Ko ford 132 Cynomys ludovicianus June 6, 1955 Boulder Colo. Found that Ronald Smith had left for Kansas Univ. to study prairie dogs. Read eagle thesis (MA) by D'etilis (1954). He investigated several eagle nests in foothills from Boulder north & found C.L. remains in them. Including old remains, about 75% of shells found near Ronald Butt's eagle nest (N. Larimer Co.) were C.L. Thesis found in main library. //Visited C. P. Kalmbach, retired from F.W. Service, formerly in charge Denver Lab., & told him about my work. He told me that Crandell (of Montrose, Colo.) has had some experience with C.L. control. Welch (J.F.) has had experience with repellents. Maynard Sum- mings (now Sacramento, Calif.) formerly worked on Grand Mesa gopher project. This started out elaborately but ended in so little of value, mainly because of high remote location. On gopher project some indications moving out when forbs killed by herbicides. Some vegetation studies made too. See records gopher project at Denver Lab. // Per 1080 poison, Kalmbach said this most dangerous all subject poison from standpoint secondary poisoning. Ferrets might well be killed by eating 1080 poisoned C.L. Strychi- ine less dangerous as far as secondary poisoning is concerned. June 7, 1955 Nr. Wellington, Colo. Counted dogs on 2A (±) census area in presence at 10 a.m. After many counts got 11 grouse + 34 juncos. There were 14 juncos, at SW corner where principal ground cover Kochia about 1" high; there might have come from across road, 100 ft. to E., where I saw none last week when 15% or last visit & when I took 2 nothing.