These are the frequencies at which colors appear for animals in Yukon Valley. For the vanilla balances, see this article.

Canada Goose:
85%  Gray-Brown
14.2%  Brown Hybrid
0.4%   Gray
0.2%   Melanistic
0.1%   Light Gray Leucistic
0.1%   Bald Leucistic

Caribou:
49.6%  Light Brown
49.5%  Dark Brown
0.4%   Piebald
0.2%   Melanistic
0.2%   Leucistic
0.1%   Albino

Gray Wolf:
74.5%  Gray
24.6%  Dark Gray **
0.4%   Red-Brown
0.2%   Melanistic
0.2%   Egg White
0.1%   Albino

Grizzly Bear:
75%    Gray-Brown
24.7%  Brown **
0.2%   Melanistic
0.1%   Albino

Harlequin Duck, Male:
66.4%  Dark Gray
33.3%  Piebald
0.2%   Melanistic
0.1%   Albino


Harlequin Duck, Female:
66.2%  Dark Gray
33.1%  Dark Brown
0.4%   Dark
0.2%   Gray
0.1%   Albino

Moose:
33.1%  Brown
33.1%  Tan
33.1%  Light Brown (male) / Dark Brown (female)
0.4%   Piebald
0.2%   Melanistic
0.1%   Albino


Plains Bison:
24.9%  Brown
24.9%  Light Brown
24.9%  Dark
24.8%  Light Gray
0.2%   Melanistic
0.2%   Leucistic
0.1%   Albino

Red Fox:
33.1%  Red
33.1%  Orange
33.1%  Dark Red
0.4%   Piebald
0.2%   Melanistic
0.1%   Albino

** This is a rare color in vanilla.