By the beginning of the twentieth century, there were few if any beavers in the Keystone State. Over the next decade, the pair and its offspring reproduced and prospered. By 1934, the population was large and stable enough to allow a trapping season. That year more than 6,000 were harvested. Today, beavers are found throughout Pennsylvania in suitable habitat.
Beavers live in colonies.
A colony is a group occupying a pond or a stretch of stream, feeding from a common food supply, and maintaining a common dam or series of dams. Usually only one family lives in a lodge or bank burrow. Beavers are believed to maintain a certain territory, and colonies do not overlap. This disperses the population and establishes colonies in new areas. Beavers can and do become troublesome for some people.