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• z Common names follow the sequence and spelling if the American Ornithologists Union checklist (1983) and the <br />1985 and 1987 supplements. ' =breeding confirmed for the Nucla East study area. ?' =breeding probable. <br />Underlined species are of confirmed occurence in the study area. <br />' P =Permanent Resident <br />M =Migrant <br />Primary is status presented first. <br />S =Summer Resident <br />W =Winter Resident <br />F/O =Farmsteads and orchards <br />R =Rangeland {"SG1R" on Map 2.04.11-1) <br />P/S =Ponds and Streams ("P" on Map 2.04.11-1) <br />Primary habitat is presented first. <br />S = Swales ("SW" on Map 2.04.11-1) <br />A =Agricultural Areas ("AG" on Exhibit 11-3) <br />s A =Abundant: always seen in numbers <br />C =Common: always seen, but not in numbers <br />FC =Fairly Common: very small numbers or not always seen <br />UC =Uncommon: seldom seen but not a surprise <br />S = Sparse: a surprise but not out of normal range <br />Ca = Casual: a surprise but out of usual range <br />Other medium-sized mammalian species confirmed in or near the study area include the desert <br />• cottontail, rock squirrel, and Gunnison's prairie dog. The cottontail showed a pronounced affinity <br />for the rangeland habitat especially where stands of sagebrush were well developed. Nearly 94 <br />percent (32 of 34) of the cottontail observations recorded during this study were made in or near <br />stands of sagebrush within the rangeland habitat. Rock squirrels were commonly observed on <br />rocky bluffs along Calamity and Tuttle Draws and on spoil piles at the New Horizon 1 Mine. None <br />were seen in the study area itself. Gunnison's prairie dogs were a common and conspicuous <br />element of the mammalian fauna in the study area. Prairie dog occurrence and distribution is <br />quantified in detail in Peabody Attachment 11-2. Most of the 43 prairie dog colonies in this survey <br />were situated in dryland pasture or hay meadows. <br />Birds. A list of the bird species of confirmed or potential occurrence in the New Horizon 2 study <br />area is presented along with their habitat preferences and relative seasonal abundanes in Table <br />2.04.11-5. During the course of field studies,133 species of birds were identified in the study area. <br />These species are taxonomically aligned in 33 families belonging 14 orders. Well represented <br />families include the Anatidae, Accipitridae, Picidae, Tyrannidae, Hirundinidae, Corudae, <br />Muscapidae, and Emberizidae. <br />The road cruise frequency results are presented in Table 2.04.11-6. In the spring, 43 species were <br />• observed. Thirty-eight species were recorded in the fall. Species detected on at least one-half of <br />(Revised March 2006) 2.04.1 1-25 <br />