MAMMALS 277 



Alaska; along watercourses, where they feed on fish and all kinds of 

 small animals. The nest is in a hollow log or a hole in the ground, and 

 as many as 12 young may form the litter. 



Fig. 158. — Skull of Muslela vison {from Elliot). 



Subspecies of M . vison 



M. v. vison Scherber. Boreal forests of northern North America; 

 southward to Pennsylvania; Lower Arctic, Hudsonian and Canadian 

 zones. 



