Fisher's inhabit a specific type of forest habitat and are found only in North America. Although they are originally thought to have inhabited areas further south they are now limited to northern areas of the United States and a larger range in Canada. During the late 19th and early 20th centuries the fisher population experienced a major decline in numbers and was almost exterminated in the United States. Recently the fisher has been recognized as an important part of a forest areas food chain since it is one of the few predators able to control the porcupine population. With this in mind, the Pennsylvania Fisher Reintroduction Project was initiated in 1994 as a cooperative venture between Pennsylvania State University and the Game Commission in an attempt to restore the Fisher to a portion of it's previous habitat here in Pennsylvania.
Current indications are that the program has been a sucess.