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 21, 2010

March 21 [Day 33] (Valley View site) It was a high wind day with ground winds W-SW gusting 30-50 km/h for most of the day, and ridge winds strong W except between 1300 and 1530 when they eased slightly to moderate to strong. The temperature reached a high of 9.5C at 1500 from a morning low of 5C and fell to 4C at 1900. Cloud cover was 100% for much of the day, mainly altostratus and cumulus which provided an excellent backdrop against which to find high-flying birds which most of today’s migrants were. The day started promisingly enough with 6 Golden Eagles moving between 0821 and 0839, but by noon only 11 more migrants had been counted. The pace of migration increased in the afternoon, however, peaking at 22 birds between 1300 and 1400, but decreased again after 1400 before finishing with a bit of a flourish with 15 birds passing between 1800 and 1854 when the last Golden Eagle went north. Both the combined species total of 88 and Golden Eagle total of 77 (76a,1sa) are well below average for this time of year, especially considering today’s apparently favourable migratory conditions. Other migrants were 7 Bald Eagles (6a,1 late sa), 2 adult Northern Goshawks and 2 light morph Rough-legged Hawks. 12.25 hours (37.5) BAEA 7 (249), NOGO 2 (29), RLHA 2 (17), GOEA 77 (1219) TOTAL 88 (1562)

Mount Lorette [Day 21] (Bill Wilson) The temperature reached 10C from a low of 2C and fell to 1C at the end of the count. Ground winds were SW-WSW 5-20 gusting 30+ km/h throughout the day, and ridge winds were WSW moderate to strong in the morning becoming moderate after noon. Cloud cover was initially 100% diminishing to a low of 30% and increasing again to 90% by the end of the day. The only migrant raptor was Golden Eagle with 95 (89a,1sa,3j,2u) birds moving, usually high towards the NW and often rising above cumulus cloud developed along the Fisher Range. The total is the 3rd highest Golden Eagle count of the season at the site so far this season. 12.67 hours (231.2) GOEA 95 (725) TOTAL 95 (796)

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