Northern pocket gopher (Thomomys).—In "July, 1939, near Stillwater [Nevada], Alcorn pursued . . . [a] weasel and caused it to drop . . . a pocket gopher [Thomomys bottae] which was about two-thirds grown" (Hall, 1946:192). Grinnell, Dixon and Linsdale (1937:233) write that "at least twice, weasels in the [Yosemite] Valley were seen carrying pocket gophers." Relative to Thomomys talpoides in the vicinity of Treesbank, Manitoba, Criddle and Criddle (1925:146) record that on September 11, 1918, an individual of Mustela frenata longicauda took seven pocket gophers dead. . . . It seized the rodents by the middle of their back and held them high while carrying them away. They were stored in a gopher burrow some two hundred yards distant. On February 17, 1921, "Came across the marks of a weasel carting some object over the snow. An investigation revealed a recently-killed pocket gopher with its captor still in possession." Criddle (1930:279), at Aweme, Manitoba, "frequently observed this weasel [M. f. longicauda] . . . carrying a pocket gopher to its larder, and twice it has been encountered in mid winter with freshly killed gophers in its possession." The evidence already presented that weasels levy heavily on pocket gophers is strengthened by the many references in the literature to weasels having been caught in traps set for pocket gophers in the burrows of those rodents and by the many statements, not quoted here, that living quarters of weasels are in burrows made originally by pocket gophers. For example, the present writer, in an account of the Mammals of Nevada (Hall, 1946:191, 192), has said of the long-tailed weasel, Mustela frenata nevadensis, that "All the three dens that were excavated . . . were originally burrows of pocket gophers. . . . Although we have found weasels in many situations in Nevada, . . . they most often were obtained from the burrows of pocket gophers." Excluding the weasels taken by Alcorn, more specimens of the remaining lot were caught in traps set in the burrows of pocket gophers than by all other means combined. All of the 22 weasels taken by Alcorn [within a radius of 10 miles of Fallon] were obtained in gopher traps.
Mexican pocket gopher (Cratogeomys).—At Chalchicomula, 8000 feet, Puebla, Nelson (1918:470 and letter dated March 9, 1928) saw a weasel fastened to a pocket gopher. Nelson obtained the pocket gopher and found that its neck muscles were torn loose from the skull.
Grasshopper mouse (Onychomys).—Barber and Cockerell (1898:189) found remains of this mouse in the stomach of a weasel at Mesilla Park, New Mexico.
White-footed mice (Peromyscus).—Green (1936) saw a weasel in Gratiot County, Michigan, in May, carrying a Peromyscus. Quick (1944:76), in winter, in Michigan, found one dead, probably killed by a weasel. From Washtenaw County, Michigan, Quick (1944:77) examined 294 scats of free-living weasels and found Peromyscus in 189 scats, Microtus in 83, small birds in 20, red squirrel in 3, and hair of weasels in small quantities (probably from the animals which deposited the scats) in 36. He concludes (op. cit., 78) that the winter food was 65 to 70 per cent Peromyscus, 23 to 33 per cent Microtus, and 2 to 7 per cent small birds.
Wood rats (Neotoma).—A female long-tailed weasel weighing 250 grams was taken one mile north of Kent, Texas, while eating a Neotoma albigula (Davis and Robertson, 1944:263). A wood rat house under observation by Vestal (1937:364) in Contra Costa County, California, was invaded by one weasel which ate two adult wood rats (Neotoma fuscipes) and one young. In the same area he saw a weasel in a wood rat nest some months later (Vestal, 1938:5). Three miles east of Reno, Nevada, on May 13, 1936, W. B. Richardson watched a long-tailed weasel carrying a half-grown round-tailed wood rat (Neotoma lepida) across a rock slide (Hall, 1946, 192). Harper (1927:303) records three wood rats [Neotoma floridana] and two cotton rats [Sigmodon hispidus] found dead in the den of a female weasel and her three young in the Okefinokee Swamp of Georgia. Another female and three young approximately half grown were found in the swamp in a hollow pine log. Contents of the den as described to Harper were nearly a peck of wood rats, whole and in pieces; remains of several kinds of birds including robins and quail, and a piece of joint snake (Ophisaurus ventralis).
Meadow mice (Microtus).—Polderboer, Kuhn and Hendrickson (1941), in 1939, at Ames, Iowa, identified "A total of 118 items . . . in 97 winter scats and 48 in the 38 spring scats." Their combined data are as follows:
| Frequency | Percentage | |
| Meadow mouse | 71 | 42.85 |
| Harvest mouse | 36 | 21.75 |
| Deer mouse | 17 | 10.23 |
| Mearns cottontail | 14 | 8.42 |
| Short-tailed shrew | 9 | 5.42 |
| House mouse | 3 | 1.86 |
| Tree sparrow | 2 | 1.02 |
| Grasshopper | 1 | .60 |
| Shaw pocket gopher | 1 | .60 |
| Least weasel | 9 | 5.40 |
| Unidentified material | 3 | 1.85 |