Reford 1955 63 Cynomys ludovicianus March 5, 1955. Nr. Fb. Collins, Colo. About 1½" snow last night, about 32°F. max. today. 8/10 cres. at 1:30-2 p.m., at Spring Canyon Dam colony, I could find no footprints at any of usual burrows. Burrows stay in readily after a few days out when can feed well. March 6, 1955 N. Larimer Co., Colo. Drove to Tony Perrman ranches about 3 mi. W. of Norfolk. He has homesteaded here 1907. Many old mounds of large size on this ranch—in a pasture just SE of house, others to N. These in fairly even spacing, about 15 yds. apart to meet. Many had Poto Pogonopygus mounds on them but Tony says the big mounds built by C.L. (ants contribute probably—Ck). Mounds still bare than surrounding ground but Bouteloua & other grasses sprouting on (also Opuntia on + near). No mounds on flattest areas where Tony thought water table higher. A rounded grassy hill about 1 mi. SW. of house had also had mounds, Tony said (prob. too steep—about 30%). From top of 200' high rock-strewn topped hill about 1 mile N. of Barna's house, I could see many regularly spaced old mounds to W. A live colony lay center about ¼ mile N. of this hilltop—old (a year or two) burrows near foot of hill. Cliffs had 3 old eagle nests. I found 3 lower jaws of C.L. near nests. (Many Lepus remains too). Three bars old. Notoma had apparently taken many sticks & bones from casts. Another old eagle nest ¼ mile to S. Saw 2 eagles flying high. Probably part of eagle studies reported by Lee Arnold over mode line. In spite of favorable condition for 1 pair of eagles to nest, C.L. had been very successful in part. Burrows a year or 2 death within 300 yds. of eagle nests. In one area of old