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.

Friday, March 19, 2010

March 19 [Day 31] (Valley View site) It was initially a pleasant morning with a temperature of -7C at 0800, light WSW winds and with all ridges clear. Snow, however, started to fall at 0820 and low cloud obscured all the ridges until the snow stopped at 1320. Subsequently cumulus cloud that diminished from 70 to 20% generally gave excellent viewing conditions, and mainly sunny skies allowed the temperature to rise to 2C between 1400 and 1630. Ground winds were light SW-WSW all day and ridge winds were light only becoming light to moderate late in the afternoon. Because of the snow, the first migrant Golden Eagle did not appear until 1337, but movement quickly became strong peaking at 26 birds between 1400 and 1500 and 34 between 1500 and 1600, with the last 2 Bald Eagles soaring high before gliding to the north at 1910. Because of the light winds birds often soared for fairly long periods and moved relatively slowly and often below the ridge-lines. The total of 18 Bald Eagles (13a,1sa,4j) equaled the previous high count for this season, and the combined species total of 112 is the second highest for the season so far. The total of 92 Golden Eagles comprised 82 adults, 7 subadults and 3 juveniles, which is the highest percentage of immature birds recorded so far, and the bird recorded at 1532 was the 1000th migrant Golden Eagle of the season. There was no apparent non-raptor movement, but there seemed to have been an influx of American Robins overnight with 35 recorded around the site. 12 hours (353) BAEA 18 (323), NOGO 2 (26), GOEA 92 (1044) TOTAL 112 (1329)

Mount Lorette [Day 19] (Brian McBride) Weather conditions were somewhat better here with the temperature reaching 4C from a low of -8C, the snow ceasing at 0900 and the subsequent valley fog dissipating after1000. All ridges were obscured to 0900 then the Fisher Range cleared to 50% by noon and was clear in the afternoon. Ground winds were light N in the morning, becoming W gusting to 15-20 km/h in the afternoon, and ridge winds were NW light in the morning and moderate to strong in the afternoon. Cloud cover was 100% stratocumulus in the morning thinning to 40% cumulus at 1200, diminishing to 0% after 1500 with some thin cirrus moving in late in the day. Despite the apparently good migration and observing conditions in the afternoon, only a disappointing total of 20 birds were recorded between 1213 and 1904, the flight comprising 1 adult Bald Eagle, 18 Golden Eagles (13a,3sa,2u) and 1 unidentified eagle that soared high into a cloud. 11.58 hours (207.3) BAEA 1 (41), GOEA 18 (615), UE 1 (6) TOTAL 20 (684)

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