Why do bears rub their backs against trees?

Not because of the unbearable itch, but the grizzly bears rub themselves against the trunk. They did it because they wanted to . talk to other children.

Researchers have proposed many theories as to why the grizzly bear often rubbed itself against the trunk. Some argue that children do this when they are most fertile, while the other hypothesis says that bears are scratching on their backs, or trying to cover them with plastic to scare off insects.

Grizzly bear rubs back against tree trunk.(Photo: BBC)

However, in a recent study on grizzly bears in British Columbia, which lasted two years, digital cameras were used to collect data to see which bears often rub their backs against trees and times. do it. Bears often rub their backs into familiar trees from generation to generation, so tracking them is easy. Satellite devices also help track traces of individual bears.

"Cameras show that male bears are mature or rub their backs into the most trees, and they often move from one valley to another in large routes, marking trees as they go, while looking for mates. ", researcher Owen Nevin from the University of Cumbria, USA, who conducted the study, said.

Nevin thinks that by marking his scent on the trunk, the male bear will know the others better, and may reduce the fights between the men in the search for females.

"Big male bears can be seriously injured or even die when fighting with another one. If a child recognizes the opponent's vapor on a tree trunk in the area, he will know that he has a hard hand to play. , and maybe the best way is to avoid the dangerous challenge. "

They also caught a bear rubbing their backs against trees when a male tried to separate them from his mother (male bears sometimes kill a female's offspring to have a chance to mate with it).

Maybe if you catch a familiar smell, they will be safer. Because children with relatives often have similar smells, they are less aggressive than each other, Nevin explained.

T. An