These weasels range over North America and are found throughout most of Alaska. Neither weasel is found on the offshore islands of the Bering Sea or the Aleutian Islands west of Unimak Island. In addition, the least weasel does not occur on the Kodiak Archipelago or on most islands in Southeast Alaska. These furbearers are the smallest members of the family Mustelidae. Other species of mustelids in Alaska include mink, marten, river otter, sea otter, and wolverine.
Weasels are more common than most people realize.
Because they are small, they usually pass unnoticed unless caught in a trap or revealed by their tracks in fresh snow. Weasel tracks resemble those of the larger mink. They generally show four toe prints. The little toe seldom shows except in fresh snow or mud. Each weasel footprint is oval-shaped.