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Rcd-tailed hawks (Buteo iainaicensis) This species is a common spring and fall migrant and <br />winter resident on the eastern plains occupying riparian forests, agricultural areas, and grasslands <br />with scattered trees (Andrews and Righter 1992). The western subspecies is the bird most likely <br />occurring within the project area. It is a resident throughout most of Colorado. This bird <br />formerly wintered in greater numbers than at present due to the decline of prairie dogs. <br />American Kestrels (Falco Warverius) The kestrel is a resident throughout most of Colorado and <br />is most numerous in migration. It is a common spring and fall migrant in western valleys, the <br />San Luis Valley, and on the eastern plains. It is uncommon to fairly common. in mountain parks <br />and uncommon in the foothills and lower mountains. This species is most often observed in <br />agricultural areas, grasslands, riparian forest edges, and urban areas. It is also observed in <br />virtually all other habitats, especially in migration. <br />SUNEWARY <br />The majority of mature trees located adjacent to the actual project area will be left in place and <br />protected from impacts by mining and heavy equipment. The trees along the northern bluff base <br />may be removed as mining activities occur, but do not offer adequate habitat for the birds-of- <br />prey using the site now. Adjacent properties offer a consistent preybase, natural vegetation <br />communities, and less noise and activity disturbance to wildlife and birds-of-prey will prefer <br />these adjacent properties for use than the Derr Property.