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• in September, 1979. <br />No Cooper's hawk nests were located on or near the study area during the field <br />investigations in 1979. The Cooper's hawk is a tree nesting raptor, and <br />oortmonly nests in a large stand of cottonwoods along a stream (Call 1978). <br />Potential nesting habitat does not exist on the Nucla study area. Nesting <br />opportunities exist in the crottonwood stands along the irrigation canal lo- <br />cated approximately 1~, miles east of the mine permit boundaries, <br />RDUgh-legged hawk. Fugh-legged hawks breed in Canada and Alaska and winter <br />througYuut western United States (Call 1978}, One rough-legged hawk was <br />observed flying over the juniper habitat type approximately '~ mile south of <br />the mine headquarters in January, 1980. This individual was probably over- <br />wintering in the area. <br />American Kestrel. The Nucla study area occurs witltin the stumps and breeding <br />range of ttie American kestrel, One kestrel was observed in the eastern boundary <br />. of the study area in September, 1979. Nesting habitat of this shall falcon <br />includes ledges on cliff faces (in treeless areas) and holes or cavities in <br />trees (Call 1978). No kestrel nests were located on or near the Nucla study area <br />during field investigations in 1979. Potential nesting habitat in the study <br />area exists in the trees along the riparian Habitat and in the grove of trees <br />rnrtl:. east of the farmhouse. <br />Marsh hawk. The Nucla study area is occasionally year-round range of the marsh <br />hawk (Fabbins et al. 1966) Only one marsh hawk was observed during the field <br />activities in 1979-1980. This individual was observed during the winter <br />passerine transects over the alfalfa habitat type. <br />Upland Game Birds. Only two game birds appear to inhabit the study area: <br />ring-necked pheasant and mourning dove. The occurrence, distribution and the <br />seasonal use of the study area by there game birds and important game bird <br />habitat (i.e. ,nesting) is discussed belay for each of the species observed. <br />Ring-necked pheasant. The ring-necked pheasant is a year-round resident of <br />-38- <br />J U N S 1 1980 <br />