Siberian fur trade best quality fitch fur comes from Siberia. The fitch, or European polecat, is a ferret-like animal, and the corsac is a type of fox that is also found in Siberia. However, these furs are less popular because foxes are common to virtually every fur-trading country in the world. The Siberian ushanka is a full fur hat, consisting entirely of warm fur. It is commonly made out of black foxes, red foxes, silver foxes, shadow foxes, blue foxes, brown foxes, raccoons, martens, or black beavers. It covers the top of the head and comes down to also cover the ears and
European polecat ferrets likely derive. The theory of a Mediterranean origin is further strengthened because the ferret is less tolerant of cold than northern polecat subspecies. The ferret is also more fertile than the polecat, producing two or more litters annually, as opposed to just one. Unlike other subspecies, which are largely solitary, the ferret will readily live in social groups. The ferret is also slower in all its movements than the polecat, and hardly ever makes any use of its anal scent glands. Overall, the ferret represents a neotenous form of polecat. , seven subspecies are recognised. The appearance of the