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Hi All,
Nocturnal migration at Carleton, Yarmouth County, was moderate to strong on
about half the nights in this ten-day period. There was a large flight the
night of 27-28 August with 300 calls recorded. Overall for the week, there
was a total 934 calls at a rate of 93 per night and an estimated minimum of
763 birds. With the beginnings of the Swainson's Thrush migration this week,
the percentage of warbler calls fell to 90% of the total. The most common
species were American Redstart (148 calls), Common Yellowthroat (92),
Northern Parula (84), Black-and-White Warbler (69), Magnolia Warbler (65),
and Swainson's Thrush (53). There were some good nights for Northern
Waterthrush, Black-throated Blue Warbler, and Cape May Warbler. The rare
bird for the week was a possible Yellow-throated Warbler. Its call is very
similar to Northern Parula but an analysis of its spectrogram better fit the
parameters for a Yellow-throated Warbler.
There was a good correlation of the birds recorded at Carleton and the
number of (bird) echoes on the weather radar at Caribou, Maine. This was
especially true on the night of 27-28 August when the Caribou radar showed a
density of 227 (bird) echoes per cubic kilometer. Graphic representations of
Carleton call counts and correlations with the Caribou radar can be found on
my website (http://www.johnfkearney.com/Carleton_YarmouthCounty_2016.html)
and a summary table for the week is below.
John
Estimated
Total
Minimum
Species
Calls
Individuals*
American Redstart
148
114
Common Yellowthroat
92
78
Northern Parula
84
68
Black-and-White Warbler
69
59
Magnolia Warbler
65
53
Unidentified Warbler
62
59
Swainson's Thrush
53
31
Ovenbird
46
40
Northern Waterthrush
45
31
Black-throated Blue Warbler
31
25
Black-throated Green Warbler
30
28
Unidentified Warbler Genus Setophaga
28
25
Yellow Warbler
27
25
Cape May Warbler
23
20
Chestnut-sided Warbler
20
16
Wilson's Warbler
16
14
Blackburnian Warbler
14
12
Bay-breasted Warbler
10
7
Blackpoll Warbler
8
8
Nashville Warbler
8
6
Yellow-rumped Warbler
7
6
Palm Warbler
6
4
Canada Warbler
5
5
Rose-breasted Grosbeak
4
2
Unidentified Songbird
3
3
Prairie Warbler
3
3
Tennessee Warbler
3
1
White-throated Sparrow
3
3
Yellow-throated Warbler
3
1
Black-capped Chickadee
2
2
Unidentified Sparrow
2
2
Lincoln's/Swamp Sparrow
2
2
Unidentified Warbler Genus Oreothlypis
2
2
Spotted Sandpiper
2
1
Veery
2
1
Bobolink
1
1
Unidentified Thrush
1
1
Hermit Thrush
1
1
Mourning Warbler
1
1
Savannah Sparrow
1
1
Song Sparrow
1
1
Total
934
763
* Calls that are more than one minute apart plus calls that are less than
one minute apart divided by three and rounded up to nearest whole number
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vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;line-height:106%;font-family:"Book =
Antiqua",serif'>Hi All,<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;line-height:106%;font-family:"Book =
Antiqua",serif'>Nocturnal migration at Carleton, Yarmouth County, was =
moderate to strong on about half the nights in this ten-day period. =
There was a large flight the night of 27-28 August with 300 calls =
recorded. Overall for the week, there was a total 934 calls at a rate of =
93 per night and an estimated minimum of 763 birds. With the beginnings =
of the Swainson’s Thrush migration this week, the percentage of =
warbler calls fell to 90% of the total. The most common species were =
American Redstart (148 calls), Common Yellowthroat (92), Northern Parula =
(84), Black-and-White Warbler (69), Magnolia Warbler (65), and =
Swainson’s Thrush (53). There were some good nights for Northern =
Waterthrush, Black-throated Blue Warbler, and Cape May Warbler. The rare =
bird for the week was a possible Yellow-throated Warbler. Its call is =
very similar to Northern Parula but an analysis of its spectrogram =
better fit the parameters for a Yellow-throated =
Warbler.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;line-height:106%;font-family:"Book =
Antiqua",serif'>There was a good correlation of the birds recorded at =
Carleton and the number of (bird) echoes on the weather radar at =
Caribou, Maine. This was especially true on the night of 27-28 August =
when the Caribou radar showed a density of 227 (bird) echoes per cubic =
kilometer. Graphic representations of Carleton call counts and =
correlations with the Caribou radar can be found on my website (<a =
href=3D"http://www.johnfkearney.com/Carleton_YarmouthCounty_2016.html">ht=
tp://www.johnfkearney.com/Carleton_YarmouthCounty_2016.html</a>) and a =
summary table fo