Kaye 1933. 65 Thompson Canyon Walker Basin - Oct. 20, 1933. mal where is the wood rat; of which we have taken thirteen specimens all those which we have taken, with one exception were taken either in tree nests, or from nests in brushy creek bottoms. All over the hillsides, in every rock pile, are many, and abundant signs of pack rat, but in no case were we able to take one from the rocks. The “one exception”, I took in the middle of an open field. Apparently, the wood rats have all migrated, at once from the rocky hillsides to the stream bottoms. Microtus was taken only in the grass near camp, and under the willows in the creek bottom near camp.