Koford Cynomys ludovicianus April 29, 1955 Larimer Co., Colo. edge of 5' tall green grass (little snow where most activity, but Atriplex & Opuntia canna there), Mr. Jordan intending to poison them C.L. with strychnine grain. // At Estes Park visited James Cole, Biologist of National Park Service. He said that in Wind Cave areas he found colonies stopping short of ridgelines, apparently because of prairie bluestem there. He also said they seemed not to invade Aristida. Now he was working on historical account of Missouri R. basin. He thought grazing heavy when buffalo present, & elk, & Indians with horses. Learned nothing new. April 25, 1955. Visited Sec. 23, 11 mi. N.W. weekly, it took 470 + 0771 from steel traps. 470 small; much digging of roots near dug burrow, starting to melt. 0771, large, no mast. It had dug & trapped itself tight in burrow north poched in with root soil on all sides, fringes & head outside. // Cactus green + 4" long at low spots. Some green grass dies in low spots but not in higher ground between drainage ways. Some dug nests probably Cogewalla of 1 bird another, but much Cogewalla untouched, especially the pubescent kind with swollen deep root. I collected many root remains. A yellow-flowered glabrous Cogewalla (?) canna + root apparently eaten some. Pubescent are often still intact at side of growth a dug spot. Tops of Cogewalla canescens cropped, & new growth continuing. No evidence seen of eating green grass. Avian top bulbs taken rarely. Main false nibble: the 2 Cogewallas & Allium. At Sec. 10 I shot 2 (472, 473) in crevice well inside colony. Compared to Sec. 23, parturition condition good. Atriplex 2-3' high; much Muhlenbergia. A few eastern brook out on one side & apparently dug out by badger. Some old mounds riddled with