 Its next closest relatives are the New World Colombian weasel ("Mustela felipei") and the Amazon weasel ("Mustela africana")., 37 subspecies are recognized.The stoat is entirely similar to the least weasel in general proportions, manner of posture, and movement, though the tail is relatively longer, always exceeding a third of the body length, though it is shorter than that of the long-tailed weasel.