. Brigham Young University science bulletin. Biology -- Periodicals. Fig. 2. Land Rock, west side of Utah Lake; location of first known peregrine eyrie site in Utah. It is a marginal site, which in some recent years has been occupied by Prairie Falcons. Note scrubby nature of vegetation in foreground. Photo by Kim Despain, 197L operations have destroyed the Pehcan Point site (Fig. 6) and Prairie Falcons have occasionally occupied the Land Rock site. Nelson (1969) located 9 or 10 eyries (in letter, 25 April 1969, Nelson gave 9 eyrie loca- tions) in the area surrounding the Utah and Great Salt l
. Brigham Young University science bulletin. Biology -- Periodicals. Fig. 2. Land Rock, west side of Utah Lake; location of first known peregrine eyrie site in Utah. It is a marginal site, which in some recent years has been occupied by Prairie Falcons. Note scrubby nature of vegetation in foreground. Photo by Kim Despain, 197L operations have destroyed the Pehcan Point site (Fig. 6) and Prairie Falcons have occasionally occupied the Land Rock site. Nelson (1969) located 9 or 10 eyries (in letter, 25 April 1969, Nelson gave 9 eyrie loca- tions) in the area surrounding the Utah and Great Salt lakes during the period 1939-1942. This area included parts of Box Elder, Weber, Davis, Salt Lake, Utah, and Tooele counties. Treganza (in letter, 5 January 1930; Woodbury et al., unpubl. ms) found the species breeding on the cliffs fronting the lake from Brigham to Ogden [at least four eyries overlooked the Bear River Marshes in the 18 miles from Ogden to Brigham City (Woodbury, pers. comm., in White, 1969b)]. Although he located nests, he was unable to negotiate the cliffs; one was over 1,000 feet (305 m) high (Fig. 7). Females were col- lected off the nests, but precise nesting data were not obtained. Gunther and Nelson (Woodbury et al., un- publ. ms) noted the species nesting at a site in the Great Basin Desert of west central Utah during the nesting season (vear not given). Gun- ther (Woodbury et al., unpubl. ms) saw the species at a large reservoir in Wasatch County in the summer of Fig. 3. Utah Lake and adjacent habitat as presently seen from atop the Land Rock eyrie site; marshes former- ly were more extensive than today and came closer to the eyrie. Photo by Kim Despain, 197L. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Brigham Young University. Provo, Utah : Brigham Young University
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