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• <br />Lorenciro Carron Mine - tY/dli(e Technical ReOan <br />TABLE W-6 (continued) <br />LORENCITO CANYON MINE <br />BREEDING BIRD COUNTS <br /> Coefficient of <br /> Variance <br />Habitat/Species n' Density #/acre (Percent) <br />Scrub Jay 1 nc <br />Vesper Sparrow 1 nc <br />Unidentified Birds I nc <br />All Species 48 0.8 22.2 <br />1. n =number of observations. <br />2. nc =Insufficient information for calculating density. <br />The coniferous forest type had the fewest with three species detected. At least 20, 16, 9, and 12 <br />species occurred in the coniferous forest, grassland, mountain shrub, and oak/pinyon types, <br />respectively. <br />Densities of birds within each habitat type (all species) varied from 0.8 birds/acre to 79 birds/acre. <br />Generally, the coniferous forest and oak/pinyon had higher densities. This trend is not unexpected <br />because bird species diversity, and hence overall bird densities, usually increase with vertical <br />• habitat structure (Hoover, 1984). <br />Table W-6 also summarizes calculated densities for individual species with at least five <br />observations. Although the information is useful, the standard errors indicate a need for a larger <br />sample size. <br />Other Wildlife Groups <br />Several species that were not the object of specific surveys were observed within the permit area. <br />These observations include reptiles, amphibians, predators, and waterbirds. However, these <br />observations were very limited. <br />Reptiles and Amphibians <br />The CDOW has indicated that 23 reptile and amphibian species may potentially occur within the <br />general permit area based on potential habitat (CDOW, 1996). These species include <br />Woodhouse's toad, bullsnake, prairie rattlesnake, short-horned lizard, wandering garter snake, <br />and northern earless lizard. However, only Woodhouse's toad, prairie rattlesnake, sagebrush <br />1tzards, and short-horned lizards were observed within the permit area. Woodhouse's toads were <br />observed on the Lorencito Canyon road during the auditory raptor surveys. In addition, one <br />prairie rattlesnake was observed on the Chimney Canyon road during the May pellet group counts. <br />• The remaining two species were observed on the southern portions of the permit area. <br />Wildlife d'15/December 9, 1996 20 <br />