Koford 321 Cynomys ludovicianus December 6, 1955 Nr. Ft. Collins, Colo. dam colony. About 6" fluffy snow on ground, probably no snow since morning of Dec. 3. Looked at nearly all burrows. #15 had scatter tracks at entrance; possibly 1 other with tracks 2' out. Many dog tracks visiting burrows. Cattle still in pasture S. of fence. Very cold, below 0; some recent nights. Rabbit tracks common. December 9, 1955 No snow since last visit to Spring Canyon Dam colony, but strong wind yesterday blown snow about 4" now about 1/3 ground free of snow. I visited about 3/4 of burrows but saw no signs activity above ground. Wind blown snow may have plugged burrows. Usual mouse & rabbit tracks. Basal parts of Balsam still green, so good food available. No eating Opuntia or digging of any sort seen. Snow about 1" tall + ground to N. of fence not nearly as deep as last March. ||No new snow then until Dec. 14, but temps. probably over 50°F. some afternoons. Chester Brookes writes from Medora, N. Dakota, that winter set in early, cold, stormy there. I suspect low survival in Beef Corral town if dry falls + early winter unfavorable to dogs. December 14, 1955 Nr. Wellington, Colo. Visited Wellington preserve. Only about 10% of ground snow covered. Cold breeze but clean & sunny. I saw 2 dogs out at N SE corner colony. They took down at 200 yds. + west dam same burrow. I observed much more Cynomys than outside, but