Koford Cynomys ludovicianus February 11, 1955 Nr. Ft. Collins, Colo. photed 4 set traps (4 steel) in colay until 2 p.m., None out by then. Ground under snow hard & frozen, but soft and wet on the mounds. Traps buried a sides mounds. I found clear tracks of a mouse (probably Peromyscus maniculatus) that went down into two C.L. burrows. These burrows not opened in snow by C.L.; mouse hole down thru snow into burrow mouth. Rabbit tracks went to same active burrows. Several sets tracks of canids near mounds but no signs digging. One prairie dog track showed digging thru 6" snow, at mouth burrow (in or out?). 3" snow on ground covered this mound, out of sight, but many sticks well above snow. High mounds advantage as stays clear of snow generally. February 12, 1955. Overcast & cold but calm, at 11:30 a.m. visited Spring Canyon Dam colay. One only seen out. Temp. -5 1/2 °C., thin & no sunshine. None in traps or evidence they had been out (latest disturbance & stay in? traps buried). Some sunshine & warm in afternoon but none in three 4 traps by 5 p.m. At 3 p.m. I revisited colay at Lany Gardner's. Saw at least 2 out. Many tracks in snow the snow covered only about 1/5 of ground. I set 5 steel traps at separate burrows showing activity. At edge some mounds where most concentrated in one area, the nut forming a pile. Found several pieces of sherd & broken off prickly pear leaves where C.L. had fed on them. Il Church said eat young wheat plants but not full grain. Whether burrow in ploughed field depends on amt. irrigation.