The long-tailed weasel resembles the ermine but has a longer tail ... This is the only other member of the weasel family in the Adirondacks to develop a white coat in winter (December-March or April).

It doesn’t help that both change color from brown to white in winter, emerging with sleek pale cream coats. Long-tailed weasels, the larger of the two, are 7-13 inches long and weigh up to 5 ounces.