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L <br />bridges or other verticzl structures. The lack of such <br />__ structures near the study sit= suggests that barn s~rallo~•r <br />'use of the study site is limited to feeding. Tree swallows <br />may nest in the aspen stands on the study site. <br />~~ Javs and Mzcaies <br />Thre=_ corvids :were seen on the study site (conmon <br />j' raven, Stellar's jay and magpie) and a fourth (scrub jay) <br />]_ was seen in the vicinity of the site. All four species <br />are year-round residents in the Pilliams Fork Mountains. <br />j Stellar's jays and black-billed magpies probably nest on <br />1 the site. Nests of both species ~•~ere tentatively identified <br />on the site. Although they probably forage on the site, <br />ravens would not nest on the site since they are nor-sally <br />alpine breeders. Scrub jays may nest on the site, but are <br />more common at lower elevations within the Yamod River <br />Basin. <br />~` Chickadees <br />Black-capped chickadees were common on the study site, <br />being seen in all plant co:.ununities er:cent for the sagebrush- <br />snowbery. However, they were most abundant in stands of <br />ozk or aspen. Although no nests were identified, chickadees <br />~. most IiY.e1y breed en *_ze study site. One mountain chickadee <br />was seen on the study site, but this species is more or less <br />confine3 to coniferous forests and would not be a common <br />~~ resident on the site. Both species of chickadees are year- <br />, round residents in the Williams Fork ;Sountains. <br />Wrens <br />Rouse wrens and rock wrens are Y.nown to nest in the <br />study site area. They are sur~uner residents in the Williams <br />Fork Mountains, however, neither species was seen during the <br />surveys. <br />} Thrushes <br />Robins and mountain bluebirds were seen on the study <br />site; both species breed in the area. Hermit thrushes, <br />which were not seen during the surveys, are sun•.mer residents <br />~_ of the Williams For: Mountains, breeding in mountain s~~-ub <br />habitat. -~ <br />~' ~ Ainclets <br />Ruby-crowned kinglets are year-round residents in the <br />Williams Fork Mountains and were seen in the aspen stands. <br />Bowever, their presence on the sit= is probably confined to <br />]- the aspen. <br />3 <br />-57- <br /> <br />