Size comparisons

[brotherbear]

Vinay, posting a specific number does not make it a fact. Consider this hypothetical example; let's say that in 1995, every mature male lion on earth is captured and weighed. We add up the number of those weights then we divide by the number of lions. In this way we get the exact average for the mature male lion. Then again, in 2015 we repeat this process. After 20 years, the average will not likely be the same number. 
This is the only way in which we could get the exact average weight of any animal and, of course, this would be absolutely impossible. There are few animals on earth with such a wide variation of weights as a grizzly. Depending on where he lives, a mature male can weigh below 300 pounds or as much as 1500 pounds. The weight range I gave you for the polar bear shows you just how far off the mark your number is. As for a specific number for the average weight of either the polar bear or the grizzly, that would include coming up with the average weight of each population of bears and the number of bears within each given population. Even then, within each population, not every bear is weighed; just a few samples. 
Bottom line; no number can be carved in stone as the absolute average weight of any given animal. Reply