Wildlife of China are short, furry animals with short, rounded ears and thick fur, but they differ markedly in size, habit and habitat. The sable, a species of marten, is prized for its fine fur, which along with ginseng and deer antler velvet, are known as the "three treasures of Manchuria." The sable is found in Manchuria (also called the Northeast) and Altai region of northern Xinjiang. The beech marten of western China and yellow-throated marten of southern China are closely related to the sable. The Siberian weasel, known locally as the "yellow rat wolf," is the most common weasel in China. It
American marten the larger fisher. The Newfoundland subspecies of this animal ("Martes americana atrata") is considered to be threatened. The Pacific Northwest subspecies, the Humboldt marten, is even more so, with only a few hundred individuals remaining. Compared to other carnivores, American marten population density is low for their body size. One review reports population densities ranging from 0.4 to 2.5 individuals/km. Population density may vary annually or seasonally. Low population densities have been associated with low abundance of prey species. Home range size of the American marten is extremely variable, with differences attributable to sex, year, geographic area, prey availability, cover