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area of the study site suggests that the larger trees on the <br />~j study site may be used for nesting. However, no nests <br />were located on the study site. Although no screech owls <br />_ wer_ observed at the study site, this species may use the <br />site for feeding and nesting purposes. <br />~~ 2.5.8 Anodiformes (Swifts and Hum~nirgbirds) <br />Both swifts and hummingbirds are only seasonally <br />present in the Williams cork Mountains. Greening populations <br />of white-throated scaifts inhabit the sandstone cliffs across <br />~~ Aayden Gulch from the study site and may forage over the <br />_ site. Broad-tailed hummingbirds are conmon in the vicinity <br />of the study site during sum,~er and may breed on the site. <br />Since the faunal survey was conducted after fall migration, <br />neither species was seen. <br />2.5.9 Piciformes (4;oodoeckers) <br />Three species of woodpeckers were seen on the study <br />fJ site. Cemmon flickers, hairy woodpeckers and doarny wood- <br />! peckers were observed several times on the site; all three <br />species are year-round residents. Hairy woodpecke=s were <br />common, being seen in bcth oak end aspen stands, while <br />~_ ~ dovmy woodpeckers were seen only in ashen. Although downy <br />~_ and hairy wocdpeckers tend to have co.;.plimentary distri- <br />butions, downys are more corcon at locaer elevations. <br />• Their presence on the study site may be near their <br />~- elevational limit. Yellow-bellied sapsucker sap holes <br />were seen in the ashen stands. This species is a summer <br />r resident in t:.e Williar.,s Fork Mountains and probably nests <br />L on or near the site. <br />~~ <br />I 2.5.10 Passerifor~es (Songbirds) <br />The songbirds, or perching birds, comprise a large <br />~; order (over t:aenty•families} of small to median-sized land <br />birds. Over 100 species of this order are found in the region <br />surrounding the study site. Ecological aspects of the <br />~! passerines are extremely varied. For example, the feeding <br />J;- - habits may be insectivorous, herbivorous (especially fruits <br />- -and seeds), or omnivorous. Manv me.~nbers 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 />~•~ • <br />_ -55- <br />