J.R. Alcorn 1938 Neotoma cinerea Jan. 25 /mi. E Weeks, 4200ft., Carson River, Lyon Co., Nevada. The trunks for an additional 2 to four feet. The nest consists of sticks, cactus, leaves or any other loose material that is available close to the tree. The nest, being up in the tree, is dry and when the river comes up and floods the ground it does not get wet. At a distance the nests look like magpie nests. At first glance their rats look like squirrels as they run up into the tree when one disturbs their nest. They jump from limb to limb with ease and I believe much of their life is spent in the trees. The water had been up around some of the trees with nests for several weeks making it difficult for the rats to reach dry land. They would have to swim from 30 to 60 feet to get from the tree to land. Greese wood (Sarcobatus) sticks had been used to make part of the nest & I noted much of the barks had been eaten off these sticks