The Piitaistakis (South Livingstone Ridge)and Mt. Lorette Raptor Counts for the spring migration of 2010 are underway. Follow the daily movement of raptors in these field notes by Research Director Peter Sherrington and his citizen scientist colleagues.

Sunday, March 14, 2010

March 14 [Day 26] (Valley View site) (Denise Cocciolone-Amatto to 1500) Change to Mountain Daylight Time (one hour forward), all previous times were given in Mountain Standard Time. It was -5C at 0800, but rose to 7C at 1400 and was still 4C at 1900. Ground winds were very variable, calm or light to noon then gusting to 20 km/h in the afternoon, and ridge winds were SW light becoming moderate in the afternoon. It was cloudless in the morning after which between 30 and 100% cirrus and cirrostratus cloud developed giving mainly excellent observing conditions. Raptor movement was slow to 1400 with the first Golden Eagle not appearing until 1028, but subsequently the pace became fairly steady with only one hour (1700-1800) reaching 10 birds and the last Golden Eagle went north at 1910. The flight was dominated by Golden Eagles (48a,1sa) and only 4 Bald Eagles (2a,1sa,1j) were seen. The highlight, however, was the season’s first Ferruginous Hawk, an adult light morph bird, that went north at 1742 that was the earliest ever seen at the site by 5 days. The only passerine migrants were a flock of 26 Bohemian Waxwings, and a Townsend’s Solitaire was only the second record of the season. At 1645 a probable California Gull [#37] soared high over the Livingstone Ridge furnishing a first March record for the site. 12.08 hours (292.7) BAEA 4 (182), UA 1 (1), FEHA 1 (1), GOEA 49 (639), PRFA 1 (5) TOTAL 56 (864)

Mount Lorette [Day 14] (Bill Wilson) It was a cooler day at Lorette where the temperature at 0715 was -12C, but it rose to 6C at 1400 before falling at the end of the day to -3C. Ground winds were SW 5-10 gusting 15-20 km/h, ridge winds were moderate W, and it was cloudless to noon with 30-90% cirrus clod developing in the afternoon reaching 100% late in the day. Movement was very slow in the morning with the first of the day’s 78 Golden Eagles appearing at 0846, but it quickened in the afternoon peaking at 24 (2 Bald Eagles and 22 Golden Eagles) between 1300 and 1400. All migrants were eagles, that also included 8 Bald Eagles (6a,2sa) 12.5 hours (152.5) BAEA 8 (32), GOEA 78 (360), UE 1 (5) TOTAL 87 (418)

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