The Fisher, an agile tree climber, tends to live a somewhat solitary existence. There is evidence that fishers hardly ever travel together, except during the mating season. Found only in North America, the fisher prefers continuous forests that offer opportunity to den in hollow trees. The sagittal crest of a fisher's skull can illustrate the strong sexual dimorphism between males and females of this species.
Skull Length: 12.5cm (4.9in)
Origin: North America