Fact file ： Population: about 20,000 Built: Weight：Male:300-800kilograms Female:150-300 kilograms Height: About meters Other: Cute, kind , strong. Polar bear is a kind of bear. And they are one of the largest carnivorous animals on land. Appearance : The polar bear are in black, but they all have white or yellow fur . They have thick skin, it is easier for them to keep warm. Home: Polar bear can live in a lousy environment ，such as the Arctic ocean. Food : Polar bear is the carnivorous animal,so they like eating meat, especially the seal. They eat sea elephant、white whale or fish, too. Polar bear can eat as much as 70 kilograms of meat a day. But in summer, they maybe eat berries and roots. Life: Polar bear live for about 25-30 years. Behavior: Polar bear often live on their own. The polar bear are good at swimming, so they can catch a lot of food in the sea. To keep warm ,polar bear often spend up to 8 hours sleeping a day. But they needn’t to hibernate in cold winter. Why in danger: Reason1: People are cutting down forests, so the environment get warmer and warmer. The ice of the Arctic Ocean melts, so the polar bear lose their home. Reason2: The sea is polluting by people, so many animals who live in the sea die. The polar bear cannot get enough food. It is important for us to protect them. 本文来源：https://www.wddqw.com/doc/19ab4d98bf1e650e52ea551810a6f524cdbfcbd0.html