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.

Thursday, March 11, 2010

March 11 [Day 23] (Valley View site) Ridge winds were strong W all day and ground winds were N-SW gusting on occasion to 60 km/h making the temperature, that ranged from -3C to 4C, feel much colder. Cloud cover was 30-100% altostratus, altocumulus, cumulus and cirrus providing an excellent backdrop for birds that moved north at considerable height during the early afternoon. The first migrant raptor was a Golden Eagle at 0718 and by 0813 a further 8 Golden Eagles and a Prairie Falcon had moved north. The pace of migration then slowed somewhat until 1300 after which it increased again peaking at 20 birds between 1500 and 1600, but unlike yesterday there was no late movement and the last bird, a Bald Eagle, moved north at1801. All 9 Bald Eagles were adults, and the 84 Golden Eagles comprised 83 adults and 1 subadult. The only songbird movement was 43 Bohemian Waxwings flying high to the north in 2 flocks. 11.58 hours (257.1) BAEA 9 (154), NOGO 1 (17), GOEA 84 (421), PRFA 1 (3) TOTAL 95 (611)

Mount Lorette [Day 11] (Joel Duncan) Weather conditions were similar with the temperature rising to 4C from a low at 0900 of -2C, ground winds were SW 20-30 gusting 60 km/h and ridge winds were strong W-SW all day. Cloud cover was a mixture of altostratus, cumulus and cirrus thinning to 10% at 1500 but rapidly thickened to 100% stratocumulus at 1700 bringing snow and obscuring the eastern ridges which had hitherto been clear. Unlike Piitaistakis, however, raptor movement was thin with the first migrant not seen until 1328 and when the last Golden Eagle went north at 1701 only 7 birds had been tallied: 1 adult Bald Eagle, 2 light morph Rough-legged Hawks and 4 Golden Eagles (2a,1j,1u). An impaled headless chickadee showed that the Northern Shrike is still active around the Hay Meadow. 9 hours (118.8) BAEA 1 (22), RLHA 2 (5), GOEA 4 (138) TOTAL 7 (181)

1 comment:

Unknown said...

I have been observing the local golden eagles here on southern vancouver island for 6 years now. I Have found 4 tree nests, 3 of them belonging to one pair. The other day I saw the most goea I have ever seen in one day, possibly 9 individuals. 8 birds appeared to be paired off as they circled and soared. Now, your migrating eagles, do they migrate in pairs usually or do they meet up on their territory ?
I still have a little trouble IDing them when they are just silouettes a mile or more away. what are your field marks for goea that are very distant? You seem to have 100% ID's for your eagles, there must be a very recognizable field observation that you use, no?

thanks
robin robinson
Victoria bc

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