European polecat European polecat The European polecat ("Mustela putorius") – also known as the common ferret, black or forest polecat, or fitch (as well as some other names) – is a species of mustelid native to western Eurasia and north Morocco. It is of a generally dark brown colour, with a pale underbelly and a dark mask across the face. Occasionally, colour mutations, including albinos and erythrists, occur. Compared to minks and other weasels – fellow members of the genus "Mustela" – the polecat has a shorter, more compact body; a more powerfully built skull and dentition; is less agile; and it
Steppe polecat and black-footed ferret, with which it is thought to have shared "Mustela stromeri" as a common ancestor. The steppe polecat likely diverged from the European polecat 1.5 million years ago based on IRBP, though cytochrome b transversions indicate a younger date of 430,000 years. As a species, the steppe polecat represents a more specialised form than the European polecat in the direction of carnivory, being more adapted to preying on larger rodent species; its skull has a stronger dentition, its projections are more strongly developed and its muscles of mastication are more powerful. The steppe polecat's growth rate is also