Fisher, Martes pennanti

The fisher is a large member of the weasel family that is native to North America. It is a forest-dwelling predator that currently occupies much of the boreal forests of Canada. Its range extends as far south as the forested areas of the northeastern U.S., the northern Great Lakes, and mountainous portions of the western U.S. Prior to European settlement of North America, this range extended further south into Illinois, Indiana and Ohio, as well as the central and northern Appalachian mountains; however, increased trapping activities by fur traders in the nineteenth and early twentieth centuries helped to extirpate these animals from this region. During the late Pleistocene, the fisher's range extended even further south into Alabama and Georgia. 

Fisher at night

A fisher (Martes mennanti) photographed at night while trying to take bait. Credit: U.S. Fish and Wildlike Service

Carnivora (Dogs, Cats, Bears, etc.)
Mustelidae (Weasels)

Length: Males 90-120 cm (3-3.9 ft), Females 75-95 cm (2.5-3.1 ft) 

Weight: Males 3.5-5.5 kg (7.7-12.1 lb), Females 2.0-2.5 kg (4.4-5.5 lb)

Source: Powell et al. 2003