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Hi All, This week had the highest volume of night flight calls for this season. There was a strong migration of warblers throughout the week. The most common was Magnolia Warbler with strong flights of Common Yellowthroat, Ovenbirds, Northern Parula, Blackpoll Warblers, and Black-throated Green Warblers. The most common bird, however, was Swainson's Thrush with 284 night flight calls compared to 121 flight calls for the most common warbler, Magnolia. There was one Gray-cheeked Thrush, along with a few Veeries and Hermit Thrushes. The sparrows were still sparse, as expected, but with an increase of Savannah Sparrows over previous weeks. A total of 1,231 night flight calls were recorded during this seven-day period. Due to a fairly strong southerly flow on the night of September 2-3, a number of rare birds were detected this week. The best of these was a Henslow's Sparrow. It has a distinctive night flight call and can be identified with a fairly high degree of certainty. Also recorded were Wood Thrush and Prairie Warbler. These also have distinct night flight calls. Two other rare warbler species were recorded: Prothonotary Warbler and 2 Golden-winged/Blue-winged Warblers. The flight calls of these two species are more difficult to identify with certainty but are included in these week's lists since both the sound of the calls and their spectrograms fit the traits associated with these species. A summary of the week's flight calls and wing sounds are summarized below. Species: Calls Swainson's Thrush 284 Magnolia Warbler 121 Common Yellowthroat 72 Unidentified warbler of Genus Setophaga 72 Ovenbird 71 Blackpoll Warbler 68 Northern Parula 66 Unidentified warbler 66 Black-throated Green Warbler 54 Savannah Sparrow 46 Yellow-rumped Warbler 38 American Restart 36 Unidentified duck 32 Bay-breasted Warbler 25 Black-and-White Warbler 23 Chestnut-sided Warbler 18 Nashville Warbler 17 Blackburnian Warbler 12 Palm Warbler 12 Veery 11 Mourning Warbler 10 Canada Warbler 8 Golden-crowned Kinglet 8 Unidentified warbler of Genus Oreothlypis 8 Unidentified songbird 7 Cape May Warbler 6 Northern Waterthrush 6 White-throated Sparrow 5 Black-throated Blue Warbler 3 Hermit Thrush 3 Song Sparrow 3 Tennessee Warbler 3 Wilson's Warbler 3 Golden-winged/Blue-winged Warbler 2 Lincoln's/Swamp Sparrow 2 Rose-breasted Grosbeak 2 Unidentified Sparrow 1 Gray-cheeked Thrush 1 Henslow's Sparrow 1 Prairie Warbler 1 Prothonotary Warbler 1 Unknown species 1 Wood Thrush 1 Yellow Warbler 1 Total 1,231
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