The fisher is primarily nocturnal, but will occasionally venture out during the day. Usually it spends the day sleeping inside hollow trees or logs.
It is aggressive and will eat just about anything it can kill, especially small mammals, birds, fish, and insects.
It is one of the few carnivores that preys on porcupine. When the porcupine takes refuge in trees, the fisher follows.
Because it is able to descend trees head-first, the fisher attacks the porcupine from above, biting its face — one of the few places without spines — and avoiding its quills.
It may gorge itself for two days on the carcass of one porcupine.
Ready for the next mammal? Check out the Gray Wolf.
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