Large tracts of coniferous or mixed hardwood-softwood forests containing large trees for denning. The fisher's long, slender body, short legs and elongated, bushy tail are usually dark brown to nearly black. The tail, rump and feet are darkest, in contrast to the head and shoulders, which are lighter in color and often grizzled in appearance, especially in males.
Some individuals have a white chest patch.
Fisher have five toes on each foot and semi-retractable claws which contribute to their ability to climb trees. Also, in the Rocky Mountains in Wyoming and the Sierra Nevada in California. In Connecticut, fisher have their young in March and April. The two to four kits are born with closed eyes and are helpless. The few accounts of natal dens indicate that tree cavities are used for birth and the early rearing of young.