The Washington weasel is the largest weasel known to occur in the park, measuring around fifteen inches in total length. During the summer it is dark brown above, darker on the head, with the under parts a dull yellow, lighter on the chin and throat. About two inches of the tip of the tail is black. In the winter its coloration may range from a dull brown, with white underparts, to almost pure white except for a yellowish tinge on the belly, rump and tail. The black tip of the tail remains unchanged.
Specimens in park collection: RNP-45, RNP-79, RNP-82, and RNP-94; Longmire Museum, Park Headquarters.
Weasels inhabit practically all of North America. The Washington weasel is found in the Cascade Mountains of Washington and Oregon, at least as far south as Fort Klamath, Oregon. One specimen is reported from the Chicago Field Museum as having been taken from Happy Lake in the Olympic Mountains.
In the park it is found from the lower elevations to forest line and above, being especially common around the open valleys between 4,000 and 5,000 feet.
Around Paradise Valley this weasel has found excellent hunting near the Lodge and Inn. Here visitors spend considerable time feeding chipmunks and ground squirrels, and attract large numbers with the quantities of food offered. With the slopes literally swarming with choice tid-bits, weasels have taken over each summer and created havoc among the chipmunks and ground squirrels, not to mention arousing the ire of all visitors concerned. Yet some check is necessary on these rodents, which might otherwise multiply beyond the ability of the habitat to support them. In spite of the efforts of the angry onlookers, mother weasel will dodge her way out among the fleeing animals and capture one to take home for her young. Records show that families of weasels have lived beneath the Lodge and Guide House for several years, reaping a rich harvest of food each summer from the rodent population.
LEAST WEASEL, ERMINE
Mustela ermina gulosa Hall
The least weasel is small, with a total length of around ten inches. In the summer it is dark brown above, darkest on the head, with the underparts whitish, usually tinged with pale yellow. The tip of the tail is black. In the winter the coat may range in color from a light brown among animals at lower elevations to a pure white at higher altitudes. The tip of the tail remains black, however.
Specimens in park collection: RNP-70, RNP-87, and RNP-111; Longmire Museum Park Headquarters.
This weasel ranges through the Cascade Mountains from southwestern British Columbia to Southern Oregon.
It is found in the park throughout the forested regions, and up as high as forest line, but is most abundant in the lower elevations.