Thanks Heamit
Quote:
Well that narrows it down a bit! 
I appreciate the comment. You are right of course and your comment made me smile.
After that I started my defensive rationalization process: Only with GE can you quickly scan the whole beaver range. Until GE came along totally impossible for the amateur ecologist. And it is of course the Castor Canadensis: just one small example of Canada's heritage in the US
So my next explorations will be focusing on the northern limit of the range, but I will also try my luck in the southern edge, or perhaps somebody will contribute some great sites there!
Thanks