American marten canadensis"), mountain lion ("Puma concolor"), fisher ("M. pennanti"), wolverine ("Gulo gulo"), grizzly bear ("Ursus arctos horribilis"), American black bear ("U. americanus"), and grey wolf ("C. lupus"). In northeastern Oregon, most predation (67%) occurred between May and August, and no predation occurred between December and February. The fur of the American marten is shiny and luxuriant, resembling that of the closely related sable. At the turn of the twentieth century, the American marten population was depleted due to the fur trade. The Hudson's Bay Company traded in pelts from this species among others. Numerous protection measures and reintroduction efforts have allowed
Beech marten in the Kettle Moraine State Forest, and in nearby woodlands of Walworth, Racine, Waukesha and probably Jefferson Counties. North American beech martens are likely descended from feral animals that escaped a private fur farm in Burlington during the 1940s. They have also been listed as being released or having escaped in 1972. "" British zoologist George Rolleston theorised that the "domestic cat" of the Ancient Greeks and Romans was in fact the beech marten. Pioneering marine biologist Jeanne Villepreux-Power kept two tame beech martens. Although the beech marten is a valuable animal to the fur trade, its pelt is inferior