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, April 11, 2010

April 11 [Day 54] (Valley View site) (Denise Cocciolone-Amatto 1100-1300) A phone call in the morning established that the previous day’s forecast was hopelessly wrong and that the ridges were in fact clear and it was sunny. Denise managed to get to the site at 1100 and I drove the 200 km from Calgary and arrived at 1300. The temperature at 1100 was -2C and rose to 3.5C between 1400 and 1500, falling to 1C at 1800, ground winds were variable SE to SW gusting to 22 km/h and ridge winds were moderate SSW to 1400 after which they switched to light to moderate upslope (SE-E). There were a few very light snow flurries in the afternoon, but steady light snow started at 1830 and become moderate at 1840 which obscured all the ridges: the long- forecast snow had finally arrived! Despite numerous sightings of resident Northern Goshawks, Red-tailed Hawks (3 pairs), Golden Eagles and Prairie Falcons, and apparently fairly reasonable weather conditions, not one migrant raptor was recorded! 7.67 hours (625.5) No migrant raptors (2542)

Mount Lorette [Day 42] (Bill Wilson) The temperature was -12C at 0645 and rose to highs of 2C at 1400 and again at 1630 before falling to -2C at 2030. Ground winds varied between SW and ESE 0-10 occasionally gusting 20 km/h, ridge winds were light SW becoming S after 1700, and cloud cover was altostratus with minor cumulus in the morning and early afternoon, changing to altostratus then stratus with minor cumulus that produced snow flurries late in the day. There was a fairly steady movement of raptors between 1026 and 1956, probably reflecting yesterday’s afternoon movement at P-SL, with most of the birds moving across the western peaks until 1600 when the movement switched to the Fisher Range to the east. The flight comprised 3 Bald Eagles (2j,1u), a season high 5 Red-tailed Hawks (4 adult calurus (3 light, 1 dark) and 1 undifferentiated dark morph bird), 1 light Rough-legged Hawk, 21 Golden Eagles (8a,4sa,6j,3u) and 1 unidentified eagle. 13.75 hours (475.5) BAEA 3 (85), RTHA 5 (12), RLHA 1 (7), GOEA 21 (1153), UE 1 (12) TOTAL 31 (1299)

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