[NatureNS] Nocturnal Migration for the Week of August 17-23, 2015

From: "John Kearney" <john.kearney@ns.sympatico.ca>
To: <naturens@chebucto.ns.ca>
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Date: Tue, 25 Aug 2015 11:41:46 -0300
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Hi All,
Nocturnal migration at Carleton, Yarmouth County, was steady and slightly
down from last week with a call count of 759, down from 890. Warblers
accounted for 96% of the calls while the remaining 4% were thrush calls
(Swainson's Thrushes and one Veery). A total of 20 species of warblers were
recorded. American Redstarts again overwhelmed the counts with 221 calls and
an estimated minimum number of 132 individual birds. Ovenbird overtook
Magnolia Warbler in second place with 98 and 57 calls respectively.
Black-and-White and Chestnut-sided Warblers continued in good numbers.
Yellow Warblers already showed signs of declining numbers while Common
Yellowthroats began to increase. Cape May Warblers put in a better showing
this week while Black-throated Blue Warblers continued stronger than in
previous years. Less common or rare warblers included one Prairie Warbler
and a possible Prothonotary Warbler. For those who are interested, the
possible Prothonotary Warbler can be heard and its spectrogram viewed at:
https://www.youtube.com/watch?v=46DDNqFv72c. A formatted version of this
report and all the reports for this season at Carleton can be viewed at:
http://www.johnfkearney.com/Carleton_YarmouthCounty_2015.html. A table
summarizing this week's nocturnal migration follows.

Total Calls followed by Estimated Minimum Number of Individuals
American Redstart
221
132
Ovenbird
98
69
Magnolia Warbler
69
52
Unidentified Warbler
57
53
Black-and-White Warbler
50
35
Chestnut-sided Warbler
43
33
Unidentified Warbler Genus Setophaga
37
34
Common Yellowthroat
32
23
Northern Parula
32
21
Swainson's Thrush
26
14
Cape May Warbler
19
9
Yellow Warbler
18
13
Black-throated Blue Warbler
12
8
Northern Waterthrush
12
9
Canada Warbler
7
7
Blackpoll Warbler
5
5
Blackburnian Warbler
4
4
Black-throated Green Warbler
4
4
Unidentified Warbler Genus Oreothlypis
4
2
Bay-breasted Warbler
3
3
Nashville Warbler
1
1
Prothonotary Warbler
1
1
Prairie Warbler
1
1
Savannah Sparrow
1
1
Tennessee Warbler
1
1
Veery
1
1
Total
759
536



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