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• km). The white-cnx~med sparrow was the most abundant species encountered <br />(58.7 individuals/]cn) and showed an affinity for t'us ty~i~e. <br />The song sparrow was observed only i-~ the riparian habitat during the winter <br />surveys and rrs observed in sufficient numt:ers to indicate an affinity for <br />this type . i7'ie other species which showed an affinit}• for ribarian habitats <br />during winter surveys was the Oregon junco. <br />Alfalfa field. Three passerine species wire observed in the alfalfa field <br />during the winter surveys: western meadowlark, white-cra,~med sparrow and <br />raven. The western meadowlark and w~}u te-crowned sparra.~ were the most abundant <br />passerines encountered with relative abundance indices of 35.3 and 12.0 <br />individuals/]cn, respectively. This habitat supported the second highest <br />total avian population (50.0 individuals/',cc:) and the second highest species <br />diversity index (0.78). The western meadaalark 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-civwned sparrow and raven. <br />The former species was the rrnst abundant species encountered (15.3 individuals/ <br />km). This habitat type supported the third highest total avian population <br />(17.3 individuals/Ian). The species diversity index (0.43) was <br />relatively low because frost observations ~,rere of the Oregon junco. Accordingly, <br />the Oregon junw exhibited an affinity for the juniper type. <br />Grassland pasture. The only tHn passerine species encountered in the grassland <br />pasture habitat during the winter passerine .transects were the raven and cor,:;on <br />crow. This habitat supported the second lost total avian population (3.3 <br />individuals/lacJ. The Shannon-'r7einer species diversity index was 0.50. <br />L`pland sagebrush. The raven was the only species encountered along the sage- <br />brush transects during the winter surveys. Accordingly, the Shannon-~~'einer <br />diversity i~xiex was 0.0. This habitat su~.~orted the latest total avian ponu- <br />lation (2.0 irrlividuals/',~n) during the winter survey. <br />-35- <br />JUN ! ~ ~aec <br />