Individual gorillas were identified by face shape, body shape, and pelage coloration.
It has acquired approximately half of the white winter pelage and was taken on October 12, 1897, at Keechelus Lake.
The winter pelage is brown in all specimens at most localities.
Some of the former return toward the end of August while still retaining most of the winter pelage.
The skin, in brown winter pelage, is stuffed and in good condition.
In late summer the pelage on the tail is markedly worn, and the hairs around its outer margin are broken.
Of the 40 specimens seen in winter pelage, only one is white.
Effects of gonadotropic hormone on the pelage of white winter long-tailed weasels; abstract.
Of the 21 specimens in winter pelage, 17 are white and four are brown.
This is illustrated by three specimens of M. f. spadix in fresh summer pelage from the single locality, Elk River, Minnesota.