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species that were en~untered on the aspen vegetation type but not <br />observed elsewhere during the June, 1979 census were hairy woodpecker, gmY- <br />headed junco, black and white warbler, broad-tailed hummingbird, yellow- <br />bellied sapsucker, and song sparrow. Of these species, the hairy woodpecker <br />was seen in sufficient numbers to indicate an affinity far aspen vegetation. <br />A total of 13 avian species was encountered in the riparian vegetation type. <br />The most abundant species observed in this habitat in decreasing order of <br />relative atnmAanpe Were violet~geen Swallow, rough-winged swallow, tree <br />swallow, brown-headed cowbird, and Amerlcan robin. This habitat supported <br />the seoo~ highest avian population (22.7 individuals/km) and evidenced the <br />sewnd highest species diversity iTYjPX (2.16). Five passerine species <br />encotntered in the riparian type that were not observed elsewhere during <br />the June, 1979 census were cliff swallow, rough~vinged swallow, violet~geen <br />swallow, common crow, and Brewer's blackbird. Passerine species exhibiting <br />an affinity for the riparian type wpse rough~ainged swallow, violet~een <br />swallow, house wren, and tree swallow. <br />• The GamUel oak habitat supported a total of 12 passerine species with a <br />total abundance of 16.3 individuals/km. The imst abur~nt species observed <br />in this vegetation type in decreasing order of relative abundance were green- <br />tailed towhee, western flycatcher, black-billed magpie, and American robin. <br />The western flycatcher and black-billed magpie exhibited an affinity for the <br />type. The black~:apped chickadee and mountain bluebird were bbseLVed only <br />in this vegetation type during the June, 1979 sampling. The Shannon~Veiner <br />species diversity index for Gambel oak was 2.02. <br />The mixed brush vegetation type supported a total of 11 avian species. <br />The green-tailed towhee was the most abundant species observed and accordingly, <br />exhibited an affinity for this type. The blue~ay gnatcatcher was observed <br />only in this vegetation type during the June, 1979 survey. This species <br />was observed in sufficient numbers to indicate an affinity for the mixed <br />brush type. The Shannon~einer species diversity index (1.5), and total <br />abtmdanoe (17.7 individuals/km) for mixed brush was the second lowest of all <br />. the types sampled. <br />-37- <br />