This is another graph from Mike's honors thesis showing difference in thrush
calls detected at three close recording stations on an October night here in
Maine.
Jeff Wells
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Hi Jeff Wells, Jeff Bouler and John Kearny,
Thank you for sharing your data and publications!
Of course we are scratching the surface while recording. John for example you
lumped all warblers into one group. But according to small data points I have
(just started last year in early September
Hello all,
One of my students, Kyle Horton, collected acoustic data of migrants in
Lewes, Delaware and compared it to radar and thermal imaging data of
traffic rates. We found moderate correlations across nights during the
later part of the night when calling rates peaked at our site. See the
Hi John,
That's great information.
I don't hear many nocturnal non-thrush calls compared to you listeners in
the East but the ones I do hear are usually in the first several hours
after dusk up to about 2 am ish.
Meena brought up an interesting point regarding the possibility that call
spikes
Hi All,
I believe some of the variability can be accounted for by the species or
family composition of the flight calls you are recording. Below is a graph
of the distribution of flight calls by family for last autumn at an inland,
forested site in Nova Scotia.
Interesting thread!
John
Sorry all, it appears I was mistake in my earlier statement. I made an
excel chart of calls for three nights this week which I have attached
below. As you can see, the peak seems to be around 22:00 on all three
nights. However, I only listen live until 23:00, and use automatic
detectors for the
Be lovely to see that correlated with weather patterns, or across geographic
scales. Be fun, of course, to correlate with the radar imagery as well.
-Original Message-
From: bounce-120756676-10103...@list.cornell.edu
[mailto:bounce-120756676-10103...@list.cornell.edu] On Behalf Of
Another undergraduate at the time from Bates College named Mike Watson did some
work for his honors thesis using data from three of my recording units run
simultaneously here in Maine all within a few miles of each other.
Attached is one figure showing the nightly variation over three October
Hi Jeff and all,
Thanks for your feed back. It is getting more interesting! I just looked at
the data of Sep 21 2015 when I recorded over thousand calls. As Jeff mentioned
it peaked around 2 am.
As for Swainsons Thrushes, I have been recording very few calls or no calls at
all, when some
All,
Out here in southwestern Washington State, I have a steady flow of very
vocal Swainson's Thrushes flying over every night. Like others on this
list serve, I've noted that the number of calls increasing dramatically
about an hour or so before dawn. I've often wondered if they are calling
Recording in central Michigan, my calls were peaking at about 4:00 AM-right
by the shores of Lake Huron. My guess is that is when they are flying low
and looking to land. I'd have to look at my old data, but I think my inland
recorders (not near woodlots) did not see the same peak. Fall and
Hi all,
I have been recording in Ithaca NY for last few days. I am finding an
interesting pattern in number of calls recorded per hour (between 9.00 pm to
5.30 am). My recordings of the calls peak around 3.00 am in the morning. So I
am not sure why that pattern. Whether that is the time when
Hi Preston and all,
I downloaded the calls you sent. The first one is a “double-up” warbler mostly
likely one in the genus Oreothlypis (Nashville, Tennessee, and Orange-crowned).
I would lean toward Tennessee for this one due to the nice bend in the
spectrogram. When I first looked at the
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