Monday, September 27, 2010

September 25 [Day 6] (Jim Davis) Winds were again SW strong all day at ridge level and even gusting to 60 km/h on the valley floor. The temperature was 13C at 0700 and rose to 24C at 1300 and was still 18C at 1830, cloud cover was cirrostratus with minor cumulus to 1400, after which 5-30% altostratus formed an arch over the Fisher Range. Again migrant eagles moved from Heart Mountain to the south behind the Fisher range, and most were very high. A total of 26 migrants moved between 0840 and 1854 with a peak of 8 birds between 1200 and 1300: Bald Eagle 3 adults, 8 un-aged Sharp-shinned Hawks, 1 adult Northern Goshawk, 1 unidentified small Accipiter, 1 juvenile light calurus Red-tailed Hawk, 11 Golden Eagles (6a, 1j, 4u) and the season’s first Prairie Falcon. The warm weather produced a season high total of 49 visitors to the site who were of assistance in locating high-flying birds. There were also good numbers of non-raptors at the site including 43 Yellow-rumped Warblers, 1 Townsend’s Warbler, 65 Pine Siskins and a season first Common Redpoll, but the highlight was a single Black Swift seen on three occasions. It is interesting to note that when we visited the site after a pre-migration workshop on the afternoon of September 12 Black Swifts were feeding above the Kananaskis River all the time that we were there (2.33 hours), the highest count at one time being 37 birds which was probably the biggest single flock of the species ever recorded in Alberta. 12.5 hours (61.09) BAEA 3 (8), SSHA 8 (18), NOGO 1 (2), UA 1 (1), RTHA 1 (7), GOEA 11 (134) PRFA 1 (1) TOTAL 26 (175)

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