Before widespread fur trapping began in the 17th century, there were likely between 100 million and 400 million beavers in North America. Nearly every waterway held beavers. And historical accounts paint a picture of an American West that was relatively wet and green. But by 1900 there were only an estimated 100,000 beavers left in North America. Read more
History of Beavers – a brief history of beaver numbers in North America
