写英语动物的作文精选20篇

Do you love animals? Animals and human beings are the owner of this beautiful planet that we all have the right to freedom of survival on this planet, have the right to enjoy nature gives us everything, this is our common homeland.

However, in the eyes of some people, but these animals is some lose your life, no life, no feelings. They are just delicious or money can buy the things on the table, the people in order to kill all kinds of animals and birds, fur clothing and food in order to the so-called "mouth" a lot of killing selling duck, full mountain bird nets, traps set, overrun by shocking animal remains, such as there are numerous unsubstantiated reports that have appeared. Dropped sharply in animal species, some animals have become extinct or endangered, too cruel. Dont know what those people long is the heart of stone, if left unchecked, we can no longer hear birds schools of thought contend, and cant see the fish live the bottom of the sea, many animals will become "according to historical records". The world will no longer be rich and colorful, the world will only greedy human lonely and sad. This is the tragedy of the entire human race.

Have a word said good, protect animals is to love ourselves, any kind of animal in nature are one part of the food chain, a ring is indispensable, the lack of any one ring will upset the balance of nature, to suffer or ourselves, many animals are friends of human beings, human beings are not often divides into the animal beneficial insects and pests? If beneficial insects is destroyed, it is how a situation? If extinction beneficial insects pests also ceased to exist, the survival of the animal extinction is closely related to our life.

To protect animals, cherish life, is that we call, from the bottom of his heart. We should start from around things, care for small animals, care for the weak life, refuse to eat wild animals, refused to wear clothes made of animal skins, animal bones, accessories and supplies. Resolutely resist the behavior of animal cruelty, and animals together for us to build a harmonious coexistence of their homes.

你热爱动物吗?动物和人类一样都是我们这个美丽星球的拥有者，都有权利在这个星球上自由的生存，都有权利享有大自然赋予我们的一切，这是我们共同的家园。

然而在有些人眼中，这些动物不过是一些任人宰割、没有生命、没有感情的东西。它们不过是餐桌上的美味或能换取金钱的物品，人们为了皮衣和食品杀死各种飞禽走兽，为了所谓“口福”大量捕杀贩卖山珍野味，满山的捕鸟网，遍野的捕兽套，令人触目惊心的动物残骸，诸如此类的报道屡见不鲜，不绝于声。致使动物种类大幅减少，有些动物已经灭绝或濒于灭绝，太残忍了。不知道那些人长的是怎样的铁石心肠，如果任其发展下去，我们再也听不到百鸟争鸣，再看不到鱼翔海底，许多动物将成为“据史料记载”。这个世界将不再丰富多彩，这个世界将只剩下贪婪人类的孤独和凄凉。这是整个人类的悲哀。

有一句话说的好，保护动物就等于爱护我们自己，大自然中的任何一种动物都是食物链的一环，一环不可缺少，缺少任何一环都会打乱自然界的平衡，遭殃的还是我们自己，许多动物都是人类的朋友，人类自己不是经常把动物分为益虫和害虫吗?如果益虫都灭绝了，那会是怎样一种情况呢?如果害虫灭绝益虫也不复存在，动物的生存灭绝与我们的生活密切相关。

保护动物，珍惜生命，是我们从心底发出的呼唤。我们要从身边的小事做起，爱护小动物，爱护弱小生命，拒绝食用野生动物，拒绝穿戴使用兽皮、兽骨做的衣服，饰品和用品。坚决抵制残害动物的行为，为我们和动物共同营造一个和谐共存的家园。

Animals are friends of human beings. Most of them are lovely. I like giraffe the most. They are very tall and have many brown spots. They have very long necks, so that they can eat the leaves in high trees. Giraffes are gentle and lovely. They are friendly to people. When I go to the zoo, I always look at them. They move slowly. I can’t keep it as a pet, because it’s so huge. It’s a big pity.

动物是人类的朋友，大部分的动物都很可爱。我最喜欢的是长颈鹿，它们很高而且又很多棕色斑点。它们的颈很长因此可以吃到大树上的叶子。长颈鹿温驯可爱，它们对人类很友善。当我去动物园的时候我总喜欢去看它们。它们动作缓慢。我不能把它当宠物因为它太大了，这有点遗憾。

My favorite animals are rabbits. Rabbit is very cute, chubby, hairy. Its head is small, two long ears, like two big fan inserted in the head, as long as there is a little static and dynamic, it will be kept on the ears before and after the swing. It is particularly beautiful eyes. It also has an endearing three mouth, the above two, the following one. Jigen on both sides of the mouth are thin beard, it always put the two long vertical whiskers were straight, and appears to be very spirited. Small rabbits love to eat green vegetables, red radish, but it is still the most favorite carrot. Rabbit likes to play on the lawn, it danced on the lawn, never mind played with more fun.

Rabbits are very docile personality. It tenaciously to protect their own: it could run very fast to see the wolves, tigers, lions and so on, it flew drilling holes; if hawk Diao it, it will be overturned, with four legs to go into eagle; I very fond of rabbits

我最喜欢的动物是兔子。兔子很可爱,胖胖的,毛茸茸的。它的头很小,两个长耳朵,像两个大风扇插在头上,只要有一点静态和动态,它将保存在耳朵前后摇摆。这是特别美丽的眼睛。它也有一个可爱的三个口,上面两个,下面一个。Jigen两边的口是薄的胡须,它总是把两个长垂直胡须直,和似乎很激烈。小兔子爱吃青菜,红色的萝卜,但它仍然是最喜欢的胡萝卜。兔子喜欢在草坪上玩,它在草坪上跳舞,更不用说玩更有趣。

兔子很温顺的性格。它坚持地保护自己的:它可以跑得很快看到狼,老虎,狮子等等,它飞钻孔;如果鹰叼它,它将被推翻,四条腿进入鹰,我非常喜欢兔子

I have a lot of like small animals. But my favorite animal is dog.

The puppy can be fun! It round little face with a pair of big eyes. Snow-white hair long below four flexible claws.

Familiar with, soon, I and the dog became my good friends. Every day I go to school, also want to go to the dog. Cant, have to again and again to make it home. When I returned home from school, the little dog ran to pick me up from a distance, it legs to pick on me, and with its little nose to smell of my hand.

Sometimes, it is very naughty, and it is the best cat playing with a friend. It is very obedient, as soon as I loudly shout: "the dog, dont tease." It shook tail to coming towards me.

I love my dog, it brought me endless fun!

我有许多喜欢的小动物。可是我最喜欢的小动物是小狗。

这只小狗可有意思了!它圆圆的小脸上嵌着一双水灵灵的大眼睛。雪白的毛下面长着四只灵活的爪子。

不久，我和小狗熟悉了，成了我的好朋友。每天我去上学，小狗也要去。没办法，只好一次又一次把它抱回家。我放学回家，小狗远远的跑来接我，它两腿扒在我身上，还用它的小鼻子闻我的手。

有时，它很淘气，去和它最好的朋友小猫逗着玩。它很听话，只要我大声一喊：“小狗，别逗了。”它摇着尾巴乖乖地朝我走来。

我最爱我的小狗，它给我带来了无穷的乐趣!

Animals are our good friends. People should be friendly to them. But now, many people in China as well as in the world kill animals in order to get money. Its well known that there are many kinds of rare animals in China, such as pandas, golden monkeys and so on. Some people catch or kill them. They use their furs and skins to make clothes and shoes or eat their meat. As a result, a lot of rare animals have disappeared.

What a pity!

At present, our government have made some plans to punish these people. Recently, some nature parks have been built. Lots of money collected for protecting them. For example, some students put on perfom ances or have other kinds of activities to collect money for rare animals.

Its our duty to protect wild animals. As nature is like a big family, man and animals must live together in it peacefully. We must keep the balance of nature. If we do like this, our world will become better and better.

动物是人类的好朋友，人们应该善待它们，但现在，中国和世界上的许多人为赚钱而捕杀动物。众所周知，中国有许多珍稀动物，如熊猫、金丝猴等。一些人捕杀它们是为了用它们的皮毛制衣制鞋，或是为了食用它们的肉。

结果大量的珍稀动物死亡了，真可惜呀!

目前，我国政府已制定出有关严惩不法分子的法律;近来又建起了一些自然公园;人们：也捐款来支持保护动物的活动，如，有些学生通过义演或用其它方式为保护珍稀动物积极筹款。

我们有义务保护野生动物，因为自然就像一个大家庭，人类和动物必须和平共处：我们必须保持生态平稳。

如果人类能这么做，这个世界就会越来越好。

Everyone knows animals are our friends. So we should be friendly to them.

But some people kill the rare animals, such as pandas, golden monkeys and so on in order to get money.

It will cause these animals to disappear soon.

I think our government should punish those people severely who kill the rare animals.

It is our duty to protect the endangered animals.

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。

It was a fine day today and the sun was bright.I visited Beijing Zoo with my classmate， He Song.The animals were so interesting that all the people loved them.When a bear asked for some food by waving its ann， a visitor threw something to it.At once I went up to him and said without thinking，Dont do that.Its bad for it.If you really love them， take good care of them。 His face turned red and answered he wouldnt do that again。

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?

As the new year is coming, many families plan to go the zoo and have fun together. But recently, a tragedy happened in the zoo, a man was bitten by a tiger. The public scared, then later the truth came out that the men tried to skip buying ticket and he went across the limited line. The animal has their nature. Once they are under threat, they will do the horrible thing. If the visitors behave themselves well and do as the tips, then the tragedy won’t happen. But still a lot of people scream and try to throw away the food to the animals, which do harm to the animals. It is everybody’s duty to protect animals.

随着新年的来临，许多家庭计划一起去动物园玩。而最近，动物园里发生了一场悲剧，有人被老虎咬伤。大家都害怕起来，结果真相是那个人试图逃票，还越过禁止线。动物都有自己的本能，一旦受到威胁，他们就会做可怕的事情。如果游客遵从提示、约束自我，那么悲剧就不会发生。但是仍然很多人会大喊大叫，试图扔食物给动物吃，这对动物是有害的。保护动物是每个人的责任。

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.

目前有越来越多的濒危动物,所以如何保护他们一直是我们的重中之重的任务。是不对的人猎杀动物的肉和羽毛,因为他们是我们的好朋友。

我们应该保护他们,而不是杀死他们。大熊猫,这是濒危动物之一,生活在森林和住在竹lealves。他们可以安全地生活在自然保护区。我们应该停止杀害动物和保护他们。

there are many kinds of animals in the world,but not only the humans.we live in the same world,and we should be friends.as everybody knows,the humans are the rulers of the world today,so we should protect our friends--the animals!

but how to protect them?as first,i think we must stop killing the rare birds and animals,especially the young ones.the second,we have to protect the environment,to make the sky blue,to make the grass green,to give the animals a comfortable space to live.it`s not only for the animals but also ourselves.the last,we should tell more and more people why and how to protect the animals,make everyone do this.

“保护地球，爱护环境，不伤害动物就是保护我们人类自己”!所以我养了一只可爱的小狗。

"To protect the earth, protect the environment, do not harm the animal is to protect ourselves"! So I have a cute puppy.

它长得非常精神，身体瘦瘦的，四肢非常灵活，眼睛像宝石一样闪亮，它的鼻子非常灵敏，什么味道都能分辨。它看到陌生人就会把尾巴翘起来—汪汪大叫小狗汪汪大叫，把陌生人吓跑，它看到主人，摇着尾巴跑到主人面前，好像欢迎主人一样。

It looks very spirit, body thin, flexible limbs, eyes shining like jewels, his nose is very sensitive, what flavor can be resolved. It saw the stranger put tail up - barking dog barking, the stranger away, it saw the owner, wagging his tail, went to the master, to welcome master.

它每天都吃我们剩下的饭菜，还吃骨头和肉，从不挑食。它睡觉的时候趴在地上一动不动。夏天的时候，它长长的伸着舌头为自己解暑，冬天它卷着身子，缩成一团，好像请求我帮它盖上一条棉被似的。

It every day to eat the rest of our food, but also eat flesh and bone, not picky eaters. Its bed time lying on the ground. In the summer, its long tongue hanging out for their own summer heat, winter it curled up, curled into a ball, asked me to do it as if covered with a quilt like.

这就是我家的小狗，它非常可爱，也是我最喜欢的小动物。

This is my dog, it Adorable, also is I most like animal.

Children， you grabbed the small tadpoles right， you must know that tadpole grew up to become small frog， the frog can eat insects， so the frog is our humans good friends。 We should protect it， not hurt it。 But some hotels are also sold the frog meat？ Once， dad and his friends took me to dinner。 A waiter said： "you see， this is we store the launch of new specials， stir flogs ball"。 "Chicken is what ah？" I curiously ask， "chicken is the frog。" The waiter said， with a smile。 I was very angry， because they hurt our good friends—frog！ Another thing， he makes a big inspiration。 One day， when I finish school， saw a man at the school gate at little chicks must sell， and I will have mercy on them。 Because the little chicks must first came to this world， away from the mother， away from the mother love and mother warm embrace， and this is what they faced starved to death， the risk of freezing to death。 At that time I thought： we humans are so happy！ When you see here， did you see to protect our human friends—animals！

如果你问我喜欢的小动物是什么？那我就告诉你，我喜欢的小动物是——小狗。

If you ask me what my favorite little animal is? Well, Ill tell you, my favorite little animal is puppy.

我家的小狗的毛是雪白雪白的，宛如雪落在小狗身上似的，漂亮极了！一双眼睛水汪汪的，好似刚刚下过一场春雨，雨点掉进了他眼里似的；它长着长长的尾巴，假如街边的尘土多，就可以用尾巴把尘土扫得干干净净的。

My little dogs fur is white and snowy, like snow falling on the puppy. Its so beautiful! A pair of eyes, watery, as if just under a spring rain, rain fell into his eyes; it has a long tail, if the street dust, you can use the tail sweep the dust clean.

有一次放学回家，我去看小狗。我那着骨头引它来吃，但它不但不吃，还一动不动的，好象被什么烦住了。原来，小狗就要生宝宝了……

Once I came home from school, I went to see the dog. I brought it to eat with the bone, but it not only did not eat, but also motionless, as if by what bother. It turned out that the puppy is going to have a baby......

宝宝出生后，我更疼爱小狗了。但好景不长，不幸的事情发生了。一天，小狗蹲在妈妈停车的位置上，那时妈妈回来了，妈妈一时看不见，小狗又睡着了，不知道。这时，妈妈把车停在那个位置上。就在这时候，小狗被妈妈撞死了。看到这情景，我伤心透了，连续哭了2个小时。

I loved the puppy more when I was born. But the good times dont last long unfortunate thing happened. One day, the puppy squatted in the parking place of mother. When mother came back, mother could not see it for a while, and the dog fell asleep again. I didnt know. At this moment, mother parked the car in that position. Just then, the puppy was killed by his mother. I was so sad when I saw the scene that I cried for 2 hours.

到了这个时候，我对小狗的感情依然还是那么深，我对小狗的死感到恋恋不舍。小狗，我爱你。

At this time, my feelings for the dog is still so deep, I feel unable to part of the dogs death. Puppy, I love you.

The kitten in my mind has always been the most lovely animals, just my house downstairs there is a kitten, I like it very much.

Kitten has a football like face, with above two small pointed ears, a small nose is small. The kittens eyes narrowed into a crack during the day, but at night with big, round, still shining with green light.

Kitty likes to jump up. It is the long tail to keep the balance for it. Cat meat pad to make it under your feet start to quietly, brought a lot of convenience to catch mice.

Cats like to collect some interesting things it. So in its nest can often find little wool ball, feather.

Kittens sleep with your eyes closed, curled up the legs and tail, appear very quiet.

The kittens mouth is very slow. Once, I take a sausage, it instantly intently staring at me, as if to say: "give me a little sausage! Look at it the appearance of this pair of miserable, I think along while, finally gave it in half. It immediately hide to one side, taste with relish.

Oh, cute kitten, I like you!

小猫在我心目中一直是最可爱的小动物，正好我家楼下就有一只这样的小猫，我非常喜欢它。

小猫有一张橄榄球似的脸，上面竖着两只尖尖的小耳朵，一个小巧玲珑的鼻子不大不小。小猫的眼睛白天眯成一条缝，可到了晚上就睁的又大又圆，还闪着幽绿色的光芒。

小猫喜欢上蹿下跳。它那条长长的尾巴为它保持了平横。小猫脚底下的肉垫让它走起路来悄无声息，为抓老鼠带来了不少方便。

小猫喜欢收集一些它觉得有趣的东西。所以在它的窝里还经常能找到毛线球、羽毛之类的小东西。

小猫睡觉的时候闭着眼睛，蜷着腿，缩着尾巴，显得十分安静。

小猫的嘴非常的馋。一次，我拿着香肠经过，它立刻目不转睛地盯着我，好像在说：“给我一点香肠吧!”看着它这副可怜巴巴的样子，我想了半天，最后终于还是给了它一半。它马上躲到一边，津津有味的吃起来。

啊，可爱的小猫，我喜欢你!

I have a cat .Its name is Mimi. Its very lovey.My family all like it.

It always plays with me every day .It has black and white fur.As long as we sayMimi,It right away runs to you.

Its very good!so My family all like it!

In our country, the number of wild animals is becoming smaller and smaller. Some of them are even dying outThe dangerous methods we human being has taken are as follows:

We have been cutting the trees to build houses, so the home of animals is intruded and they have to find new places to live. In this process, some of them died in the new environment.

The abuse of pesticide has also been endangering the life of wild animals.

In addition, in order to earn money, people have been killing the rare wild animals.

In that we have realized the threat of our behavior to our best friends, we should take actions to change such a condition by taking the following methods:

We should protect the wild animal by protecting the environment that they live in and protect themselves, not to hurt them. At the same time, we should establish more natural reserves for the wild animals.

I believe as long as work together to protect the wild animals, our life will be more and more comfortable.

My fish tank with three small goldfish, one particularly attractive. Its eyes bulging, like a pair of big light bulb. Small mouth, a mouth spit out a series of small blisters, like children blow bubble gum. I named it "bubble eyes" three goldfish often play hide-and-seek together. "Bubble eyes" to stay still in one place, after waiting for the other two small goldfish hide well turned to find, but the two small goldfish too cunning, with unnoticed behind the "bubble eyes". Had half a day also can not find "bubble eyes". After a while, it turned to find that the other two small goldfish. I domesticated small goldfish is really interesting!

我家鱼缸里养着三条小金鱼，其中一条特别惹人喜爱。它的眼睛鼓鼓的，像一对大灯泡。嘴巴小小的，一张嘴就吐出一连串的小水泡，像小朋友吹泡泡糖一样。我给它取名“水泡眼”三条金鱼经常在一起玩捉迷藏的游戏。“水泡眼”先停留在一个地方动也不动，等另外两条小金鱼躲好后转身去找，可那两条小金鱼太狡猾了，神不知鬼不觉地跟在“水泡眼”的后面。害得“水泡眼”半天也找不到。过了一会儿，它一转头，才发现另外两条小金鱼。我家养的小金鱼真有趣!

在我四五岁时，妈妈带我去动物园参观了国宝——熊猫。

When I was four or five years old, my mother took me to the zoo to visit the national treasure panda --.

熊猫浑身毛茸茸的，就像一个黑白相间的圆皮球，它还有两个月牙般的耳朵，有一双黑黑的、圆溜溜的大眼睛。

Panda hairy, round ball like a black and white, it also has two crescent shaped ears, a pair of black, round eyes.

熊猫最爱吃竹子，记得那天，那两只熊猫就在架子上拿着竹子津津有味的吃着呢!

Panda bamboo favorite, remember that day, the two giant pandas on the shelf with a bamboo eat with appetite to eat!

吃饱的熊猫十分自在，两只熊猫从架子上跳下来，你追我赶，从那边摇摇晃晃的跑来跑去，它们玩累了，就又爬到架子上靠着休息了一会儿。

Feed the panda is very comfortable, the two giant pandas to jump down from the shelf, race each other, from the other side of the rickety ran, they are tired, they climbed to the shelf with the rest for a while.

熊猫休息完之后，一只熊猫的脚放在了底下熊猫的身上，然后往下一翻，翻到了下面，另一只熊猫把脚放在了另只熊猫的屁股上，脚一蹬，它也翻下去了。这时，惹得旁边的人都哈哈大笑。

After having a rest for a panda, panda feet in the bottom of the pandas body, and then down to a turn, turn to the next, another panda put his feet on the pandas ass, a foot pedal, it also turned down. At this time, everyone was laughing.

这时，妈妈拍了一下我说走吧，可是我还想多看一会儿，但时间不早了，我们依依不舍地走了。

At this time, my mother took me to say go, but I wanted to see for a while, but in time, we went to be reluctant to part.

看了我写的熊猫，你们大家也喜欢熊猫了吧!

See I write the panda, you will like the panda!

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。