Ecologists have at last got to the bottom of why bears rub trees -- and it's not because they have itchy backs. Adult male grizzly bears use so-called "rub trees" as a way to communicate with each other while looking for breeding females, and that this behaviour could help reduce battles between the bears.
Ecologists Get To The Bottom Of Why Bears Rub Trees
- ScienceDaily
- 9. 9 2007 (06:00)