. Brigham Young University science bulletin. Biology -- Periodicals. HiuciiAM VouNG Univeksity Science Bulletin range and are heavily overgrazed. In addition, the direct infkicncc of Hvestock interests has resulted in the initiation of predator control programs and govennnent trappers periodically remove coyotes, bobcats, and kit foxes. Recreational hunting activities assume major proportions. Almost all parts of the area are accessible by graded dirt roads, and large num- bers of deer hunters in season and rabbit hunters throughout the year utiUze the area for ii'-?«'»gT;s.'«.: Fig. .
. Brigham Young University science bulletin. Biology -- Periodicals. HiuciiAM VouNG Univeksity Science Bulletin range and are heavily overgrazed. In addition, the direct infkicncc of Hvestock interests has resulted in the initiation of predator control programs and govennnent trappers periodically remove coyotes, bobcats, and kit foxes. Recreational hunting activities assume major proportions. Almost all parts of the area are accessible by graded dirt roads, and large num- bers of deer hunters in season and rabbit hunters throughout the year utiUze the area for ii'-?«'»gT;s.'«.: Fig. .3. Sagebrush ami IniiR-hgrass comiiiuiiit\ iif Cedar X'allev. METHODS The stud\' was conducted from December 1966 until August 1970. Most of the field work took placi' duiing the four breeding seasons but observations were recorded during every month of the year. Intensive field work began in De- cember of each \ ear and continued through August. During this time at least weekK' or bi- weekly \isits were made, but often the observa- tion periods were more frequent. Throughout the four breeding seasons the longest interval of time between successive visits was 13 days in April 1970, Field data cards were designed and printed, and copies of that portion of the study area mapped by the U,S. Geological .Survey were Xeroxed. All observations on raptor nests, ac- tivities, and locations were recorded on them and supplemt^nted by tape recorded notes. The major task of the observer during each breeding season involved the location of all raptor nests. These were found by systematically searching all potential nest sites; that is, all cliff lines, rock outcioppings, and wooded areas were methodicalh' examined. Discovered nests were plotted on an area survey map, then gaps in the distribution wen- intensively reexamined lor missed nests or signs of raptor activit\' sev- eral times dmintr the breedini: season. Addi- tional techniques were employed to discover nests; these included obse
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