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km) . The white-crowned sparrow was the Trost abundant s De-cies encountered <br /> (58.7 individuals/km ) and showed an affinity for this type. <br /> The song sparrow was observed only in the riparian habitat during the winter <br /> surveys and was observed in sufficient nu;i1ers to indicate an affinity for <br /> this type . 17he other species whicli showc-�d an affinity for riparian habitats <br /> during winter surveys was the Oregon ;unto. <br /> Alfalfa field. Three passerine species were observed in the alfalfa field <br /> during the winter surveys: western meadowlark, white-crowned sparrow and <br /> raven. The western meadowlark and white-crowned sparrow were therrost abundant <br /> passerines encountered with relative abundance indices of 35.3 and 12.0 <br /> individuals/kr,, respectively. This habitat supported the second highest <br /> total avian population (50.0 individuals/km) and the second highest species <br /> diversity index (0.78) . The western meadowlark was observed only in the <br /> alfalfa type during the winter transects and exhibited an affinity for this <br /> type. <br /> Juniper. The juniper vegetation type supported three passerine species <br /> during the winter surveys: Oregon junco, white-crowned sparrow and raven. <br /> ine forrrer species was the most abundant species encountered (15.3 individuals/ <br /> km) . This habitat type supported the third highest total avian population <br /> (17.3 individuals/km ) . The species diversity index (0.43) was <br /> relatively low because most observations were of the Oregon junco. Accordingly, <br /> the Oregon junoo exhibited an affinity for t-e juniper type. <br /> Grassland pasture. The only two passerine species encountered in the grassland <br /> pasture habitat during the winter passerine transects were the raven and ccriz n <br /> crow. This habitat supported the second lowest total avian population (3.3 <br /> individuals/IuTJ . The Shannon-Weiner species diversity index was 0.50. <br /> Upland sagebrush. The raven was the only species encountered along the sage- <br /> brush transects during the winter surveys. Accordingly, the Shannon-Weiner <br /> diversity index was 0.0. This habitat supported the la;?est total avian po:�u- <br /> lation (2.0 innividuals/;cn) during the winter survey. <br /> -35- <br /> J U p 1 1 1960 <br />