The fisher is a large tree-climbing member of the weasel family
that resembles a cross between a mink and a fox. Females average
6 pounds while the much larger males average 10 to 12 pounds.
I believe the record for a fisher is 19 pounds (Maine). Fishers
eat rodents, squirrels, porcupines and other small mammals. They
are the most efficient predator of the porcupine. Fishers were
reintroduced to Pennsylvania in 1994 after having been extirpated
for well over 100 years. These elusive and seldom seen animals
produce 1 to 5 offspring often referred to as kits.