When you think of brown bears, what image comes to your mind? The brown bear's head is large and round, the body is very strong, the muscles of the whole body are amazing, the shoulders are bulging, and the thick fur can better resist the cold. Depending on the season, the color of the brown bear's fur changes between brown and tan.

Brown bears have a wide range of habitats and are mainly distributed in higher mountainous areas, areas with large forests and sparsely populated areas, and they are accustomed to living alone on weekdays. Their diets are plant-based and animal-based, respectively. Among them, plant foods account for two-thirds, including various stems, forages, grains and fruits, etc.; animal foods account for one-third, such as insects, rodents, ungulates, fish and carrion.

The brown bear's speed is amazing. Although they may look large and cumbersome, that's just the surface! Brown bears can run up to 48 km/h, or maybe even faster! This rate may be reached when brown bears are stressed or angry, the researchers said.

The brown bear can stand up to 3 meters and is a common animal in fairy tales. The average lifespan of brown bears in the wild is only 25 years. These huge brown bears do not have any natural enemies except humans, and if there are, they can only be fighting between the same species. Otherwise no other animal can threaten its status. Brown bears have powerful paws that can kill a horse and deer as big as they are with a single slap. Although the brown bear can't retract its claws and is not very flexible, its strength is huge enough to kill its opponent.

In addition to its great strength, brown bears have long, sharp claws that can even reach 15 cm. Its thick and sharp teeth can better crush the bones of prey. Their eyesight is relatively poor, but they have an excellent sense of smell and can spot other animals through their noses.

Every brown bear will find a comfortable nest for himself. Hidden hillsides, under large rocks, and hollow tree holes are all good choices for him. Of course, they will also dig a nest for themselves, and such a nest can often last for several years. Obviously brown bears take care of their lives very well.

Brown bears have the habit of hibernating. In the face of the unusually cold environment and bad weather in winter, the best way to save heat is to sleep more often and reduce the amount of exercise. Therefore, brown bears spend a lot of time sleeping in winter. In summer and autumn, brown bears will store enough fat to cope with the winter, and they will nap in their dens when they are full. When winter does come, they will find a hidden place from the sun and will cover the nest with hay and leaves. After hibernating, brown bears experience a drop in body temperature and a dramatic drop in metabolism, which continues into the spring of the following year.

There are fewer brown bears than you might think. You may think that brown bears are often seen in zoos, cartoons, and toy stores. They must not be rare animals. But in reality, they also urgently need human protection. There are nearly 100,000 brown bears living in the wild in the United States, accounting for more than half of all brown bears in the world. There are fewer than 100 brown bears in Italy and Greece. However, brown bears are estimated to be extinct in some countries. The continued protection of brown bears by humans remains essential.