哺乳动物介绍【英文】
哺乳动物介绍 英文
Hello everyone! Today our group is going to give a presentation about mammals.As one of species evolves from late Jurassic period(侏罗纪晚期), mammalians’ brains are more developed and specialized than any other class of animals. Mammals are characterized by mammary glands(乳腺) that are modified for producing milk. All mammals have special sweat glands(汗腺) and hair.Here are five mammals we want to share with you:The first of are pandas. Panda is one of the most precious animals in the world. With white and black color, these animals are very fluffy and a little clumsy. Known as Chinese treasures, panda is a kind of animal that is endemic to China, they’re living in Sichuan province. Bamboo is their favorite food. Because of its cute appearance, panda is deep loved by the world public. 1961, WWF established its mark on the giant panda, the panda has become a symbol of the most important species conservation, also as a goodwill important representatives in the diplomatic activities in China.The second one is polar bear, the largest terrestrial carnivorous animal. The polar bear is a bear native largely within the Arctic Circle encompassing(围绕) the Arctic Ocean, its surrounding seas and surrounding land messes. It is the world’s largest land carnivore(食肉动物) and also the largest bear. It has thick fat and hair to stay warm, its white appearance on white snow is good protective coloration. It can move both on land and sea, thus it’s an advantage for a polar bear to catch food in such an extremely harsh climate. Nevertheless global warming has impact on the ice nowadays. The ice melts quickly in the two poles, which has a bad influence on polar bears. Their homes has been destroyed, the prey is also in reduction. We must take measures to protect these animals, for they’re in danger, they’re the treasure of nature.The third one is t he Roe Deer(狍子).The program of Dad, Where Are We Going has been very popular among many people, one of the period programs showed that these five pair fathers and children came to the northeast rural, and saw a cute animal——the roe deer, which make much more people aware of it. The roe deer is also called dwarf deer or wild sheep, which are herbivores(食草动物), feed on plants. The fur’s color of roe deer are usually straw yellow, there is white h aired in roe deer’s base of the tail, it looks really funny. In addition, the male roe deer have set of antlers(鹿角), but female roe deer don’t have, this is the way that how to recognize their sexes. The roe deer has very big and bright eyes, which makes it looks socuddly(可爱的). The roe deer almost live in open forest area, sometimes near the river valley. They rest in the forest during the day, take activities in the early morning or the late evening, because they are very timid and sensitive. they will run quickly if they finds you. As we know, there is one saying “Stupid Roe Deer” in the northeast area, it often be used to describe the people who is a little clumsy, and it’s gradually used to praise one person who is pretty and cute. But its own meaning is that the roe deer is so curious. When a hunter is chasing the roe deer, the roe deer will run very fast, but if the hunter stop to run after it, because of its curiosity, the roe deer will run back to the primary place to see what happened, the hunter do esn’t need or use great effort, then he can capture the roe deer very easily. How funny!The next one is Mongoose. Mongooses are primarily found in Africa, their range covering most of the continent. Some species occupy parts of southern Asia and the Iberian Peninsula. They are generally terrestrial mammals, but some are semi-aquatic, and others are at home inthe treetops. They normally have brown or gray fur, and a number of species sport striped(有条纹的) coats or ringed tails. Mongooses live in burrows(地洞) , feeding on small animals such as birds, frogs, insects, and worms. Some species supplement their diet with fruits, nuts, and seeds. Creative hunters, they are known to break open bird eggs by throwing them with their forepaws toward a solid object. Today effort has been done to control the number of this animal. As mongooses threaten the survival of various native species, particularly birds. However, in their natural environments, mongooses are currently threatened themselves due to habitat loss.The last one is sloth. Sloths are extremely slow-moving mammals found in the rainforest of Central and South America. There are two species of sloths: two-toed and three-toed. Most sloths are about the size of a small dog and they have short, flat heads. Their hair is grayish brown but, at times they look grey-green in color because they move so slowly that tiny algae grow all over their coats. Some sloths stay in the same tree for years. Their huge hooked claws and long arms allow them to spend most of their time hanging upside-down from trees. Since they have a slow metabolism(新陈代谢), they need very little food. They feed on fruit, leaves, buds, and young twigs(细枝). Sloths also sleep upside-down for up to 18 hours at a time. Mothers also give birth to babies upside-down. Babies cling to their mothers until they are able to take care of themselves. That’s all. Thank you!。
哺乳动物介绍 英文上课讲义
哺乳动物介绍英文Hello everyone! Today our group is going to give a presentation about mammals. As one of species evolves from late Jurassic period(侏罗纪晚期), mammalians’brains are more developed and specialized than any other class of animals. Mammals are characterized by mammary glands(乳腺) that are modified for producing milk. All mammals have special sweat glands(汗腺) and hair.Here are five mammals we want to share with you:The first of are pandas. Panda is one of the most precious animals in the world. With white and black color, these animals are very fluffy and a little clumsy. Known as Chinese treasures, panda is a kind of animal that is endemic to China, they’re living in Sichuan province. Bamboo is their favorite food. Because of its cute appearance, panda is deep loved by the world public. 1961, WWF established its mark on the giant panda, the panda has become a symbol of the most important species conservation, also as a goodwill important representatives in the diplomatic activities in China.The second one is polar bear, the largest terrestrial carnivorous animal. The polar bear is a bear native largely within the Arctic Circle encompassing(围绕) the Arctic Ocean, its surrounding seas and surrounding land messes. It is the world’s largest land carnivore(食肉动物) and also the largest bear. It has thick fat and hair to stay warm, its white appearance on white snow is good protective coloration. It can move both on land and sea, thus it’s an advantage for a polar bear to catch food in such an extremely harsh climate. Nevertheless global warming has impact on the ice nowadays. The ice melts quickly in the two poles, which has a bad influence on polar bears. Their homes has been destroyed, the prey is also in reduction. We must take measures to protect these animals, for they’re in danger, they’re the treasure of nature.The third one is t he Roe Deer(狍子).The program of Dad, Where Are We Going has been very popular among many people, one of the period programs showed that these five pair fathers and children came to the northeast rural, and saw a cute animal——the roe deer, which make much more people aware of it. The roe deer is also called dwarf deer or wild sheep, which are herbivores(食草动物), feed on plants. The fur’s color of roe deer are usually straw yellow,t here is white haired in roe deer’s base of the tail, it looks really funny. In addition, the male roe deer have set of antlers(鹿角), but female roe deer don’t have, this is the way that how to recognize their sexes. The roe deer has very big and bright eyes, which makes it looks socuddly(可爱的). The roe deer almost live in open forest area, sometimes near the river valley. They rest in the forest during the day, take activities in the early morning or the late evening, because they are very timid and sensitive. they will run quickly if they finds you. As we know, there is one saying “Stupid Roe Deer” in the northeast area, it often be used to describe the people who is a little clumsy, and it’s gradually used to praise one person who is pretty and cute. But its own meaning is that the roe deer is so curious. When a hunter is chasing the roe deer, theroe deer will run very fast, but if the hunter stop to run after it, because of its curiosity, the roe deer will run back to the primary place to see what happened, the hunter doesn’t need or use great effort, then he can capture the roe deer very easily. How funny!The next one is Mongoose. Mongooses are primarily found in Africa, their range covering most of the continent. Some species occupy parts of southern Asia and the Iberian Peninsula. They are generally terrestrial mammals, but some are semi-aquatic, and others are at home in the treetops. They normally have brown or gray fur, and a number of species sport striped(有条纹的) coats or ringed tails. Mongooses live inburrows(地洞) , feeding on small animals such as birds, frogs, insects, and worms. Some species supplement their diet with fruits, nuts, and seeds. Creative hunters, they are known to break open bird eggs by throwing them with their forepaws toward a solid object. Today effort has been done to control the number of this animal. As mongooses threaten the survival of various native species, particularly birds. However, in their natural environments, mongooses are currently threatened themselves due to habitat loss.The last one is sloth. Sloths are extremely slow-moving mammals found in the rainforest of Central and South America. There are two species of sloths: two-toed and three-toed. Most sloths are about the size of a small dog and they have short, flat heads. Their hair is grayish brown but, at times they look grey-green in color because they move so slowly that tiny algae grow all over their coats. Some sloths stay in the same tree for years. Their huge hooked claws and long arms allow them to spend most of their time hanging upside-down from trees. Since they have a slow metabolism(新陈代谢), they need very little food. They feed on fruit, leaves, buds, and youngtwigs(细枝). Sloths also sleep upside-down for up to 18 hours at a time. Mothers also give birth to babies upside-down. Babies cling to their mothers until they are able to take care of themselves.That’s all. Thank you!。
北极熊,英文介绍小作文
北极熊,英文介绍小作文英文回答：The polar bear, also known as the Ursus maritimus, is a large marine mammal native to the Arctic region. It is the largest species of bear and is well-adapted to the harshand icy environment of the Arctic. Polar bears have a thick layer of blubber and a dense fur coat that help themsurvive in the freezing temperatures.Polar bears are excellent swimmers and can swim forlong distances in search of food. They primarily feed on seals, which they catch by waiting near breathing holes in the ice or by ambushing them when they come up for air. Polar bears have a strong sense of smell, which helps them locate seals from a distance.These magnificent creatures have a unique hunting style. They are known to patiently wait at the edge of the ice, sometimes for hours, for a seal to appear. Once a seal isspotted, the polar bear uses its powerful front limbs to strike the seal and drag it out of the water. They can also catch seals by diving into the water from the ice.Polar bears are solitary animals and are highly territorial. They have a large home range, which can extend over hundreds of square miles. Male polar bears are knownto have a larger home range than females and often comeinto conflict with each other during the breeding season.Climate change poses a significant threat to the polar bear population. As the Arctic ice melts, polar bears lose their hunting grounds and are forced to swim longer distances in search of food. This can lead to exhaustionand starvation. Additionally, the melting ice reduces the availability of seals, which are the primary food sourcefor polar bears.中文回答：北极熊，也被称为海熊，是一种生活在北极地区的大型海洋哺乳动物。
介绍猪是哺乳动物作文英文
介绍猪是哺乳动物作文英文英文：Pigs are mammals that belong to the family Suidae and the genus Sus. They are domesticated animals that are commonly raised for meat, as well as for their skin and other by-products. Pigs are known for their intelligence and social behavior, and they are often kept in groups or herds on farms.Pigs have a reputation for being messy and dirty animals, but in reality, they are quite clean. They designate specific areas for sleeping, eating, and defecating, and they will not soil their living space if given the opportunity to keep it clean. In fact, pigs are often compared to humans in terms of their cleanliness and intelligence.In terms of their physical characteristics, pigs are known for their stout bodies, short legs, and snouts. Theyhave a keen sense of smell and are able to use their snouts to root around in the ground for food. Pigs are omnivores, which means they eat both plants and animals. They have a varied diet that includes grains, fruits, vegetables, and even small animals if given the opportunity.Pigs are also known for their reproductive capabilities, as they are able to produce large litters of piglets. A sow, or female pig, can have up to 12 piglets in a single litter, and they are known for being attentive and protective mothers.Overall, pigs are fascinating animals that play an important role in agriculture and food production. They are intelligent, social, and adaptable creatures that have been domesticated for thousands of years.中文：猪是哺乳动物，属于猪科和猪属。
哺乳动物英语词汇
哺乳动物英语词汇English:Mammals are a diverse group of animals characterized by several unique features. One key characteristic is the presence of mammary glands, which produce milk to nourish their young. Mammals are also distinguished by having hair or fur covering their bodies, which helps with insulation and protection. Another defining trait is the presence of a neocortex in the brain, which is responsible for higher cognitive functions such as problem-solving and social interaction. Mammals give birth to live young rather than laying eggs, and they typically exhibit parental care towards their offspring. This care can range from nursing and grooming to teaching essential life skills. Mammals inhabit various ecosystems worldwide, from the depths of the ocean to the highest mountains and everything in between. They have adapted to a wide range of diets, including herbivory, carnivory, and omnivory, making them incredibly versatile in their feeding habits. Mammals play vital roles in ecosystems as pollinators, seed dispersers, predators, and prey, contributing to the overall balance and functioning of their respective habitats. From the mighty blue whale to the tiny Etruscan shrew, mammals encompass anastonishing array of sizes, shapes, and behaviors, making them one of the most fascinating groups of animals on Earth.中文翻译:哺乳动物是一类具有多种独特特征的动物群体。
介绍猪是哺乳动物作文英语
介绍猪是哺乳动物作文英语Pigs are one of the most common and widespread domesticated animals in the world. They are classified as mammals, which means they are warm-blooded, have hair or fur, and give birth to live young. Pigs are also known as swine, hogs, or boars, depending on their species and gender.Pigs are found all over the world, from farms and ranches to the wild. They are highly adaptable and can thrive in a variety of environments, from forests and grasslands to deserts and wetlands. Pigs are omnivores, which means they eat both plants and animals. Their diet includes grass, roots, fruits, insects, and small animals like rodents and snakes. Pigs are also known for their love of mud, which helps them stay cool and protects their skin from the sun.Domesticated pigs are often raised for their meat, which is called pork. Pork is a popular food in manycultures and is used in a variety of dishes, from bacon and ham to sausages and barbecue. Pigs are also used for their fat, which is used to make lard, and their skin, which is used to make leather.Pigs are social animals and live in groups called sounders. Sounders are usually made up of females and their offspring, while males live separately in bachelor groups. Pigs communicate with each other through a variety of sounds, including grunts, squeals, and snorts. They arealso intelligent animals and have been trained to perform tricks and tasks, such as herding and sniffing out truffles.In conclusion, pigs are fascinating animals that have played an important role in human society for thousands of years. Whether as a source of food, leather, or companionship, pigs have proven to be versatile andvaluable creatures. As we continue to learn more aboutthese amazing animals, we can appreciate their unique qualities and contributions to our world.。
英语图文并茂介绍一种动物作文
英语图文并茂介绍一种动物作文英文回答：Elephants are the largest land-based mammals on Earth. They are herbivores that are native to Africa and Asia. Elephants are known for their long trunks, large ears, and thick skin. They are also very intelligent and social animals.There are two different species of elephants: the African elephant and the Asian elephant. African elephants are larger than Asian elephants, and they have larger ears. Asian elephants have smaller ears and a more rounded back.Elephants live in herds of up to 100 individuals. The herd is led by a matriarch, who is typically the oldest and largest female. Elephants are very social animals and they communicate with each other using a variety ofvocalizations and body language.Elephants are herbivores and they eat a variety of plants, including leaves, fruits, and roots. They are also known to eat bark and dirt. Elephants need to consume a lot of food each day, and they can spend up to 16 hours a day foraging for food.Elephants are pregnant for 22 months, which is the longest gestation period of any mammal. Calves are born blind and they weigh about 200 pounds. Calves stay with their mothers for several years, and they learn how to survive in the wild.Elephants are an important part of the ecosystem. They help to clear forests and they create watering holes that are used by other animals. Elephants are also a popular tourist attraction, and they are often featured in zoos and circuses.However, elephants are facing a number of threats, including habitat loss, poaching, and climate change. Habitat loss is the biggest threat to elephants, as it reduces the amount of food and water that is available tothem. Poaching is also a major problem, as elephants are killed for their ivory tusks. Climate change is also athreat to elephants, as it is causing changes in their habitat and food supply.Conservationists are working to protect elephants and their habitats. They are working to educate people aboutthe importance of elephants, and they are also working to reduce habitat loss and poaching.中文回答：大象是地球上最大的陆地哺乳动物。
英语哺乳动物科普作文
英语哺乳动物科普作文Title: Exploring the Fascinating World of Mammals。
Introduction:Mammals, a diverse class of animals, encompass a wide range of species, from the majestic elephant to the tiny shrew. In this essay, we will embark on a journey to explore the intriguing world of mammals, delving into their characteristics, habitats, and significance in the natural world.Characteristics of Mammals:Mammals are characterized by several unique features that distinguish them from other classes of animals. Firstly, all mammals possess mammary glands, which produce milk to nourish their young. This trait gives the class its name, "Mammalia." Additionally, mammals are endothermic, meaning they regulate their body temperature internally.This ability enables them to inhabit diverse environments ranging from polar regions to tropical rainforests.Another distinguishing feature of mammals is their hair or fur, which varies greatly in texture, color, and density among different species. Hair serves various functions, including insulation, camouflage, and sensory perception. Furthermore, mammals have specialized teeth adapted totheir dietary preferences, whether they are herbivores, carnivores, or omnivores.Habitats and Diversity:Mammals inhabit virtually every corner of the Earth, from the depths of oceans to the highest mountain peaks. They occupy diverse ecosystems, including forests, grasslands, deserts, and urban areas. This adaptability has contributed to the extraordinary diversity of mammalian species, which number over 6,000.Among the most iconic mammalian habitats are the African savannas, home to elephants, lions, and giraffes.In the Amazon rainforest, an unparalleled wealth of mammalian biodiversity thrives, including jaguars, sloths, and monkeys. From the Arctic tundra to the Australian outback, mammals have successfully colonized a vast array of environments through evolutionary adaptations.Significance in the Natural World:Mammals play crucial roles in ecosystem dynamics and are integral to the balance of natural communities. As herbivores, they influence plant populations through grazing and seed dispersal, shaping the structure of terrestrial landscapes. Predatory mammals help regulate prey populations, preventing overgrazing and promoting biodiversity.Moreover, mammals contribute to nutrient cycling and soil fertility through their activities, such as burrowing and waste deposition. In aquatic ecosystems, marine mammals like whales and dolphins play vital roles in nutrient transport and plankton regulation. Additionally, mammals serve as indicators of environmental health, reflectingchanges in habitat quality and ecosystem stability.Conservation Challenges:Despite their ecological importance, many mammalian species face numerous threats to their survival, primarily due to human activities. Habitat destruction, caused by deforestation, urbanization, and agricultural expansion, poses a significant threat to countless mammal populations worldwide. Climate change exacerbates these pressures, altering habitat suitability and disrupting ecological relationships.Furthermore, illegal wildlife trade, poaching, and hunting endanger numerous mammalian species, driving them towards extinction. Conservation efforts are essential to safeguarding vulnerable mammals and preserving biodiversity for future generations. Conservation initiatives include habitat restoration, protected area establishment, and community-based conservation projects aimed at promoting coexistence between humans and wildlife.Conclusion:In conclusion, mammals represent a remarkable and diverse group of animals that inhabit various ecosystems worldwide. Their unique characteristics, habitats, and ecological roles highlight their significance in the natural world. However, conservation challenges threaten many mammalian species, underscoring the urgency of concerted efforts to protect and preserve these extraordinary creatures for the benefit of ecosystems and humanity as a whole.。
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Order Tubulidentata
Order Pholidota
Order Xenartha
Hyrax
Order Hyracoidea
Mammalian Integument & Glands
• • • • Sebaceous Sweat Scent Mammary
Mammary Glands
Fur
• Pelage
– Underhair – Guard hairs
• 1 or 2 molts/yr
Horns
Antlers
Mammal Skull
Formation of a Hard Palate
Skull Diversification
Dentition
• 2 sets
– Milk teeth (deciduous) – Permanent teeth
• Rodents & lagomorphs
– Teeth continuously grow
Carnivore Digestive Tracts
Herbivore Digestive Tracts
ቤተ መጻሕፍቲ ባይዱ
Migratory Land Mammals
Migratory Sea Mammals
Sonar
Marsupial Reproductive Cycles
Gestational & Lactational Differences between Marsupials & Mammals
Gestation Periods • Large mammals (herbivores)
– Longer gestations – Precocial newborns
• Class Mammalia
– Subclass Theria
• Infraclass Eutheria
– – – – – – – – – – – Order Rodentia Order Chiroptera Order Insectavora Order Carnivora Order Primates Order Artiodactyla Order Lagomorpha Order Cetacea Order Perissodactyla Order Sirenia Order Proboscidea
Mammalian Reproduction Modes
• Prototherians (monotremes)
– Oviparous – Hatchlings mature in pouch and suckle from mammary gland
• Metatherians (marsupials)
• Multiple ovulation periods per year
• Menstrual cycle
– Estrus followed by menstruation – Shedding of uterine lining – Only in humans, apes, & old world monkeys
– Vivparous – Very immature young mature in pouch and suckle from mammary gland
• Eutherian (placentals)
– Vivaparous – Precocial & altricial young – Suckle young
Class Mammalia
Mammal Taxonomy
• Class Mammalia
– Subclass Prototheria
– Order Monotremata spiny echidna Tachyglossus aculeatus
duckbilled platypus Ornithorhynchus anitinus long beaked echidna Zaglosssus bruijni
Mammal Taxonomy
• Class Mammalia
– Subclass Theria
• Infraclass Metatheria
– Order Marsupialia Koala
Possum
Didelphis virginiana
Kangaroo
Tazmanian Devil
Mammal Taxonomy
• Small insectivores, rodents, carnivores
– Shorter gestations – Altricial newborns
• Sightless • Hairless
Domestication
Prosimian Primates
Hominidae
Human Taxonomy
Kingdom Animalia Phylum Chordata Subphylum Vertebrata Class Mammalia Order Primates Family Hominidae Genus Homo Species sapiens
Human Ancesteral Lineages
Reproductive Cycles • Estrous cycle
– Time of ovulation following a peak in estrogen production (estrus) – Monestrous
• 1 ovulation period per year
– Polyestrous