WHITE OR ARCTIC FOX
PRIBILOF BLUE FOX

Date 1916.
Source http://www.flickr.com/photos/biodivlibrary/6871378566
Author Louis Agassiz Fuertes; Edward William Nelson
Full title The larger North American mammals.
BHL Page URL http://www.biodiversitylibrary.org/page/38088337
Source: https://commons.wikimedia.org/wiki/File:The_larger_North_American_mammals_(Page_426)_(6871378566).jpg

The Arctic fox (Vulpes lagopus), also known as the white fox, polar fox, or snow fox, is a small fox native to the Arctic regions of the Northern Hemisphere and common throughout the Arctic tundra biome. It is well adapted to living in cold environments. It has a deep thick fur which is brown in summer and white in winter.