a rare color phase of the timber wolf.
See also: timber wolf
- 1900  Blue Wolf is also an actuality. Once in a while one of the gray wolves grows larger than his fellows, and wears a rich blue-gray coat.
- 1921  As regards the wolves, three varieties are usually available: the prairie or coyote wolf, the large grey or timber wolf, and the blue wolf, which is in great demand on account of its colour.