Grizzly Bears: Adaptations – by Lucas

Grizzlies, also known as Ursus arctos horribilis, are very interesting animals. They are part of the bear family. Grizzlies weigh around seven hundred pounds and their fur color is black and brown. 

They have adapted to produce body heat because they live in Alaska and Canada, so they need thick fur to keep the body heat in. They produce body heat by using the energy that they get from food. When they’re hibernating, they keep their body heat at 88°F. They also have adapted to make dens, because in a den there is less space for heat to leak out.  A common way a grizzly makes a den is by hollowing out a tree or using a cave. A den consists of an entrance, a tunnel, and a chamber. The chamber is usually only slightly larger than the bear in it. Usually grizzlies use their dens in the winter for about five months.

Grizzly bears have adapted to have a diverse diet because sometimes there is not enough fish, plants, or deer. They sometimes even eat insects. They can eat 90 pounds of food a day. Grizzlies have adapted to have large claws that make them able to dig for food. When food is scarce, grizzly bears can stay alive from the food that they ate before, because they can eat ninety pounds a day, if they want, to prepare them for winter and hibernating. Hibernating is when an animal or a plant sleeps for most or all of the winter. Males probably have to eat a lot more food than females because they can weigh double the amount of females.

Grizzlies have also adapted to feed their babies, because it gets food in them that makes them go from one pound (some time in the winter, when they are born) to 20 pounds in spring. They stay with their mother for two to three years.  Grizzlies usually start to mate in July. After they mate and leave their family in their 20s, they live alone for the rest of their lives. 

In summary, grizzlies are adapted to their environment in a number of ways. They have adapted to stay warm, to get food, and to take care of their babies.