Roford 1955 41 Cynomys ludovicianus February 2, 1955. Wind Care N.P., S. Dakota. done, due lack labor. Poisoning terminated by o'day last fall. This I got from film (obtained). Grazing has been much reduced by taking off about 1000 elk & many Bison within last few years & an E.W. fence at old N. boundary has been taken down to increase freedom movement of Bison. February 3, 1955 Yesterday afternoon, day after snowstorm with about 10" snow, Half overcast, 4 moderate wind, I saw no C.L. out from 2:00 to 3 p.m. in Bison Flats & Norbeck Dam town. February 5, 1955. Still moderate wind (10-15 mph.) from W., but sky nearly clear. At 11 a.m. I walked around in Norbeck Dam town & found round hole in snow surface within 2mi one cota burn on where a C.L. had come up; I saw one out on all fours at 11:05 (he went down into hole in snow; no mound visible above surface; clouded approach to 100yds.). Another seen out 11:15. (Temp. 2 °C., shade, 8" height). This town mainly in broad gently sloping basin, but mounds on parallel flat down ridges around, & a few have spilled over to across a creek to N.W. Many mounds show above snow surface. They may well break wind velocity near ground & cause snow to drop, as decrease soil blowing & increase moisture. 11:35, viewing for road, none out. 11:30 p.m., more out on flatfish windy N. portion of Bison Flats town, to near highway, but at least 5 in a wide draw farther S. S. slope especially, the only 5 to 10%, as if sunshine stimulated emergence. At 3 p.m. with mod. S.W. wind, 12 seen out on 5-fooing slope of this draw, +4 m opposite