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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 Pangolins Proboscidea Monotremata
Tachyglossidae

Tachyglossidae

Spiny Anteater

Features:

Echidna (Tachyglossidae), one of four peculiar egg-laying mammals found in Australia, Tasmania and New Guinea. They eat and breathe through a bald tube-like beak extending from their dome-shaped body. Covered with spines. Echidnas have round eyes and slits for ears, two small nostrils (or nostrils) at the end of their beak, and a small mouth. Electroreceptors in the skin of the beak sense electrical signals produced by the muscles of invertebrate prey. Echidnas are active day and night....

platypus

platypus

Ornithorhynchus anatinus

Features:

The platypus (Ornithorhynchus anatinus) is a small Australian amphibian mammal known for its strange combination of primitive features and special adaptations, particularly its flat, almost comical beak, which early observers believed was sewn onto the mammal's body duck's beak. There is noticeable white fur under the eyes, adding to its unique appearance. The hair on the rest of the body is dark brown to light brown above and lighter underneath. Platypus in Australia...

Tupaia belangeri

Tupaia belangeri

Tree shrew,Sino-Burmese tree shrew,northern tree shrew

Features:Good at climbing, jumping, agile in action, timid and frightened, and have a strong sense of territory. Can produce 8 different sounds for alarm, attention, contact and defense.

The northern tree shrew (scientific name: Tupaia belangeri) is a tree shrew native to Indochina, the northeastern part of the South Asian subcontinent and southern China. Its type origin is near Yangon, Myanmar. It mainly inhabits tropical and subtropical forests and shrubs. The food is mainly insects, but also young birds, bird eggs, cereals, fruits, leaves, etc. Mainly distributed in Southeast Asia north of the Kra Isthmus. This species has a wide distribution range, large number, stable numbe...

Harpiola isodon

Harpiola isodon

Harpiola isodon

Features:The nostrils are lengthened into short tubes, and the dentition on the side of the head is almost equal in height.

Small bat, distributed domestically in Taiwan and abroad in Vietnam. It is a typical nocturnal forest bat, but its main habitat is not well defined, and a few individuals have been found living in caves. Emits a typical short-duration and wide-band echolocation sound wave, often hunting insects in f...

Murina shuipuensis

Murina shuipuensis

Murina shuipuensis

Features:The nostrils protrude into a short tubular shape with black hairs.

Shuifu tubnosed bat was described by Eger and Lim in 2011 based on a male specimen collected from Shuipu Village, Yuping Town, Libo County, Guizhou, China, at an altitude of 650m.Wang Xiaoyun et al. (2016) reported a new distribution of this species in Guangdong and Jiangxi based on some molecular m...

Murina recondita

Murina recondita

Murina recondita

Features:The nostrils are elongated into short tubes, and the dorsal hairs are golden yellow and mixed with metallic luster hair.

It is a relatively small bat distributed only in Taiwan. Typical nocturnal animal, whose main habitat is unknown, with sporadic use of burrows found. Emits typical short-duration and wide-band echolocation sound waves used to hunt insects in forest glades.Its body length is 34-44mm, its forearms 31-...

Murina puta

Murina puta

Murina puta

Features:The nostrils lengthen into short tubes.

Formosan tubenosed bats are found only in Taiwan. Found using banana dead leaves to roost. Emits typical short-duration and wide-band echolocation sound waves used to hunt insects in forest glades.It is a medium-small bat. Body length 40-53mm, forearm length 33-39mm, tail length 32-46mm. The head ha...

Murina jinchui

Murina jinchui

Murina jinchui

Features:The front end of the nostrils protrudes into a short tube, and the snout is black.

Jinchu tube-nosed bats are small in size and can be distinguished from Northeast tube-nosed bats, white-ventral tube-nosed bats and Fanjingshan tube-nosed bats, which are closely related in phylogenetic analysis. Although similar in size to this species, the first two species have brown-red back hai...

Murina gracilis

Murina gracilis

Murina gracilis

Features:The nostrils are lengthened into short tubes, and the dorsal hairs are covered with metallic hair.

This species is endemic to China. It is only distributed in Taiwan. It is a typical nocturnal arboreal bat, but its habitat is not well understood. It emits a typical short-duration and wide-band echolocation sound wave, which is used to hunt insects in forest glades.It is small, 33-45mm in length,...

Murina feae

Murina feae

Murina feae

Features:The anterior end of the nostrils protrudes into a short tubular shape, and the snout is dark grayish-brown.

Tube-nosed bats are small, with forearms about 29mm long. The front end of the nasal orifice protrudes into a short tubular shape, and the snout is dark grayish-brown. The ears are round and rounded, and the tip of the tragus is long, about half the length of the ear. The base of the dorsal hair is...

Murina fanjingshanensis

Murina fanjingshanensis

Murina fanjingshanensis

Features:The nose is a short tubular protrusion, open to both sides, its rear tubercle protrusion, the nose and the lower lip are hairy.

Fanjingshan Siphonophorus is similar to white-ventral and yellow-thorax siphonophorus, but there are some differences in body length, abdominal hair color, upper incisor and total cranial length. He et al. (2015). The body size of the samples collected from Hunan Province was small. The body length,...

Murina bicolor

Murina bicolor

Murina bicolor

Features:The head is brown, the snout is prominent, and the nostrils are lengthened into short tubes.

The yellow-thorax bat is a medium-sized bat, which is a typical nocturnal animal, and its main habitat is not very clear, which can be seen in the forest clearing to hunt insects. It has been found hibernating in high altitude tunnels during the winter. It emits typical short-duration and wide-band...

Murina aurata

Murina aurata

Murina aurata

Features:The nostrils are tubular, slender and long, and turn upward.

Golden tube-nosed bats are small, with forearms 28-32mm long. The nostrils are tubular, slender and long, and turn upward. The ear shell is wide oval, the posterior margin is not indented, the tragus is narrow, and the end is pointed. The back hairy base is gray black, the tip is golden; The ventral...

Plecotus taivanus

Plecotus taivanus

Plecotus taivanus

Features:The head is brown, the snout is prominent, and the nostrils are large.

Formosan long-eared bats are found only in Taiwan. It is a typical nocturnal animal and has been found to roost in tree holes. Emits a typical short sustained echolocation acoustic wave to detect the environment and prey, and can also listen to the prey to lock and hunt prey on the surface of the le...

Falsistrellus affinis

Falsistrellus affinis

Falsistrellus affinis

Features:The back of the body is brown, the surface is stained white.

Medium size. The ear shell is long and wide, with blunt and rounded ends. The tragus is short, with a concave notch at the base of the outer margin. The alar membrane terminates at the base of the phalanx. The hind feet are smaller. The back of the body is brown, the surface is stained white. The mo...

Thainycteris torquatus

Thainycteris torquatus

Thainycteris torquatus

Features:It is currently only distributed in Taiwan, China.

Yellow-necked bats are currently found only in Taiwan, China. Medium bats are 48-65mm long, 40-50mm long forearms, and 35-48mm long tails. The rostral end of the head is obvious. The base of the dorsal hair is black to dark brown, and the dopant tip has golden hair. A yellow or white band of hair fo...

Thainycteris aureocollaris

Thainycteris aureocollaris

Thainycteris aureocollaris

Features:There is a distinct ochre collar from the base of the ear to the throat.

Ringnecked bats are large, with forearms 47-52mm long; The hind foot is 9-12mm long, about half the length of the tibia. The dorsal hair is lighter than the ventral hair, the base is black, and the tip is ochre yellow, but the tip of the ventral hair is slightly white. There is a distinct ochre coll...

Pipistrellus javanicus abramus

Pipistrellus javanicus abramus

Pipistrellus javanicus abramus

Features:The ears are short and wide.

Pipistrella javanica is a small pipistrella. Hill & Harrison (1987) divided the Phyllopipistrella javanica into two effective species according to the obvious difference of penis bones: the phyllopipistrella javanica has a length of 5.0-5.5mm and its stalk is nearly straight; The penile bone of...

Myotis nipalensis

Myotis nipalensis

Myotis nipalensis

Features:There is a distinct notch at the base of the tragus

The Nepalese Myotis is relatively small, with a forearm length of 34-36.9mm. The inner edge of the ear shell is curved, and there are obvious nicks at 1/4 of the outer base, and there are raised leaves under the notch, almost at right angles to the notch. The tragus is long, lance-shaped, about half...

Submyotodon latirostris

Submyotodon latirostris

Submyotodon latirostris

Features:It is endemic to Taiwan, China

The habitat of the bat is not well known. Using narrow-band, constant-frequency echolocation sound waves to detect prey in the environment....

Myotis frater

Myotis frater

Myotis frater

Features:Tail length equals or slightly exceeds body length

Long-tailed Myotis bats are found in Fujian Province. Allen (1923) named the specimen from Fujian, and Ognev (1927) named the specimen from eastern Siberia <M. longicaudatus> according to the characteristics of tail length slightly exceeding body length. Ellerman &a...