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 28, 2010

March 27 [Day 39] (Valley View site) (Bill Wilson) The day’s temperature high of 9C was not reached until 1800, rising from a low of 2C, ground winds that gusted to 50 km/h were variable until 1500 after which they were WSW to SSW and ridge winds were W moderate to strong all day. Cloud cover was mainly 50-100% altostratus and cumulus to 1500 after which the altostratus became very thin allowing sunny conditions for the first time, and observing conditions were excellent all day. The season’s earliest migrant so far was an adult Golden Eagle at 0758 and thereafter movement was fairly steady all day increasing after 1300 and peaking at 19 birds between 1600 and 1700, with the last Golden Eagle, a juvenile bird, moving north at 1831. The Bald Eagle passing at 1707 was the 300th of the season. The flight comprised 7 Bald Eagles (6a,1j), 4 adult Northern Goshawks, 1 unaged light morph Red-tailed Hawk, 2 Rough-legged Hawks (1 light, 1 dark) and 61 Golden Eagles (46a,10sa,4j,1u). Other migrants included 8 swans of unknown species, a probable California Gull and the season’s first Common Merganser [species # 47] and cismontanus Dark-eyed Junco. 14.33 hours (451.9) BAEA 7 (301), NOGO 4 (59), RTHA 1 (17), RLHA 2 (25), GOEA 61 (1748) TOTAL 75 (2175)

Mount Lorette [Day 27] (Ron Dutcher and Cliff Hansen) The temperature reached 8C from a low of 1C, ground winds were 5-10 gusting 15 km/h for most of the day, ridge winds were SW moderate to strong all day and cloud cover was 100-30% thin altostratus and altocumulus all day. Despite the excellent viewing conditions only 18 migrant Golden Eagles (15a,3u) were recorded, the first 2 at 0906 but the second 2 birds did not appear until after 1400 and the last went north at 1824. 11.75 hours (302.1) GOEA 18 (996) TOTAL 18 (1093)

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