Average 2-6 young born in April - May.
Young are born blind and helpless, covered in coat of fine, short, silvery-white hair.
Den is usually under roots of a tree near water, hole in the bank of a stream, house of muskrats that they have evicted or killed.
Chiefly nocturnal and solitary except when in family groups.
Excellent swimmer typically found around stream banks and lake shores.
Tireless wanderers traveling several miles in search of food.