Tuesday, October 11, 2011

October 10 [Day 18] (George Halmazna, assisted by Chris Hunt and 2 sky sweepers) The temperature rose to a high of 15C from a morning low of -3C and was 8C at the end of the day. Ground winds were calm to light to 1200, were variable E, SE and S in mid afternoon gusting to 20 km/h at 1500 before becoming calm again at the end of the day. Ridge winds were SW-SSW all day light to moderate to 1500 after which gusts increased to 50-68 km/h. Cloud cover was 40-60% altostratus and cirrus, with cumulus developing after 1400, giving sunny periods, and the western ridges were up to 30% obscured by flurries after 1400. Raptor migration persisted for 11.92 hours with the first Golden Eagle appearing at 0737 and the last 2 Golden Eagles moving south at 1852. Peak passage was 108 raptors between 1200 and 1300 that included 104 Golden Eagles, and there was movement every hour except after 1900. The day's count was again dominated by Golden Eagles with 342 being the second highest total of the season so far (268a, 2sa,72j). Season high counts were achieved for Bald Eagle (6: 5a,1j), Sharp-shinned Hawk (10: 2a,1j,7u) and Rough-legged Hawk (10), while 1 adult Cooper's Hawk and 2 adult Northern Goshawks completed the day's total of 370 birds. Other birds seen included 3 Common Loons flying high to the SW together, 100 American Robins, the first 32 Bohemian Waxwings of the season, 90 Grey-crowned Rosy-Finches, 223 White-winged Crossbills and 525 Pine Siskins.

12.08 hours (222.48) BAEA 6 (33), SSHA 10 (65), COHA 1 (17), NOGO 2 (17), RLHA 10 (11), GOEA 342 (1416) TOTAL 370 (1416)

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