 Males and females look similar. Adult males are 90 to 120 cm (35 – 47 in) long and weigh 3.5 to 6 kilograms (8 – 13 lb). Adult females are 75 to 95 cm (30 – 37 in) long and weigh 2 to 2.5 kg (4 – 6 lb). The fur of the fisher varies seasonally, being denser and glossier in the winter. During the summer, the color becomes more mottled, as the fur goes through a moulting cycle. The fisher prefers to hunt in full forest. Though an agile climber, it spends most of its time on the forest floor, where it prefers to forage around fallen trees. An omnivore, the fisher feeds on a wide variety of small animals and occasionally on fruits and mushrooms. It prefers the snowshoe hare and is one of the few animals able to prey successfully on porcupines. Despite its common name, the fisher seldom eats fish.
