March 12 [Day 24] (Valley View site) (Dawn Hall after 1500) It was a warm day with the temperature rising to 11C at 1300 from a low of 3C, ground winds were mainly SW steadily increasing in velocity peaking at 25-30 gusting 35 km/h at 1500 after which they diminished to light by 1800, and ridge winds were moderate and occasionally strong WSW all day. Cloud cover varied between 60 and 100% cumulus, altostratus and cirrus giving good observing conditions all day. Raptor movement started relatively late with the first adult Golden Eagle going north at 0830, and after 1000 migration was steady until the last bird, a juvenile Bald Eagle, disappeared to the north at 1754. Maximum movement was 24 birds (1 Bald Eagle and 23 Golden Eagle) between1600 and 1700, and the flight comprised 12 Bald Eagles (11a,1j), 3 adult Northern Goshawks and 85 adult Golden Eagles. At 1027 the two resident Golden Eagles soared together over Morin Peak before descending to a pinnacle where they were observed copulating for the first time this season. At 0800 a Common Raven gave a very credible imitation of a Golden Eagle display flight over the part of the ridge where eagles often display, but being a raven it could not resisted embellishing the downward sweep of the flight with spiraling twists. An American Three-toed Woodpecker [#34] and a calling Spruce Grouse [#35] were both new for the season, and the only non-raptor migrants were a flock of 7 Canada Geese flying high towards the east over the Livingstone Ridge. 11.58 hours (268.6) BAEA 12 (166), NOGO 3 (20), GOEA 85 (506) TOTAL 100 (711)
Mount Lorette [Day 12] (George Halmazna) The temperature only ranged between -1C and 4C. All ridges were obscured by snow until 0900 after which the Fisher Range cleared to 30% obscured, but when at 1200 rain obscured the ridges for the rest of the day the observers decided to move to the Lusk Creek site. Only 2 migrant Golden Eagles had been seen at Lorette but a season-high127 were counted at Lusk Creek with 56 occurring between 1600 and 1700. The birds had almost certainly been deflected to the east by the weather, and the Golden Eagle total of 129 is the highest daily count at either site so far this season. BAEA 2 (24), NOGO 1 (10), RLHA 1 (6), GOEA 129 (267) TOTAL 133 (314)
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.
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