Continuing discussions of Darwin's book.
Macroevolution, UI and WSU, Spring 2009
Friday, January 30, 2009
The REAL Reason Ursids Rubs on Trees
There have been several theories as to why ursids rub their backs on trees. Some think that it's a means of marking territories. Another, more recent, claim is that bears actually do this as a means of establishing a baseline "scent similarity." This way, if a new bear enters the territory of another bear there will be less of a chance for conflict because the intruder may think something to the effect of, "Hey, I recognize that smell! This must be his territory. I should probably not fight this dude because he has a lot invested in this particular area of land."* Alternatively, there is the scenario as described in the video; I feel particularly inclined to cast my lot with this theory.