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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.

Mammals.jpg


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
Didelphinae

Didelphinae

Opossum、possum、rat

Rodents LC

Features:‌Survival Strategy‌: Opossums use their unique "playing dead" strategy to escape predators. When feeling threatened, opossums will show a very realistic state of death, including respiratory arrest, decreased body temperature, body shaking, and discharge of foul-smelling fluid from anal glands, so that predators believe they are dead and avoid being eaten.
‌Reproductive Ability‌: Opossums have a very strong reproductive capacity. Female opossums can give birth to multiple pups per litter, up to 20. After birth, the pups live in the mother's pouch for a period of time, and then climb onto the mother's back until they can survive independently.
‌Food Range‌: Opossums are omnivorous animals, and their food includes plants, insects, small animals, etc. They can eat almost anything, including garbage and rotten fruits, which allows them to survive in a variety of environments.
‌Body Temperature and Health‌: Opossums have a low body temperature, which makes rabie

Opossum (scientific name Didelphinae, English name: Opossum) is a general term for mammals of the family Opossum in the order Possumidae. It is a small to medium-sized mammal. The mother opossum is named "opossum" because she can carry her young around with her. It has extraordinary reprod...

Chinchilla

Chinchilla

Chinchilladale,Chinchilla,South American Chinchilla, Woolly Mouse

Rodents EN

Features:‌Chinchillas‌, also known as chinchillas, are very popular pets. They have the following characteristics:
‌Appearance features‌: Chinchillas are very similar to rabbits and squirrels in appearance. They are small and fat, and females are usually slightly larger than males. They have a rabbit-like head and a squirrel-like tail. They have large, thin, blunt and round ears, large and bright eyes, and many whiskers of varying lengths on the sides of their noses. They have short forelimbs with 5 toes; strong hind limbs with 4 toes, and are good at jumping.
‌Coat color‌: The back and sides of chinchillas have gray-blue fur, and the abdomen gradually fades to white. After artificial breeding, their colors have many variations‌.
‌Life habits‌: Chinchillas are native to the Andes Mountains in South America and are accustomed to living in rock crevices and caves. Their average lifespan is about 10 to 20 years. Chinchillas are vegetarian animals and mainly eat special pellets and Timothy

Chinchilla, also known as chinchilla, chinchilla, chinchilla, woolly mouse, chinchilla, etc., is a common name for a small rodent of the genus Chinchilla (scientific name: Chinchilladale, foreign name chinchilla), belonging to the subfamily Chinchilla under the family Chinchilla. There are two speci...

kubanochoeres

kubanochoeres

kubanochoeres

Features:It has a rather large horn, similar to the horn of the legendary unicorn

kubanochoeres are a group of large, mound-toothed pigs that once lived in the Old World.Kuban pig is a kind of huge pig that lived in the Old world during the Middle Miocene geological period. Because it has some unique characteristics, it plays an important role in the systematic evolution of pigs....

wolverine

wolverine

Wolf's green

Features:Fiercely loyal to his master

Wolf green dog pedigree is more complex, mainly several breeds from the cross, tracing is very difficult, is a big project, both historical problems, and technical problems, Such as < a target = "_blank" href = "https://baike.baidu.com/item/DNA/98123?fromModule=lemma_inlink" &...

Taphozous melanopogon

Taphozous melanopogon

Taphozous melanopogon

Features:

The black-bearded tomb bat (Taphozous melanopogon), also known as the black-bearded sheath-tailed bat, is a member of the sheath-tailed bat family. The black-bearded tomb bat clusters in the cracks of the cave, or lies on the rock wall in the cave, hiding in the deep cracks by retreating. It can be...

Macroglossus sobrinus

Macroglossus sobrinus

Macroglossus sobrinus

Features:Very short tail, very narrow teeth

Andersen's long-tongued fruit bat (<M. sobrinus>) was named by Andersen (1911) based on the specimens of Gunong Igari, Malaysia. It was originally considered to be a subspecies of the small long-tongued fruit bat (<M. m. sobrinus>). However, Medway (1969) believed that Andersen's...

Eonycteris spelaea

Eonycteris spelaea

CHIROPTERA

Features:The tongue is very long, with a brush-like protrusion on the tip and a tricuspid papilla in the center of the tongue.

The tongue of the long-tongued fruit bat is very long, with a brush-like protrusion at the tip, a tridentate papillae in the center of the tongue, and a forearm length of 47.31-51.01 mm. It is similar to the long-tongued fruit bat (Eonycteris spelaea), but the second finger has a claw, the wing memb...

Cynictis penicillata

Cynictis penicillata

Cynictis penicillata ,Yellow mongoose, bush-tailed mongoose, yellow mongoose, red mongoose

Features:They have long claws and dig their own burrows or occupy the burrows of gray meerkats and ground rats.

Yellow mongoose (Cynictis penicillata, G. Cuvier, 1829) is a carnivorous animal of the genus Cynictis in the family Viverridae. There are 12 known subspecies.The pen-tailed mongoose lives in groups, some go out to hunt insects, while others take turns on duty. When standing, they support their bodie...

Ochotona pusilla

Ochotona pusilla

Ochotona pusilla

Features:The ear has a wide and very obvious white edge; below the white edge there is a very narrow band of black hair, and further down is yellowish-brown hair.

The steppe pika belongs to the subgenus <Pika>. This species has always been considered not to be distributed in my country. In September 2008, the Xinjiang Uygur Autonomous Region Locust and Rat Control Headquarters collected specimens for the first time in Karamay in northwestern Xinjiang; t...

Pseudo-Spirited Rat

Pseudo-Spirited Rat

Pseudo-Spirited Rat

Rodents LC

Features:

The species status of Pseudo-spiny rat is controversial, and it has long been considered a synonym of the needle-haired rat. The type locality of the needle-haired rat is Nepal, and the type locality of the Pseudo-spiny rat is Guadun, Fujian, and the two are far apart. Molecular phylogenetics confir...

Niviventer culturatus

Niviventer culturatus

Niviventer culturatus,White-tailed rat, sulfur-bellied rat, spiny gray rat, mountain rat, white-bellied rat

Rodents LC

Features:In summer, there are more spiny guard hairs and the back hair is darker brown; in winter, there are fewer spiny guard hairs and the back hair is slightly brownish yellow.

The species status of this species is highly controversial. It has long been a synonym of Niviventer confucianus. Only recently has molecular systematic research confirmed its independent species status. This species is mainly distributed in areas above 2000m above sea level in Taiwan. The habitat a...

Niviventer andersoni

Niviventer andersoni

Niviventer andersoni

Rodents LC

Features:It has a large body, a pointed snout, large ears, a pure white belly, and a clear boundary between the dorsal and ventral sides.

The species status of Andersen's white-bellied rat is stable, with three subspecies differentiation. In molecular systematics, it forms three obvious branches, but the boundaries of the branches are unclear and there is no one-to-one correspondence between the three subspecies.This species has b...

Cansumys canus

Cansumys canus

Cansumys canus,Cansumys

Rodents LC

Features:The tail hair is uniform gray in color, gray-black at the tip, and the hair at the tip forms a tuft.

The taxonomic status of Gansu hamster is controversial. Some scholars regard Gansu hamster as an independent genus and species, some scholars regard it as an independent species of the giant hamster genus (<Tscherskia>); some scholars regard it as a subspecies of the giant hamster (<Tschers...

Alexandromys kikuchii

Alexandromys kikuchii

Alexandromys kikuchii,Kikuchi Field Vole

Rodents LC

Features:It has the longest tail among the genus vole, and its hair base is dark slate blue (commonly known as "iron gray").

The taxonomic status of Taiwan vole is stable, but the genus-level taxonomic unit has been controversial. Many scientists put this species in the genus Vole, while some scientists have put it in the genus Vole (<Volemys>). Molecular systematic studies have confirmed that this taxonomic unit be...

Eothenomys fidelis

Eothenomys fidelis

Eothenomys fidelis,Southwestern woolly rat

Rodents LC

Features:

The Lijiang woolly mouse belongs to the genus Eothenomys. The species status is unstable and controversial. The type locality is Lijiang, Yunnan. Some scientists regard it as a synonym of the black-bellied woolly mouse (<Eothenomys melanogaster>), and some scientists regard it as a synonym of...

Eothenomys shimianensis

Eothenomys shimianensis

Eothenomys shimianensis

Rodents LC

Features:

Asbestos woolly rat is a new species published by Liu Shaoying et al. in 2018, and its type locality is located in Shimian County, Sichuan. In the phylogenetic tree constructed based on the mitochondrial genome, asbestos woolly rat and Kachin woolly rat constitute sister groups, and in the phylogene...

Eothenomys custos

Eothenomys custos

Eothenomys custos,

Rodents LC

Features:The tail is relatively short, most of which are less than half the body length.

The southwestern woolly rat belongs to the subgenus <Anteliomys> of the genus <Anteliomys>, and its species-level status is stable. There are currently 4 subspecies under the species, all distributed in Yunnan. The nominate subspecies <E. c. custos> (Thomas, 1912), the type localit...

Eospalax rufescens

Eospalax rufescens

Eospalax rufescens,Eospalax fontanierii,Eospalax cansus

Rodents LC

Features:The tips of the hairs are rust-colored, and some older individuals are bright rust-red.

The classification status of Qinling zokor at both genus and species levels is controversial. At the genus level, some scholars regard it as the subgenus Myospalax of the genus Myospalax, while some believe that the subgenus Myospalax is an independent genus. At the species level, many people regard...

Petaurista sybilla

Petaurista sybilla

Petaurista sybilla,Petaurista elegans

Rodents LC

Features:

The orange flying squirrel lives in subtropical evergreen broad-leaved forests or dark coniferous forests at medium and high altitudes. Its food mainly consists of fruits, seeds, and young branches and leaves of plants....

Petaurisa philippensis

Petaurisa philippensis

Petaurisa philippensis,Philippine flying squirrel, Giant flying squirrel

Rodents LC

Features:The fur is thick, with white and grayish-white tips densely covering the head and back, as if covered with a layer of frost.

Frost-backed flying squirrels live in tropical and subtropical areas, mostly choosing dense tall tree forests. They build nests in tree crowns or tree holes. Their food mainly consists of fruits, seeds, tender branches and leaves of plants, and they also eat insects.Listed in the "List of Terre...

Microtus juldaschi

Microtus juldaschi

Microtus juldaschi

Rodents LC

Features:

The Pamir pine vole (Pitymys juldaschi (Severtzov, 1879)) is an animal of the genus Pitymys of the family Cricetidae. The species is native to the shore of Karakul Lake in Kashgar, my country, and belongs to the subfamily Arvicolinae. The classification is quite confusing. It was previously included...