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'-` Threatened, Endangered, and Sertsilive Species Report <br />' Unoccupied stick nests and trees that provide cavity nest opportunities were also identified at <br />specific locations within the survey area. No nesting birds were observed, due to the time of <br />year that this survey was completed. The following nests/cavities were identified and may <br />°~° require further study to determine if USFS sensitive species may utilize them: <br />n;. <br />E;~, • A cavity in a ponderosa pine snag was identified in the SE1/4, SWl/4, Section 22. The <br />~::: <br />~'"' cavity was approximately six inches in diameter and was approximately five feet above ground. <br />This snag was the only ponderosa pine observed in the azea and may provide cavity nesting <br />~`~' habitat for USFS sensitive species (i.e., flammulated owl, northem three-toed woodpecker). <br />I'?., <br />• A stick nest was identified near the top of an aspen tree along a drainage bottom neaz the <br />~r; boundary between sections 22 and 27. This nest is located approximately 40 feet above ground, <br />1~' is medium-sized (approximately 18 inches in diameter), and is situated in the trunk of the tree. <br />This nest is unlikely to be used by northern goshawks because of its small size. The only other <br />potential USFS sensitive species that might use this nest is the merlin, which is uncommon in <br />this area. <br />• Two stick nests were identified at the upper (southern) end of Box Canyon in the SW1/4 of <br />Section 14 (Figure 3). The two nests aze located approximately 25 yards apart and are sepazated <br />by an existing trail that appears to be a reclaimed access road. Both nests aze situated in mature <br />aspen trees approximately 50 feet above ground. The southernmost nest is the smaller of the <br />two, with an estimated diameter of approximately 18 to 24 inches. The northem nest is larger, <br />approximately 30 to 36 inches in diameter (Appendix B -Photo 4). The northem nest may be <br />large enough to have been constmcted and used by a northem goshawk, although goshawk nests <br />aze typically 36 to 48 inches in diameter (Harrison 1975). The smaller nest is not large enough <br />to be used by a northern goshawk, but may be used by a different accipiter species such as a <br />Cooper's hawk, which is not a USFS sensitive species. It is also possible that both nests were <br />constructed by the same accipiter and that one nest was abandoned in favor of the other. <br />~~c~, 7FSSurveyl8tlvu24-RPT(210)Rev4/Ocbber 3I, 2001 4 <br />R;ci <br />