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.

Monday, March 22, 2010

March 22 [Day 34] (Valley View site) It was a strange day’s weather with light snow falling and the ridges partially obscured to 0930 after which the ridges quickly cleared and 100% stratocumulus cloud gave way to 60-80% cumulus and cirrus. Ground winds were mainly SW gusting to 30 km/h and ridge winds were moderate WNW until 1440 when they switched to the east and cloud progressively obscured the ridges again with snow starting to fall after 1445. The temperature briefly reached a high of 9.5C at 1400 from a morning low of 1C, but then rapidly dropped and was only 1.5C at 1700, and I gave up on the day at 1730. Golden Eagles started to move soon after the ridges cleared with the first 2 going north at 1046 and by noon 11 birds had migrated raising hopes for at least a reasonable count. Afternoon movement however proved to be slow and sporadic and the only bird seen after 1500 was the season’s first Red-tailed Hawk [species #44], a light morph adult calurus that occurred 3 days later than the average date of the last 2 years. The final count was only 24 birds, comprising 2 adult Bald Eagles, 1 adult Northern Goshawk, 1 Red-tailed Hawk and 20 Golden Eagles (19a,1sa). The resident pair of Golden Eagles was quite conspicuous for much of the day, with the male displaying at times, and at 1423 copulation was observed as the birds perched on a pinnacle high on the Livingstone Ridge. A male Mountain Bluebird [#42] at 0811 was a first for the season, as was an American Crow [#43] at 0916. 10.25 hours (387.7) BAEA 2 (251), NOGO 1 (30), RTHA 1 (1), GOEA 20 (1239) TOTAL 24 (1550)

Mount Lorette [Day 22] (George Halmazna) The day was characterised by repeated snow flurries moving from the west, during which winds gusted up to 30 km/h and the temperature was reduced by up to 3C. Between flurries ground winds were generally light NW as were ridge winds except during flurries when they were moderate. The temperature ranged from -3C to a high of 7C at 1600, and cloud cover between flurries was 50-90% cumulus giving excellent viewing conditions. The first migrant raptor was the day’s only Northern Goshawk at 1019, but the first of the day’s 44 adult Golden Eagles did not appear until 1244 and the last moved at 1707. Eagle movement was very sporadic, however, with 18 birds moving 1200-1300 and again between 1400 and 1500 and only 8 more outside those two hours. 12.5 hours (243.7) NOGO 1 (12), GOEA 44 (769) TOTAL 45 (841)

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