The long-tailed weasel resembles the ermine but has a longer tail, 9.5-16 cm (3.6-6.3 in) in length and greater than 44 percent of the head-body length. This is the only other member of the weasel ...

Short-tailed weasels or ermines average 6-8 inches in length and weigh only 1-2 ounces. The long-tailed weasel’s tail is approximately half again the length of its body, while the Ermine’s ...