The American marten is a small weasel with large, triangular ears. Like other weasels, the marten is highly opportunistic, though they prey mostly on small rodents. Unlike their close-cousin, the mink, marten favor forested areas away from the coast. This fur-bearing weasel was transplanted to many islands in Southeast Alaska.
Like other weasels, the female marten is capable of delayed implantation. This means after mating the fertilized egg will remain suspended in the uterus until the body condition of the mother is ready to support the growth of the egg. The egg will then implant into the uterine wall and begin to develop.