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WILDLIFE RESOURCES ASSESSb1ENT <br />DUCK WORTH PIT, WELD COUNTY. COLORADO <br />range. although mule deer would be expected to occasionally visit the site. The proposed <br />project will not substantially impact large mammal species. <br />Small Mammals <br />Smaller mammals such as desert cottontail rabbits (Svlvilagus crudubonii). deer mice <br />(Peronnscus nzaniculatzrs) and pocket gophers (Geonai~s bursariur) also utilize the habitat <br />within the project site. Desert cottontails were observed using abandoned prairie dog <br />burrows. Signs of digging by pocket gophers were observed in a few locations in the <br />northern portion of the site. As described above. prairie dogs are locally common in the <br />project area. <br />Birds <br />Many species of birds occur in the grasslands and cultivated areas of the project area. <br />Western meadowlarks (Sturnella neglecta) and homed larks (Eremophila alpesa•is) are <br />especially common in the grasslands. Other bird species observed during fieldwork. <br />Ewopean stazling (Sturnus vutgaris), rock dove (Columba Livia), redwing blackbird <br />(Agelaius phoeniceus), American robin (Turdus migratorius), black-billed magpie (Pica <br />pica). killdeer (Charadrius vociferous), brown-headed cowbirds (zhlolothrus arer), and <br />common crackle (Ouiscalus quisculcr). The western meadowlark, horned lark. American <br />robin. black-billed magpie, and killdeer probably nest at the site. The robin, starling. roci: <br />dove. and house sparrow are species commonl} associated with urban or suburban areas <br />and probably breed in the surrounding developed areas or farmsteads. <br />Bird \ests <br />A survey for active migratory bird nests, including raptor nests, was also included as <br />part of the site assessment. The Migratory Bird Treaty Act protects raptors and migraton <br />birds. If an active nest or a tree containing a nest of any migratory bird species needs to <br />be removed, the U.S. Fish and Wildlife Service should be contacted to obtain a nest <br />depredation permit. <br />A through search of the site found veq~ little evidence of tree nesting bird species. A <br />cup nest, likely constructed b}' a robin, was found in a balsam/elm grove in the southwest <br />10 ERo <br />Resomres <br />Carpomlion <br />