BRUCE M. HERMAN / SCIENCE PHOTO LIBRARY BRUCE M. HERMAN / SCIENCE PHOTO LIBRARY
Brown bear (Ursus arctos) mother and cub, feeding in Alaska, USA. A brown bear cub will stay with its mother for 2-3 years, feeding on its mother's milk for the first year. After that, it will be mainly vegetarian, feeding on a wide variety of plants. It can live for 15-20 years. Brown bears will also eat meat when it is available. Brown bears in North America are also called grizzly bears. In Alaska, they can grow to be 2-3 metres tall and weigh over 700 kilograms. Brown bears are mainly solitary animals, foraging in mountains and river valleys in Eurasia and north-western North America. Photographed at McNeil River State Game Sanctuary, Alaska, USA.
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