This is the only other member of the weasel family in the Adirondacks to develop a white coat in winter (December-March or April). The terminal one-fourth to one-third of the tail remains black ...

Longtail weasels in more southerly regions don’t turn white in winter, and the ones in the transition zone turn only partially white.

Coat: Ferrets can be white, cinnamon, chocolate, sable, or brown. They also have white, cream, or black marks and their legs and tails are always darker than the rest of their bodies.