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Active and inactive nests of six species: Red-tailed hawk (Buteo jamaicensis), <br />• Swainson's hawk (BuTeo swainsoni), American kestrel (Falco sparuerius}, great horned <br />owl (Bubo virginiana), long-eared owl (Asia otus), and Cooper's hawk (Accipiter <br />cooperi) have been found in aspen stands. Nests of the short-eared owl (Asia <br />flammeus) and marsh hawk (Circus cyaneus) have been located on the mountain brush <br />communities. <br />The golden eagle (Aquila chrysaetos), prairie falcon (Falco mexicanus) and the <br />turkey vulture (Cathartes aura) were observed hunting in the ores. However, no <br />nests were located nor are any expected to be found within the permit area because <br />suitable nest sites are lacking. The sharp-shinned hawk (Accipiter striatus) and <br />goshawk (Accipiter entilis) are potential nesters in the permit area although no <br />nests were located. The rough legged hawk (Buteo la o us) is the only species that <br />occurs as o winter resident. <br />Habitat use by these birds varies, with aspen areas receiving high use for <br />nesting, but low use for hunting. The opposite is true for The areas reclaimed to <br />gross and forties. No raptor nesting is known to occur in these areas, however, these <br />areas are used extensively for hunting by the raptors. This reflects the high <br />• abundance and vulnerability of rodents and some small birds as prey in these areas. <br />No habitat can be identified as critical hunting habitat for any of these species. <br />All raptors were observed hunting in two or more habitat types. <br />Threatened and Endangered Species -Only one threatened or endangered <br />species was observed adjacent to the mine site: the greater sondhill crane (Grus <br />canadensis Tabida). This subspecies of the sondhill crane is considered endangered by <br />The state of Colorado (Torres et al., 1978). <br />Several greater sondhill cranes were observed on one occasion in September <br />1979 adjacent to Trout Creek. Another pair was observed in May of 1980. Because <br />only two observations were made out of approximately 100 field days, the Trout <br />Creek drainage is not considered to be important as a staging, breeding or nesting <br />area for sondhill crones. No other threatened or endangered bird species ore known <br />to occur on or adjacent to the Edna Mine. <br />Other Species - In addition to species already mentioned, 97 other <br />species have been observed on the mine complex. This total includes 81 passerine <br />species. The most common species are green-tailed towhee (Pipilo chlorura), <br />common crow, American robin (Turdus migratorius), and brown-headed cowbird <br />• (Molothrus oter), which average 2.5, 2.0, 1.6 and 1.6 birds per km, respectively, over <br />six habitat types. The riparian supports the highest number (59) of these species, <br />followed by aspen (49) and mountain shrub (47). <br />2.7-20 <br />