This summer here, millions of seabirds nesting provides a rich source of food, and also the seals, whales and other marine animals.Most areas around the Arctic Ocean are flat, no trees. Winter, frozen earth, the ground covered with thick snow. Summer snow melt, thaw the surface soil, plants grow and blossom, as the reindeer and musk oxen and other animals with food. Meanwhile, wolves and polar bears and other predators also depend on other animals to survive predation. Arctic is the world's most sparsely populated areas. Since centuries, the Inuit (formerly Eskimo) sound reproduction from generation to generation here. Recently, the discovery of oil here, so many people came to work here from the south.
The most representative and symbolic animal is the Arctic polar bears.
As the name suggests, polar bears live in the Arctic. Their home in the Arctic ice and the surrounding islands, as well as the adjacent mainland near the coast, was the circumpolar distribution of basic. They generally will not go deep into more northern areas, where the ice is too thick, and even their main prey - seals can not break the ice out, no food, polar bears will naturally not take the risk.
Polar bears living there were classified into six species: Russia Wrangel Island - Alaska Western populations; population in northern Alaska; the Canadian Arctic archipelago population; Greenland population; Norway, Svalbard - 俄羅斯法蘭茲 Joseph Island population and to central populations in northern Siberia.
Polar bear in the bear family animal family are genuine carnivores, they feed seals, especially ringed seals, will also prey bearded seal, harp seal, crown seals. In addition, they also capture the walrus, beluga whales, seabirds, fish, small mammals, sometimes cleaning the carrion. , And other bear species have different, they are not eating the food will not hide after the eat, etc. (This is one great convenience to other animals, such as Arctic fox lazy or similar), even after the fat from time to time to enjoy complete to walk away, know that for them, high-calorie fat is more important than the meat,
Because they need to maintain a warm layer of fat used, also need to store energy when food shortages. Polar bears are not vegetarians do not stick a little, occasionally in the summer they eat berries or plant roots, although they are not high in terms of nutritional value.
Polar bears are excellent swimmers, so that once people believe that marine animals, it is not only the Latin name U. maritimus means "sea" Bear. Polar bears in their lives most of the time (66.6%) were in the "static" state, such as sleeping, lying down resting, or waiting for prey. The remaining approximately 29.1% of the time walking or swimming in the land, 1.2% of the time in the attack prey, what is left is to basically enjoy delicious. There are two kinds polar bear hunting mode, the most common is the "passive" method. They will advance to find the ice seal's breathing hole
And highly endurance waiting several hours in the next. Wait until the seals appear, they will launch a surprise attack, with sharp claws hook to drag the seal up from the breathing hole. If the seals on shore, they would hide in places where seals eye can not see, and then crept to come crawling to launch onslaught. Another model is to sneak into the ice directly under seal until close to the shore before the attack, so the advantage is a direct escape route cut off the seals. Satiate, the polar bears will carefully clean up the hair, the food residue of blood are cleaned.
北極是指地球自轉軸的北端，也就是北緯90°的那壹點。北極地區是指北極附近北緯66°34′北極圈以內的地區。北冰洋是壹片浩瀚的冰封海洋，周圍是眾多的島嶼以及北美洲和亞洲北部的沿海地區。冰冷的海水攜帶著冰山從北冰洋流入大西洋和太平洋。北極地區的氣候終年寒冷。冬季，太陽始終在地平線以下，大海完全封凍結冰。夏季，氣溫上升到冰點以上，北冰洋的邊緣地帶融化，太陽連續幾個星期都掛在天空。北冰洋中有豐富的魚類和浮遊生物，這為夏季在這裏築巢的數百萬只海鳥提供了豐富的食物來源，同時，也是海豹、鯨和其他海洋動物的食物。北冰洋周圍的大部分地區都比較平坦，沒有樹木生長。冬季大地封凍，地面上覆蓋著厚厚的積雪。夏季積雪融化，表層土解凍，植物生長開花，為馴鹿和麝牛等動物提供了食物。同時，狼和北極熊等食肉動物也依靠捕食其他動物得以存活。北極地區是世界上人口最稀少的地區之壹。千百年以來，因紐特人（舊稱愛斯基摩人）在這裏世代繁衍聲息。最近，這裏發現了石油，因而許多人從南部來到這裏工作。
最有代表性和象征北極的動物是北極熊。
顧名思義，北極熊生活在北極。它們把家安在北冰洋周圍的浮冰和島嶼上，還有相鄰大陸的海岸線附近，基本呈環極分布。它們壹般不會深入到更北端的地方，因為那裏的浮冰太厚了，連它們的最主要獵物——海豹也無法破冰而出，沒有食物，北極熊自然不會去冒險。生活在那裏的北極熊被我們分為六大種群：俄羅斯弗蘭格爾島－阿拉斯加西部種群；阿拉斯加北部種群；加拿大北極群島種群；格陵蘭種群；挪威斯瓦爾巴特群島－俄羅斯法蘭茲約瑟夫群島種群以及西伯利亞北部至中部種群。
北極熊在熊科動物家族中屬於正牌的食肉動物，它們主要捕食海豹，特別是環斑海豹，此外也會捕食髯海豹、鞍紋海豹、冠海豹。除此之外，它們也捕捉海象、白鯨、海鳥、魚類、小型哺乳動物，有時也會打掃腐肉。和其他熊科動物不壹樣的是，它們不會把沒吃完的食物藏起來等以後再吃（這倒是大大方便了別的動物，比如懶惰的同類或者北極狐），甚至時常享用完脂肪之後就揚長而去，要知道對它們而言，高熱量的脂肪比肉更為重要，因為它們需要維持保暖用的脂肪層，還需要為食物短缺的時候儲存能量。北極熊也不是壹點素食不沾，在夏季它們偶爾也會吃點漿果或者植物的根莖，盡管對它們而言營養價值不高。
北極熊是非常出色的遊泳健將，以至於曾被人認為是海洋動物，它的拉丁名U. maritimus既指“海”熊。北極熊在它們的生命中大部分時間（66.6%）是處於“靜止”狀態，例如睡覺、躺著休息，或者是守候獵物。剩下約有29.1％的時間是在陸地行走或遊水，1.2％的時間在襲擊獵物，最後剩下的時間基本是在享受美味。北極熊壹般有兩種捕獵模式，最常用的是“守株待兔”法。它們會事先在冰面上找到海豹的呼吸孔，然後極富耐力地在旁邊等候幾個小時。等到海豹壹露頭，它們就會發動突然襲擊，並用尖利的爪鉤將海豹從呼吸孔中拖上來。如果海豹在岸上，它們也會躲在海豹視線看不到的地方，然後躡手躡腳地爬將過來發起猛攻。另外壹種模式就是直接潛入冰面下，直到靠近岸上的海豹才發動進攻，這樣的優點是直接截斷了海豹的退路。吃飽喝足後，北極熊會細心清理毛發，把食物的殘渣血跡都清除幹凈。