动物英语作文5句(优秀20篇)

目前，濒危的动物正在日益剧增。如何保护濒危动物成了我们的当务之急。人们疯狂的捕杀动物，为了它们的肉、皮毛。我们这样做是不对的，因为动物是我们的朋友，我们应该保护它们，而不是将它们赶尽杀绝。大熊猫就是濒危动物的代表，它生活在森林里，以竹子为食，它们仅仅依靠着自然保护区生存。我们应该停止对动物们的捕杀，更好地保护它们

There are more and more endangered animals at present,so how to protect them has been our task of top priority . Its wrong for people to hunt animals for their meat and feather,for they are our good friends.We should protect them instead of killing them.Giant pandas,which are one of the endangered animals,live in the forests and live on bamboo lealves.They can just live safely in the natural protection zones.We should stop killing animal and protect them.

You know, theres a lovely puppy in the aunts house. It has white hair all over the body, white as cotton candy; its eyes are black and white, like two precious stones; ears are semicircle, nose is black, tail is short. Its really beautiful!

One day, I went to the aunts home to play. As soon as I entered the door, I saw the dog barking in the doorway, as if welcoming me to his house. I saw it, smiled and said: "small naughty, do not worry, I will play with you immediately!"."

As I entered the room, I sat down on the sofa and wanted to rest for a while. But it licks me with its tongue. I cant stand this kind of "affectionate" reception, so I have to go out with him.

Outside, we played hide and seek. I hid in the middle of the back of the car, waiting for it to come to me. After a while, I saw him running nimbly towards this place. Suddenly, it came to me with a slam on the brakes, but it didnt realize my existence. So I decided to come and see what it was like.

It was the body of the hair, like a bath. It spat out its tongue against the sun. Yes, the weather is so hot today, just like the fire on the ground. But it also found me at this time. Ah! It become more lovely! Light shining white hair, looks very smooth. Its eyes were fixed on me, a smile on my face, as if to say, "look, boy, Ive found it."".

I really like this cute puppy!

As we all know , animals are mans friends.Nowadays with the development of industry ,a lot of animals are in danger of extinction. We should protect animals so that we can live in a better environment .To protect them ,our government should forbid people to kill them , and for most of us ,we can plant more trees and call for protecting anmimals habitats.Only if we protect animals well can we have a bright future!

From the passage we know that thousands of endangered animals are facing the threat of being bought and sold on the internet. Traders make a great profit from it，which is illegal.

As is often read in the newspaper reports， wild life especially the rare species are threatened with extinction. Human beings are making attempts to hunt wild animals for a big profit， which， of course， results in a sharp decrease in the number of animals.

Therefore， it is high time for us to take quick action to protect them. First of all， it’s quite necessary for every citizen to realize the importance of animal protection. Only by knowing its importance can people develop a sense of responsibility. In addition， the government should pass some laws to forbid any hunting of rare animals.

If I were one of the endangered animals， I would hope that man could be a good friend of mine rather than my enemy.

从文中我们知道成千上万的濒危动物面临的威胁是在网上买卖。交易员有很大的利润,这是非法的。

经常在报纸上看到报道,野生动物尤其是稀有物种濒临灭绝。人类正在试图猎杀野生动物,也赚了不少钱,,当然,导致动物的数量急剧减少。

因此,是时候为我们迅速采取行动来保护他们。首先,它是非常必要的对于每一个公民意识到保护动物的重要性。只有通过了解它的重要性人们可以开发一种责任感。此外,政府应该通过一些法律来禁止任何捕猎珍稀动物。

如果我是濒危动物之一,我希望那个人可能是我的一个好朋友而不是我的敌人。

What kind of animals do you like in our common homeland - earth, how many animals do you like? Anyway, my favorite animal is our most loyal friend - dog.

My favorite dog is my neighbors home that is a Beijing dog and rounds and Coli sheep shepherd handsome. They play together every day, is a pair of good friends, I also like them, they saw me and wagged my tail came to me.

Handsome body Biao big, the body about sixty centimeters long. Two legs standing, fully able to my shoulder, his eyes, nose, mouth, ears are more than round, and most like to see him running when the figure - curly flying, like a horse. I often and round, handsome with the running, each time is handsome first, round second, my third It is no exaggeration to say that the speed of handsome hands run no less than the speed of purebred horses. The general dog ran up, will be issued a "blah" sound, handsome handsome hands up very small, not careful is not heard. Handsome handsome look is also handsome: curly flying, the body was arcuate. If you want to use a word to describe handsome, that is: handsome. If you use a word, that is: impeccable.

Relative to the handsome hands, round the size of a lot of small, only about thirty centimeters long, less than half the handsome handsome. The meaning of his name comes from his pair of eyes, it is too round. Like a shiny black gem. And his legs are round, round the name is so come. And his legs are very short, so even if he sprinkled his feet running, but also run fast, but I still like his kind of simple cute.

This is my favorite animal, you like it?

Here is a small zoo. I like the tiger，although they are very ugly，but very imposing. Also has the national treasure panda，they are a little shy，does not dare to look at us. Who are those? they are elephants，you look at they to be huge，also has a point to be interesting. I do not like the lion，they compare the tiger clown，is also unimposing.

This is the small zoo.

3.Recently, three owls appeared suddenly on our campus. They made me think of my pet from childhood. When I was little, we had an owl at home. It was small, gray, and had two big eyes. We liked it very much. Every time I went home, it greeted me by making “goo-goo” sounds. We always played with it and talked to it. It would blink its eyes just like it understood what we were saying. It was like my best friend. But when the weather became colder, we forgot to keep it warm, and it died. It made us sad for a long time, and it also taught me how important it is to take care of animals.

We need to protect wild animals, because we protect wild animals, wild animals will be very friendly to us.

Like the swallow, swallow can help us to eat the pests in the field. If we human beings killed to catch them, they will eat mosquitoes that often to scratch faze us, let us better life? Without the swallow around us become many insect pests, these pests have great harm to our human!

I have an example. For example the frog, the frog can also help us to eat the pests in the field, can be said to be the police in the field. Once we kill them, not the frog, the pests in the field more and more, pest constantly eat vegetables, dont we will have a good harvest?

I have an example. Such as w, w is a doctor in the forest, it can help us to eat the pests in the tree, the tree back to health. We killed them, pests will be more and more trees, trees will slowly decrease. No trees on earth, floods, earthquakes.

My last an example. Such as owls, catch rats, the owl is good for us human beings, human is often hunt them. No owls, voles will increase. Rats ate the crops and vegetables is more, we human beings did not have a good harvest.

So, we need to protect more than animals. At the same time, we also need to protect other wild animals!

我们要保护野生动物，因为我们保护野生动物，野生动物对我们人类也会很友好。

比如说燕子，燕子能帮我们把田里的害虫吃掉。如果我们人类杀害捕捉它们，它们会吃掉那些常常来搔扰我们的蚊子，让我们更好地生活吗?没有了燕子，我们的周围变得很多害虫，这些害虫对我们人类有很大的坏处呀!

我还举个例子。比如说青蛙，青蛙也能帮我们吃田里的害虫，可以说是田里的警察。我们支捕杀他们，一旦没有了青蛙，田里的害虫越来越多，害虫不断地吃菜，难道我们会有美好的丰收吗?

我还举个例子。比如说啄木鸟，啄木鸟是森林中的医生，它可以帮我们吃掉树里的害虫，让树恢复健康。我们杀害它们，树木的害虫会越来越多，树木会慢慢地减少。地球上没有树，会发洪水、地震。

我最后举个例子。比如说猫头鹰，猫头鹰捉田鼠，是对我们人类有好处的，人类却常常捕猎它们。没有猫头鹰，田鼠会增加。田鼠吃的庄稼和菜就更多了，我们人类一样没有好的收成。

所以，我们要保护以上的动物。同时，我们还要保护其他的野生动物!

Few Americans study stay put for a lifetime. They move from town to city or to suburb, from high school to college in a different state, from a job in one region to a better job elsewhere, from the home where they raise their children to the home where they plan to live after retirement. With each move they are forever making new friends, who become part of their new life at that time.

很少有美国人学习留一辈子。他们从城市搬到城市或郊区，从高中到大学在不同的国家，从一个地区到一个更好的工作在其他地方，从他们的家中，他们的孩子在家里，他们计划在退休后生活。随着每一个移动，他们永远在新的朋友，谁成为他们的新生活的一部分，在那个时候。

My home have a lovely and naughty little white dog, its name is small white.

The small white to sleep. A noon, it will find a warm place, carefree played a big sleep, no matter what you call it, call it, its like not to hear, in the left ear, right ear out, dont ignore you.

Once in it when sleeping, I secretly hid the its food, it woke up, cant find my dinner, it is like a cat on hot bricks, like boiled dumplings, worried, "wang wang" barked, seems to shout "things I? Im not hungry!"

Suddenly, it triumphantly walked to come over to see me, like Sherlock Holmes, seemed to have answers, eyeing up and looked at me and after a while, quickly ran up and grabbed my trousers, tried to pull back, I also dont be afraid, go forward hard, alas, because of the small white teeth are sharp, so I was it to pull over.

Small white repeatedly "begged" me, his eyes reveal anxiously look, Im helpless, gave it the food into the cupboard.

Small white immediately as found the family dog, mingled, as if in said "thank you, master!"

How, this is the interesting thing between I with small white!

我家有一只既可爱又淘气的小白狗，它叫小白。

小白贪睡极了。一到中午，它就会找个暖和的地方，无忧无虑地睡起了大觉，不管你怎么叫它，喊它，它都像没听见似的，左耳朵进，右耳朵出，一点也不理睬你。

有一次，在它睡觉时，我偷偷地把它的食物藏了起来，它醒时，找不到了美餐，简直是像热锅上的蚂蚁，又像沸腾了的饺子，心急如焚，“汪汪”地叫个不停，似乎是在喊“我的事物呢?我饿得不行了!”

忽然，它看见我得意洋洋地走了过来，像福尔摩斯一样，似乎有了答案，便虎视眈眈地看着我，过了一会儿，迅速地跑过来，咬住了我的裤子，拼命地往后拽，我也不干示弱，使劲地往前走，唉，由于小白的牙齿锋利，所以我被它拉了过去。

小白再三“恳求”我，眼睛里露出了焦急地神情，我无可奈何，把藏在柜子里的食物给了它。

小白顿时像找到了家的小狗一般，悲喜交集，好象在说“谢谢你，好主人!”

怎么样，这就是我和小白之间有趣的事!

As we all know,animals are our friends.I like every animal.But I like dogs best.Dogs are not only very lovely,but also very helpful.Thats why we all feed dogs at home.I often share happiness and shorrow with it, which belongs to me three years ago,called"Betty".In other words,we should treat them as our real friends.Do you agree with me?

我们都知道,动物是我们的朋友。我喜欢所有的动物。但我最喜欢狗。狗不仅是很可爱,但也很有帮助。这就是为什么我们都喂狗在家里。我经常和它分享快乐,我三年前称它为“贝蒂”。换句话说,我们应该善待我们的真正的朋友。你同意我吗?

My favourite animal 范文一

Dolphin is my favourite animal.

It is one of the most precious animals. Their bodies are very long, about one zhang（丈）. Dolphins live in the sea. They live on fish, shrimps and so on.

Dolphins are very friendly and peaceful. They never attack people. Instead, they have saved many people in danger in the past years. How helpful the dolphins are!

Dolphins are very clever. People often train them so that they can give a dolphin show which brings people a lot of happiness and joy.

Unluckily, the number of dolphins is getting smaller and smaller. Because of water pollution, there is less and less space for dolphins. Many people make money by hunting dolphins. If we don’t protect them, maybe we’ll lose our good friends one day. As a student, I hope more and more people should take actions to protect dolphins.

My favourite animal 范文二

My favourite animal is tortoise. Tortoise walk not fast. But I like the tortoise. Why? Because, tortoise is a cute animal. It have a short tail and a four short foot. It have a little head and a hard shell. They are forty-five little and cute tortoise in My home. They like to play in the water. When they afraid some thing. They wall run fast. They like to eat the fish. I often buy some small fish to them to eat. They can catch the fish fast. First, they fake(假) sleep. When the fish swim near they mouth. They catch the fish fast and bit the fish head. So, the fish die. They can eat the fish. In winter. They like to sleep in the sand. When they sleep, they don’t eat any food.Because they wall hibernation. But, when they are thirsty. They come out of the sand. So, we must give water to them to drink.

I love the tortoise. I hate the eagle. Because, the eagle often eat the tortoise with it sharp mouth.My favourite animal is tortoise.

My Favourite Animal 范文三

My favourite animal is a dog.I had a dog when I was ten years old.Its name is Lily.Its a brown and white dog.It does everything with me.Everyday I give it some water to drink and some food to eat.At the weekend,Ill make it take a bath.At that time,the dog is very gentle.And I like it very much.This is my favorite animal----a beautiful,gentle and lovely dog.

nimals are natural resources that people have wasted all through our history. Animals have been killed for their fur and feathers, for food, for sport, and simply because they were in the way. Thousands of kinds of animals have disappeared from the earth forever. Hundreds more are on the danger list today. About 170 kinds in the United States alone are considered in danger.

Why should people care? Because we need animals, and because once they are gone, there will never be any more. Animals are more than just beautiful or interesting. They are more than just a source of food. Every animal has its place in the balance of nature. Destroying one kind of animal can create many problems. For example, when farmers killed large numbers of hawks, the farmers stores of corn and grain were destroyed by rats and mice. Why? Because hawks eat rats and mice, with no hawks to keep down their numbers, the rats and mice multiplied quickly.

Luckily, some people are working to help save the animals. Some groups raise money to let people know about the problem. And they try to get the governments to pass laws protecting animals in danger. Quite a few countries have passed laws. These laws forbid the killing of any animal or planton the danger list. Slowly, the number of some animals in danger is growing.

动物是自然资源，在整个历史过程中，人类一直在糟蹋着这种资源。人们杀死动物，获得它们的皮毛，把它们当作食物或运动方式，或者只是因为它们碍事。成千上万种动物已经从这个地球上永远地消失了。现在另外上百种动物也上了濒危动物名单。仅荚国大概就有170种被认为处于危险当中。

为什么人们应该感到担忧呢?因为我们需要动物，因为它们一旦消失，就永远不会再出现。动物不仅仅是漂亮或有趣。它们不仅仅是人类的食物来源。在维持自然平衡中，每种动物都有其作用。毁灭某种动物会导致许多问题。比如，农民们如果杀死为数众多的鹰，他们谷物和粮食的仓库就会受到老鼠和田鼠的破坏。 为什么?因为鹰吃鼠类，没有鹰控制它们的数量，鼠类就会迅速繁殖。

幸运的是，有些人正在努力帮助拯救这些动物。有些组织筹钱以便人们了解这一问题。他们也努力使政府通过保护濒危动物的法律。很多国家已经通过了法律。这些法

律禁止杀害濒危名单上的动植物。某些濒危动物的数目正在慢慢地不断上升。

导语：很多东西都面临灭绝的危险，我们应该保护动物，下面是yuwenmi小编为大家整理的优秀英语作文，欢迎阅读与借鉴，谢谢!

Many wild animals are facing the danger of extinction, because the environment that they are living in has changed greatly. For example, with the developmet of cities, the using of insecticide and serious pollution, their living areas have become narrowcr and narrower. Many of the wild animals, now are confronted with food crisis. At the same time, man is killing off species just for getting their fur, skin, horns, teeth and meat.

In order to protect our resources of ecology, people should realize that the loss of any species is at least the loss of source of knowledge and a source of natural beauty. There fore, measures of the following should be taken: pollution standards are made to keepdown poisons; killing off certain rare species is prohibited; national parks should be set up as wild life, reserves.

Only if we human beings take some drastic measures can wild animals be preserved.

【参考译文】

许多野生动物正面临灭绝的危险，因为它们生活的环境已经发生了巨大的变化。例如，随着城市的发展，杀虫剂的使用和严重的污染，他们的生活区域变得越来越狭小。许多野生动物现在面临食物危机。同时，人类为了获取皮毛、皮肤、角、牙和肉而捕杀物种。

为了保护我们的生态资源，人们应该意识到任何物种的损失至少是知识的源泉和自然美的源泉。因此，本应采取以下措施：制订污染标准以降低有毒物质;严禁杀害某些稀有物种;应建立国家公园作为野生动物，保护区。

只有人类采取一些激烈的措施，野生动物才能被保存下来。

Animals are our friends. Although some of them are very dangerous. But I think we should help them. Animals are important for every people. No one can live without animals. So, we should do someting for them. We cant kill them too many, we should keep the balanced nature. Dont damage any animals. And if you have a pet, than, please feed it well. Animals are friendly to us, if we are friendly to them. Animals will be our friends forever.

导语：动物是人类的朋友，可是每天都有着很多的动物被人类消灭，但是这依然动摇不了我们保护小动物的决心，下面和小编一起来看看动物英语作文：熊猫。希望对大家有所帮助。

The giant panda （Ailuropoda melanoleuca） （"black-and-white cat-foot"） is a mammal classified in the bear family, Ursidae, native to central-western and southwestern China. It is easily recognized by its large, distinctive black patches around the eyes, ears and on its rotund body. Though technically a carnivore, the panda has a diet which is 98% bamboo. However, they may eat other foods such as honey, eggs, fish, and yams.

The Giant Panda is an endangered animal; an estimated 3,000 pandas live in the wildand over 180 were reported to live in captivity by August 2006 in mainland China（another source by the end of 2006 put the figure for China at 221）， with twenty pandas living outside of China.[citation needed] However, reports show that the numbers of wild panda are on the rise.

The giant panda has long been a favorite of the public, at least partly on account of the fact that the species has an appealing baby-like cuteness that makes it seem to resemble a living teddy bear. The fact that it is usually depicted reclining peacefully eating bamboo, as opposed to hunting, also adds to its image of innocence. Though the giant panda is often assumed docile because of their cuteness, they have been known to attack humans, usually assumed to be out of irritation rather than predatory behavior.

The Giant Panda has a very distinctive black-and-white coat. Adults measure around 1.5 m long and around 75 cm tall at the shoulder. Males can weigh up to 115 kg （253 pounds）。 Females are generally smaller than males, and can occasionally weigh up to 100 kg （220 pounds）。 Giant Pandas live in mountainous regions, such as Sichuan, Gansu, Shaanxi, and Tibet. While the Chinese dragon has been historically a national emblem for China, since the latter half of the 20th century the Giant Panda has also become an informal national emblem for China. Its image appears on a large number of modern Chinese commemorative silver, gold, and platinum coins.

The Giant Panda has an unusual paw, with a "thumb" and five fingers; the "thumb" is actually a modified sesamoid bone, which helps the panda to hold the bamboo while eating. Stephen Jay Gould wrote an essay about this, then used the title The Pandas Thumb for a book of essays concerned with evolution and intelligent design. The Giant Panda has a short tail, approximately 15 cm long. Giant Pandas can usually live to be 20-30 years old while living in captivity.

Until recently, scientists thought giant pandas spent most of their lives alone, with males and females meeting only during the breeding season. Recent studies paint a different picture, in which small groups of pandas share a large territory and sometimes meet outside the breeding season.[citation needed]

Like most subtropical mammals, but unlike most bears, the giant panda does not hibernate.

[edit] Diet

Pandas eating bamboo at the National Zoo in Washington, D.C.Despite its taxonomic classification as a carnivore, the panda has a diet that is primarily herbivorous, which consists almost exclusively of bamboo. This is an evolutionarily recent adaptation. Pandas lack the proper enzymes to digest bamboo efficiently, and thus derive little energy and little protein from it.

While primarily herbivorous, the panda still retains decidedly ursine teeth, and will eat meat, fish, and eggs when available. In captivity, zoos typically maintain the pandas bamboo diet, though some will provide specially formulated biscuits or other dietary supplements.

[动物英语作文：熊猫

那天，我妈妈给我买了两只小鸭子。我很高兴，把两只小鸭子放在箱子里，听着它们的叫声，我的心情非常的好。

That day, my mother bought me two little ducks. I am very happy, the two little ducks on the box, listening to their voices, I feel very good.

第二天，我想让同学到我家看看我的鸭子，我给同学打电话，让他来。他看了鸭子，也觉得很好玩。我们把一只小鸭子放在地上，它向前走了几步就摔倒了，它抓了起来，又摔倒了，我们哈哈大笑。我们玩够了，就把小鸭子扔进了箱子里，去玩玩具了。

The second day, I want to have a look to my classmates my duck, I call for students, let him come. He saw a duck, and enjoy it. We put a duck on the ground, it went forward a few steps and then fell, it caught up, and fell down, and we laughed. We play enough, put the duck into the box, to play with toys.

下午，我和爸爸去看小鸭子，看见一只鸭子肚子朝上，翅膀和脚在抖动，它叫的声音很大，好像在哭一样。爸爸把小鸭子扶起来，小鸭子又倒了。我突然想起来我把小鸭子扔进箱子里的事，呀!我是杀人凶手呀!我哭了。小鸭子最后死了，我很伤心。

Afternoon, my father and I went to see the little duck, see a duck belly up, wings and feet in jitter, it sounds great, like crying. Dad put up little duck, duck down. I suddenly remembered that I took the little duck into the box,! I am a murderer! I cried. Little duck finally died, I am very sad.

从那时起，我就开始爱护小动物了。

From then on, I began to love little animal.

The horses are strong, not like the tame cats or puppy dogs.

They look wild and hard to get close. Yet, they will be very timid and friendly after they get to know you. Horses remember the way home. They are also faithful to their masters.

They even understand what you are trying to tell them. Ive heard many stories about how a horse saved his masters life.

Thats also the reason why I love horses. They never betray you.

[我喜欢的动物的英语作文

I like a lot of animals, but my favorite animal is the panda. She comes from China, why did I love her? Because she is very cute, but she was very shy. Her body stout like bears, but the first round tail short, black and white fur and white head and body clear. She staple food of bamboo, but also addicted to love drinking water, most of the giant pandas homes are located near the water in streams, the nearest will be able to drink clear spring.

I like the small animal is a puppy, it whole body covered with white hair, like a regiment cotton candy; The eyes are round, like two gem; The ear is a semicircle, nose is black, short tail, very lovely.

I love to eat bones to it, it will be a piece of a piece, a short period of a short to chew. After it finished eating bones, will be barked and called several voice, as if to say: "small host, thank you."

Whenever I go to school, she will always send me a little way, until I pretended to be angry hit it two or three, it quietly ran home. It not only can drive me to school, also like to race with me, very fast, sometimes, left me for a long walk. At ordinary times, it seems very timid, but when he saw a stranger, but not brave to open eyes of a strangers every move, also called out when key,

It is really a clever and loyal dog!

When I come home from school, but a dog is the most happy time. As long as the dog at home, Im on my way home from school to home some way can always see the dog at the door waiting for me. It saw me, will be shaking his tail to me on the way to here. And then bouncing around after my people predecessors. So clever dog can not likable?

I wish to raise the dog to the white white fat, because its so cute.

我喜欢的小动物是一只小狗，它全身长满白色的毛，像一团棉花糖;眼睛是圆溜溜的，像两颗宝石;耳朵是半圆形，鼻子是黑色，尾巴短短的，很可爱。

我给它爱吃的骨头，它会一块一块，一小段一小段地啃。它啃完骨头后，就会汪汪地叫几声，好像在说：“小主人，谢谢你。”

每当我去上学，她总是会送我一段路程，直到我假装生气打它两三下，它才乖乖地跑回家去。它不但会送我去上学，还喜欢和我一起赛跑，跑得十分快，有时，把我落了一段路程。平时，它看起来很胆小，但看见陌生人时，却又不失威猛地睁着双眼紧盯着陌生人的一举一动，关键时还会大声叫，

它真是一只机灵又尽忠职守的小狗啊!

我放学回家时，可算是小狗最开心的时候。只要小狗在家，我在放学回家的路上离家门口还有一段路总可看见小狗在门前等着我。它看见了我，就会摇着尾巴往我这里飞奔而来，然后在我人前人后蹦来蹦去。这么机灵的小狗能不讨人喜欢吗?

我很希望把这只小狗养得白白胖胖，因为它实在太可爱了。

When the Arctic Ocean freezes over in the autumn, polar bears set off in search of their favorite meals: fatty ringed seals and bearded seals. By the summer, the sea ice begins to melt and break apart. Deprived of access to the tasty seals, polar bears spend the summer fasting. At least, thats whats supposed to happen. As the planet warms, the warmer ice-free season is getting longer and longer. So whats a hungry bear to do?

Scientists once thought that polar bears might survive by supplementing their pinniped diet by turning to terrestrial foods like snow geese, their eggs and caribou.

"Weve had this debate in the literature about whether terrestrial foods are nutritionally relevant to polar bears during the on-land season when the ice has melted."

University of Alberta biologist Nick Pilfold.

"And weve known for a long time, going back to research in the early 70s, even going to back to early explorer logs, that polar bears will consume terrestrial based foods. But the debate was always whether those foods actually add up, energetically." In other words, do these substitutes provide enough nutrition to make up for the lost seals?

To find out, Pilfold and his colleagues estimated the weight lost each day by polar bears in the wilds of western Hudson Bay during the ice-free season, when they could ostensibly be chowing down on terrestrial foods. Then they compared that to the weight lost by bears that are temporarily held in Manitobas Polar Bear Alert Program.

While captive, the bears do not eat. They drop about one kilogram each day. But the wild bears, who had access to the Arctic snack bar, lost the same amount of weight each day. The results are in the journal Physiological and Biochemical Zoology.

"Which is really saying that the terrestrial foods do not have dense enough energy to offset the mass loss. So this idea that bears can just switch from eating sea ice–based food to land food and thats going to help supplement against longer ice-free seasons, that really doesnt show up in the data."

The problem is that polar bears evolved to rely on the marine diet.

"The food on land is protein and carbohydrate based, and the food the polar bears really focus on is fat. Fat is the name of the game for these bears; theyre highly adapted to absorbing that fat into their system and putting it onto their body as body mass, so they can fast on it later on. And the only thing thats going to provide them with that type of fat are marine mammals. And they can only access those marine mammals when theres sea ice."

Adult males can go eight months without food. But younger, sub-adult bears, which are no longer nursing and must hunt, cant last as long without sea ice. So as the Arctic warms, younger polar bears will disproportionately die out. Leaving the species survival in doubt.

北冰洋在秋季结冰以后，北极熊就会出发去寻求它们最喜欢的食物：富含脂肪的海豹和胡子海豹。海冰在夏季开始融化断裂。这使北极熊在夏季无法吃到美味的海豹，所以它们进入禁食期。至少，情况应该是这样。但是由于地球变暖，温暖的无冰季节越来越长。那饥饿的北极熊要怎么办?

科学家曾经认为，北极熊可能会转向陆地上的食物来补充它们对鳍足类动物饮食的需求，进而生存下去，这些陆地食物包括雪雁、雪雁蛋和北美驯鹿。

“文献中有过这类辩论，即在寒冷融化时陆地食物是否能满足北极熊的营养需求。”

尼克·皮尔福德是加拿大阿尔伯塔大学的生物学家。

“通过上世纪70年代初的研究，还有早期的探险者日志，我们很早以前就知道，北极熊会以陆地食物为食。但是辩论的焦点在于，这些食物是否能增加北极熊的能量。”换句话说，这些替代食物能否为北极熊提供足够的营养，弥补不能进食海豹带来的损失?

为了解开这个疑惑，皮尔福德及同事对西哈德逊湾荒野地区的北极熊在无冰季期间每天失掉的体重进行了估算，从表面上看，北极熊在这段时间食用了陆地食物。随后，他们将这一数据与通过马尼托巴北极熊预警计划暂时捕得的北极熊所失掉的体重进行了对比。

在被关期间，北极熊不吃东西。它们的体重每天大约下降1公斤。虽然野生北极熊能享用北极“小吃”，但是它们的体重每天也同样会下降1公斤。这一研究结果发表在《生理学和生化动物学》期刊上。

“显然结果表明，陆地食物不能为北极熊提供足以抵消大量损失的能量。所以，北极熊可以从食用海冰下面的食物转向食用陆地食物，并帮助它们对抗日益延长的无冰季这个观点，并没有在这项数据中得到证明。”

问题是，北极熊进化成了依靠海洋食物的动物。

“陆地食物以蛋白质和碳水化合物为基础，而北极熊需要的食物以脂肪为主。脂肪是这些熊真正需要的东西;它们高度适应的情况是，将脂肪吸收进它们的系统中，然后把这些脂肪放在身上以增加体重，这样它们之后就可以依靠这些脂肪来度过禁食期。唯一能提供给北极熊这种脂肪的就是海洋哺乳动物。但是它们只能在有海冰时食用到这些海洋哺乳动物。”

成年北极熊可以8个月不进食。但是小一些的未成年北极熊已经不再被哺育，它们必须要去猎食，可是它们不能在漫长的无冰季期间一直不进食。所以，随着北极地区变暖，较小的北极熊将会大批死亡。这使这些物种的生存成为问题。

My favourate animal is tiger,because tiger is very strong and powerful,it is the king of the forest.Tiger looks handsome as well, the skin has two corlors:yellow and black,and they are both my favourate colors.

I like tiger,and the year 201X is just the Chinese tiger year.I hope all the people will keep healthy,just like tiger.