Fur clothing left their original pattern and color. Fur may be shorn down to imitate the feel of velvet, creating a fabric called shearling. Common animal sources for fur clothing and fur trimmed accessories include fox, rabbit, mink, raccoon dogs, muskrat, beaver, stoat (ermine), otter, sable, seals, cats, dogs, coyotes, wolves, chinchilla, and opossum and common brushtail possum. Some of these are more highly prized than others, and there are many grades and colors. In Europe and Asia, cheap and plentiful dog and cat fur is sold under different names to disguise the origin from shoppers in the United States, such as
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