Natfield - 1934 Colo. R., 1/2 mi. N Calif. Nev. Monument, 500 ft., Clark Co., Nev. February 2, 1934 two miles north by airline, exploring the edges of the sloughs on the west side of the island, but could find no cotton rat sign whatever. I shot two ruby-crowned kinglets, a junco, a Gambel white-crowned sparrow, a gila woodpecker, a red-winged blackbird, and a robin. Saw in addition - a great horned owl, a red-tailed hawk, a great blue heron, a grassal thrasher, a pipit, a flock of mountain bluebirds, a sage thrasher, an Audubon warbler, a myrtle warbler, gilded flicker, and a kingbird. The birds are scarce out on the middle of the island, most of them staying close to the slough on the western side. Got back to camp about noon and put up several birds and a cotton rat. A 5:00 P.M. went over trap-line again, but caught nothing except an Albert towhee. Three traps were springing, but not where there were good cotton rat signs, so it seems likely that we have trussed out the greater part of the colony. Will probably pull traps in tomorrow morning.