brow-branched deer, brow-horned deer, marsh deer

Features:Similar in appearance to a sika deer

Eld's deer, whose Latin name is Cervus eldii, is a medium-sized deer with three subspecies. It is similar in appearance to sika deer, but smaller in size, with fewer spots, and a more slender neck, body and limbs, making it look particularly agile.Eld's deer like to live in groups, but males...

Bactrian Deer

Bactrian Deer

Bactrian Deer,Cervus elaphus yarkandensis,Cervus affinis yarkandensis,Cervus yarkandensis,Tarim subspecies of red deer, Tahe red deer, southern Xinjiang red deer, southern Xinjiang small white deer, Y

Features:It is a subspecies of red deer endemic to Xinjiang

Tarim Red Deer, also known as Bactrian Deer, is of medium size and short body. It is the only subspecies of red deer that lives in desert landscapes.Tarim red deer have unique adaptability to the desert area of the Tarim Basin, that is, they are particularly resistant to heat, drought, strong winds,...

Cervus elaphus wallichii

Cervus elaphus wallichii

Cervus elaphus wallichii,Cervus wallichi,Cervus elaphus affinis,Cervus canadensis wallichi ,Shou Cervus, Red deer Tibetan subspecies, Red deer Tibetan subspecies, Sikkim red deer

Features:It is a very special member of the red deer family and is a species endemic to the Tibet Autonomous Region.

The Tibetan red deer, Shou Cervus in English, is a species endemic to the Tibet Autonomous Region. It was first discovered in Sikkim, so it is also called Sikkim red deer. .Tibetan red deer have migratory habits. In winter and spring, they mainly move in alpine shrubs and alpine meadows at an altitu...