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• area of the study site suzlgests that the larger trees ion the <br />study site may be used #or nesting, However,, ~ra+ .s~esLs <br />were located on the study site. Although no screech owls <br />were observed at the study site., this species may use the <br />site for feeding as~d nesting purposes. <br />.2.5.8 Apodiformes (Swifts and Hummingbirds) <br />Both swifts and hummingbirds ,are only season'al'ly <br />present in the Williams Fork Mountains. Breeding populaticros <br />of white-throated swifts inhabit the sandstonecliffs ~a~cross <br />Hayden Gulch from the study site amd may forage over #h'e <br />site. Broad-tailed hummingbirds are common in t~h+e vicinity <br />Hof the study site during summer and array breed on txse site, <br />Since the faunal survey was eaaflnc'ted after fall migration, <br />neither species was seen. <br />2.5.9 Piciformes (Woodpeckers.) <br />Three species of woodpeckers were $een ~n the study <br />site. Common flickers, hairy woodpeckers wind :dow.ny wood <br />peckers were observed several times on the situ: alii threw <br />species are year-round residents. Hairy woodpeckers were <br />common, being seen in both oak and aspen staa~ds., while <br />downy woodpeckers were seen only in aspen, Although downy <br />and hairy Woodpeckers tend to have complimentary distxi- <br />bmtions, downys are more common at lower elevations. <br />Their presence on the study site may be near theft <br />elevational limit.. Yellow-bellied sapsucRer sap holes <br />were seen in the aspen stands. This species is a.summer <br />resident in the ~ailliams Fork•MOUntains wad probably nests <br />_. on or Tear the site. <br />2.5.1D Passerif.ormes (Songbirds') <br />'The songbirds, or perching'birds, camprise.a.•large <br />order (over twenty families) of small to me$ium ~siaed land <br />birds. Over 100 species of this order are found sn the Y.egion <br />surrounding the study site. Ecological aspects a~ _the <br />~~ passerines ar.e extremely varied. For example, the ~eeding <br />habits may be insectYNOrous., herbivorous (especia'lly fruit8 <br />and seeds), or omnivorous. Many members are highly <br />migratory. Discussion of the .major passerine families <br />and species on or near the study site follows. <br />Flycatchers <br />• A variety of flycatchers are common in western <br />-55~ <br />