. Brigham Young University science bulletin. Biology -- Periodicals. Mi:^^'^5«^-»i. Fig. 9. Peregrine cliff in desert of Colorado Plateau, reported by White and Lloyd (1962) (Fig. I, Table 1, site 28). Distance from the rock at point A to the eyrie ledge at point B is 70 ft ( m). Poplar trees (Popidus fremotitii), along a water course in foreground (C) are 40-50 ft ( m) in height. Photo by J. B. Piatt, May 1971. and Nelson on 24 October, 10 November, and 4 December 1941 (Woodbury et al., unpubl. ms), indicating that the species winters at other marshes as well as at those near th


. Brigham Young University science bulletin. Biology -- Periodicals. Mi:^^'^5«^-»i. Fig. 9. Peregrine cliff in desert of Colorado Plateau, reported by White and Lloyd (1962) (Fig. I, Table 1, site 28). Distance from the rock at point A to the eyrie ledge at point B is 70 ft ( m). Poplar trees (Popidus fremotitii), along a water course in foreground (C) are 40-50 ft ( m) in height. Photo by J. B. Piatt, May 1971. and Nelson on 24 October, 10 November, and 4 December 1941 (Woodbury et al., unpubl. ms), indicating that the species winters at other marshes as well as at those near the Great Salt Lake. Members of arctic populations (F. p. tundrius) apparently utilize Utah's marshes both as stopping places during migration and, spar- ingly, as wintering grounds. This is suggested by Lincoln's (1933) report of a peregrine banded as a juvenile at King's Point, Yukon Territory, within the geographic range of tundrius on 30 July 1924; by its recovery at Duchesne, Du- chesne Countv', Utah, on 20 February 1925; and by the collection in December of the pre- viously mentioned specimen of tundrius from Famiington Bay. Late summer sightings, which could repre- sent either resident birds or early migrants, have been recorded from several other areas. Twomey (1942) reported peregrines at Hill Creek, 40 miles ( km) south of Ouray, Uintah Coun- ty, on 5 August [1935?], at Strawberr)' Reser- voir, Wasatch County, on 17 August [1935?], and Bchle (1960) recorded the species at Glen Can- von near Wahweep Creek, Mile 17, on 6 August 1958 and at 10,500 feet (3,200 m) on the north slope of Mt. Ellen, Henry Mountains, on 8 September 1957. Finally, a subadult was seen near Park City, Wasatch County, in late August 1959 (M. Nelson and F. Welch, pers. comm.).. 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


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