Koford 30 Journal May 4, 1955 Lavimer G., Colo. Several banded larks on colony, but no other birds seen. Near Ft. Collins I saw an Cathartes aura. Collected specimens. Somewhat wet day; 1 Dysopodius rufilatus & traps set for them near atrium. May 5, 1955. Six Traps near Ft. Collins held one Cynomyzus. Mopped at CPER colony & shot a g. thaw. Warm & calm today but overcast. Saw 1 Uta at CPER. May 6, 1955 Nr. Ft. Collins, Colo. Strong winds & partly overcast. Ronald Smith visited from Boulder (grad student) & I showed him local Cynomyzus study areas. In afternoon toured local colonies with C.H. Wasser, range man of Colo. A & M. Trapped 1 Cynomyzus, shot another. Took a Syllebogue in one trap (testis 30mm. long). Strong wind all day. May 7, 1955. Local traps held 0 Cynomyzus. Partly overcast. taken, May 8, 1955. Local traps held 1 Cynomyzus. Collected specimens, to date. Overcast with short light shower. May 9, 1955. Took 2 Cynomyzus from traps & shot 3. Overcast with light rain in late afternoon. Examined specimens. May 10, 1955. Took up traps. Shot 2 Cynomyzus. Watched colony near Wellington in afternoon. May 11, 1955. Watched Wellington colony. Shot one Cynomyzus. Clear but 25 mph wind. May 12, 1955. Partly overcast little wind. Office work. Lavimer & Weld. Co., Colo. May 13, 1955. Visited Wellington Cynomyzus colony & saw one group juveniles out. Two apparent Buteo ferrugineus & 2 Marsh Hawks there, latter hunting over cattle area. At CPER colony put in 4 marked stolier. Shot one Cynomyzus for examination. Set live traps. Saw 1 Cratoleus in Cynomyzus burrow (first seen this season). Overcast.