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The two cranes 'in F were subjected to more human activity <br />than those birds in E and H. The only difference in the F <br />crane's behavior was more frequent vocalizing. In terms of <br />time spent foraging, preening, or nesting, their behavior <br />was similar to the other groups. All groups foraged until <br />approximately 0930 and 1030 then spent more time resting and <br />preening than foraging through 1200. Although evening data <br />is scarce, it appeared that the birds roosted in the fallow <br />fields and sagebrush-grass. <br />DISCUSSION <br />Based on August's and September's inventories of sandhill <br />cranes, five pairs nested in Twentymile Park with a 40% <br />survival rate for the young, above the 22% and 25% survival <br />rate reported by Bieniasz (1979). Since the 76 known pairs <br />of cranes nesting in Northwestern Colorado did not include <br />Twentymile Park (Torres 1978), these five pairs raised the <br />total nesting cranes to 81 pairs and suggested the crane <br />population is increasing. The findings in Twentymile Park <br />also suggested that similar habitats, i.e., stock ponds in <br />agricultural areas, need to be checked for nesting cranes. <br />When agricultural areas are included in the Division of <br />Wildlife's census for sandhill cranes, the goal of <br />establishing 115 crane pairs in Northwestern Colorado may be <br />realized. <br />The cranes in Twentymile Park appeared to adapt to human <br />activity rather rapidly, even to novel stimuli, such as <br /> <br />