that out. My best
guess is this could be a flat variant of the descending “zeep” Yellow Warbler
regularly gives in fall migration (at least in eastern NA). There is no example
of the descending YEWA nfc in the original flight call guide - the 2nd ed. will
have it.
Bill Evans
From: Wim van Dam
that out. My best
guess is this could be a flat variant of the descending “zeep” Yellow Warbler
regularly gives in fall migration (at least in eastern NA). There is no example
of the descending YEWA nfc in the original flight call guide - the 2nd ed. will
have it.
Bill Evans
From: Wim van Dam
Looks like Chipping Sparrow to me, perhaps two calls from the same bird - a
clue is the 80+ ms duration, but also there is a faint initial downsweep that
is structurally more in line with CHSP.
Bill
From: Preston Lust
Sent: Wednesday, April 24, 2019 4:39 PM
To: Night Flight Call Discussions
Looks like Chipping Sparrow to me, perhaps two calls from the same bird - a
clue is the 80+ ms duration, but also there is a faint initial downsweep that
is structurally more in line with CHSP.
Bill
From: Preston Lust
Sent: Wednesday, April 24, 2019 4:39 PM
To: Night Flight Call Discussions
I’d guess a Swainson’s Thrush making non-symmetric sounds with its syrinx. The
upper track doesn’t fit well for any other species, so I don’t think it is two
birds calling coincidentally. The lower track fits well for SWTH.
Bill
From: Meena Madhav Haribal
Sent: Monday, August 13, 2018 5:12
Old Bird 21c Micros, is it possible
to have more info !?
Can the microphone record at 24 bit?
Thank you!
Great news!
Dioni Loïc Sauvé
Laval, Québec
2017-11-06 23:55 GMT-05:00 Bill Evans :
Greetings all,
I'm happy to report that the old Evans & O'Brien Flight Call C
rien and I will serve as initial editors
and the scope will expand to all species in North America.
Also wanted to let folks know that this week only I'm offering an off-season
discount on my remaining stock (3) of Old Bird 21c mics -- $250 plus shipping,
first come first serve.
Bill E
with a large
percentage of the calls we tag with an ID. It's a fascinating intellectual
quagmire.
Regarding your attached unknown, an argument could be made for American
Pipit.
Bill Evans
Danby, NY
-Original Message-
From: Hal Mitchell
Sent: Wednesday, October 04, 2017 7:39 PM
Follow-up manuscript:
Evans, W. R., M. Grosselet, and G. Ruiz Michael. An unidentified nocturnal
flight call from southern Mexico. Huitzal 18(1):131-140.
http://huitzil.net/blog/?p=1826
From: Bill Evans
Sent: Friday, September 23, 2016 11:40 AM
To: NFC- L
Subject: [nfc-l] Big Double-up
Yes, that’s a Dickcissel. Congrats!
Bill E
From: Jerald
Sent: Sunday, November 06, 2016 1:53 PM
To: nfc-l
Subject: [nfc-l] Possible Dickcissel NFC
Hello all,
Could someone with a bit more experience please confirm whether or not this is
a Dickcissel? It's getting kind of late for them, and
Thanks Chris.
There is a lot happening with night flight calls these days. Another action
that would be useful is having folks on this list with recent publications
involving night flight calls post their citations. Or, if anyone on this list
is aware of recent nfc publications by folks not on
Same large flight down the Hudson River Valley last night with 2930 warbler and
sparrow calls recorded with a 21c mic between 9pm-5am at a station in Chatham,
NY (~20 miles southeast of Albany).
Hourly record as follows:
9-1088
10-11127
11-12151
12-1 211
1-2402
of the call is
also attached. Many thanks, Bill Evans
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there was no such
delay apparent.
Bill
From: Bill Evans
Sent: Thursday, January 22, 2015 7:40 AM
To: Night Flight Call List
Subject: [nfc-l] missing first few milliseconds of spectrograms made in Raven
When I open a short night flight call wav file in Raven, the waveform window
begins at 0 sec
sound files, and perhaps wish to use such a short spectrogram in a publication.
Anyone else notice this possible bug in Raven?
Bill Evans
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Sounds like a possibility to me too – at least something in the Blue
Grosbeak/Indigo/Lazuli/Varied/Painted complex. The spectrogram indicates it is
lower in frequency than typical for Indigo, but that doesn’t rule it out.
Bill E
From: Spahr, Timothy
Sent: Friday, October 31, 2014 10:22 AM
Doyle
Sent: Saturday, October 11, 2014 7:45 AM
To: Bill Evans
Cc: NFC-L@cornell.edu
Subject: Re: [nfc-l] NFC ID Help, Maryland Eastern Shore
Hi Bill,
I inadvertently had the setting on 16 kHz, messing around with some i-mics and
recording apps, so I missed checking the default rate and figured
Tough to tell from the spectrogram Diane. It shows a ~5 ms section of a steeply
descending call. It appears a higher pitched portion above 8 kHz is chopped
off. Perhaps in the territory of flying squirrel chirps with this one. Can
you make a spectrogram showing the frequencies above 8 kHz or
Hi Andy,
The 21c is currently sold out. I’ll have 10 to offer in late March and a
tentative plan to have 30 more available by August 1st. These latter 30 mics
would be an advance group order to keep costs down -- anyone interested,
contact me by June 1. In the meantime Andy, I’m happy to send
Some patterns of songbird nocturnal migration across NY the past few weeks as
indicated by nocturnal flight calls:
http://www.oldbird.org/Data/2013/TransNE2013/NETransect-2013.html
-Bill E
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583 warbler and sparrow calls logged in west-central NY (Alfred, NY) last night
– this may be a high nightly tally for that station in spring (n= 5).
Zeep ~50%
Double-up ~10%
American Redstart ~5%
Canada Warbler ~4%
Common Yellowthroat ~3%
Chestnut-sided ~2%
Savannah Sparrow ~2%
Cape May ~1%
NFCers,
In the course of trying to win a competitive research contract sometimes one
offers an in-kind (pro bono) study to sweeten the proposal. That's the case
with the acoustic study at a NY wind energy project reported at the link below.
The data was gathered ~5 years ago but the report was
Avian night flight calling by species/species-group across northeastern US last
week:
http://www.oldbird.org/Data/TransNE/9-16Sep12/9-16Sep12.html
-Bill E
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I just crunched last night’s flight calls from my station in the Town Danby NY
- a few miles south of Ithaca. 487 warbler and sparrow flight calls from
9PM-5AM (21c/tseep-x). This is the high nightly total since this station began
in mid-August.
Getting late for Mourning Warbler but I did have
Sometimes the simple things in life get lost in all the commotion, so I thought
I’d share with you all my last 15 minutes or so:
I was classifying a batch of night flight calls extracted from nature last
night over the visitor center of the Jamestown Audubon Society in western NY.
Problems
Oops, I overlooked that the call was from May 12, which would be in the window
for a spring migrant in NY, though the call sounds doesn’t sound like it is
from a bird in flight.
Bill E
From: Bill Evans
Sent: Tuesday, August 07, 2012 9:38 AM
To: Benjamin Van Doren ; Christopher T. Tessaglia
My first impression was a scream from a girl on a swing set. I then quickly
came around to agreeing with Ben’s first impression and Chris. Pretty early for
migrant RHWO though, as based on my experience their southbound migration in NY
is the latter half of September and early October – perhaps
Dave,
Your prediction was pretty good. There were mixed results Sunday night
depending on whether one was listening to the east or west of the cold front,
and as it turned out, last night was the biggest night flight calling event of
the season across northeastern US.
Bill E
From: david
I’ve noticed via flight call monitoring at this time of year (in NY and
vicinity) that songbirds tend to move every night regardless of cold fronts --
unless there are strong southerly winds or substantial rain events. Later in
the season (mid-September – October) the flights seem more tied to
>From 1991-1994 during fall migration I had a line of 3-7 (depending on year)
>acoustic monitoring stations in an east-west transect across of NY.
>Recordings were made using VCRs in long-play mode (9 hrs) on nights with good
>migration conditions. I listened back to the tapes and catalogued
Sounds mammalish to me Chris – somewhat like a whistle pig (aka Woodchuck)
though their calls are typically a bit higher-pitched and I’ve never heard one
vocalize at night.
From: Christopher T. Tessaglia-Hymes
Sent: Friday, July 06, 2012 10:06 AM
To: NFC-L
Subject: [nfc-l] Etna, NY: Possible
Interesting call Rob, and hard to pin down as it appears to be a muttering
instead of a full announcement. I've ranged in considering Virginia or Black
Rail, Osprey, and Whimbrel. Perhaps those more freshly afield can weigh in.
Bill E
-Original Message-
From: Jay K
Sent: Saturday,
There’s a delightful old paper by Gerald Thayer describing "the mid-summer,
mid-night, mid-sky gyrations of the Black-billed Cuckoo, as noted by my father
and me for three consecutive seasons in the southwestern corner of New
Hampshire":
”Several years before we discovered the nocturnal-flight
Thanks Mike. So Red-faced does give a zeep! And it appears to have a wider
frequency span than Yellow. Perhaps the wider-frequencied series of zeeps from
Ajo around 2:29AM last night was from a Red-faced.
Bill
Nice flight across the Mexican–Arizona border region last night. It always
amazes me how late spring migrants are crossing the border in the west (and
probably the east as well). I recall camping along the border in Cabeza Prieta
NWR back in ~1997 and hearing a steady flight of Swainson’s
Wow Chris, you have a good ear! I wouldn’t have been able to call that a
species in the bunting complex simply based on the spectrogram, but I agree on
listening that is likely what it is. Based on the apparent spectrographic
frequency envelope of the call, it would be a lowish bunting type
Benjamin,
I get a few calls like your first example every year in central NY -- see two
examples on the hypothetical Yellow-bellied nfc page in the Flight Calls CD. I
concur with Michael's assessment and also keeping an open mind for Alder and
other empids. This is a tough group to make ID
Hey Mike,
There is no such CD that you refer to. Would appreciate it you could refer to
both authors or simply the Flight Call CD (at least until someone else
publishes a flight call cd).
Regarding Harris' Sparrow flight call, I suspect they would be in with your
Song Sparrows if you have
All:
This call was recorded last night at 11:40PM near Alfred, NY. Any ideas on
species?
~Bill E
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From: "Andrew Farnsworth"
To:
Cc: ; "Bill Evans"
Sent: Thursday, October 06, 2011 1:38 PM
Subject: Re: [nfc-l] American Bittern NFC
Hi all,
I've certainly heard American Bittern produce isolated notes more
often than not when I've heard them migrating at nigh
676 warbler and sparrow calls logged at the Alfred, NY station last night
(8:30PM-5:30AM).
Data up at:
http://www.oldbird.org/Data/States/NY/Alfred/fall2011/Alfred2011f.htm
A solid flight with typical species composition for the date.
Bill E
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senberg
Conservation Science Program
Cornell Lab of Ornithology
607-254-2412
607-342-4594 (cell)
k...@cornell.edu
On Sep 21, 2011, at 9:55 AM, Bill Evans wrote:
Ken appears to have tuned into one of the biggest calling night of the
season so far in central NY. The acoustic station at Alfred Stat
Ken appears to have tuned into one of the biggest calling night of the
season so far in central NY. The acoustic station at Alfred Station, NY
logged its season high number (988) of warbler and sparrow flight calls last
night between 8:30PM-5:30AM. Based on spectrographic analysis roughly 4
Andrew,
I like your investigative approach.
Right now the primary evidence suggesting the characteristics of Bicknell's
thrush flight call is still tentative and based largely on the
distinctiveness of "Gray-cheeked" type flight calls recorded in east-central
Florida during spring migration
Greetings nfcers,
Over the past 10 nights the acoustic station in Alfred Station, NY has
logged an average of 303 warbler and sparrow calls per night, with a
standard deviation of only 77. In other words, there has been a very
consistent pattern of calling each night in contrast to the more
I made a spectrogram of the call but it doesn't provide enough detail to
help ascertain the ID other than that the frequency, time between notes, and
basic time-frequency contour appear to generally match.
Bill Evans
- Original Message -
From: "Magnus Robb"
To:
Sent: Sun
ir homes at night in migration to South America. That likely won't be
possible in 10 years. The species is in steep decline in NY as commercial wind
energy threatens the last remaining NY breeding stronghold (Jefferson County).
Bill Evans
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e until you choose to analyze your data.
Bill Evans
- Original Message -
From: "laurent fournier"
To:
Sent: Tuesday, June 14, 2011 10:15 AM
Subject: [nfc-l] hardware question from a beginner, recorder, preamp, etc
Hi All
I am currently in the process of building th
>From 10PM-4AM last night I only recorded two "chips" (Chestnut-sided and
>Canada types) from my residence ~6 miles south of Ithaca, so I suspect that
>few of the migrants indicated on PA NEXRADs last night were making it this far
>north -- perhaps a complex fallout zone across the southern
Greetings NFC,
I received a comment suggesting that it might be useful for the listserv to
review how one knows when NEXRAD reflectivity is birds, insects, and when it is
other phenomena.
I think a lot of this comes with field experience over time -- associating
nocturnal observations of
Message -
From: David La Puma
To: Bill Evans
Cc: NFC-L@cornell.edu
Sent: Monday, May 02, 2011 4:45 PM
Subject: Re: [nfc-l] odd NEXRAD pattern
Bill
That was my point. Clear air isn't an issue. I think the combined
reflectivity and velocity suggest bird migration. You ask "
activity this was.
Bill E
- Original Message -
From: David La Puma
To: Bill Evans
Cc: NFC-L@cornell.edu
Sent: Monday, May 02, 2011 3:25 PM
Subject: Re: [nfc-l] odd NEXRAD pattern
After reviewing the archive it looks like the KUEX radar was set on clear-air
mode
(here's
Interesting NEXRAD image from last: substantial migration to the east of a
front in the eastern US, nothing unusual about that, but strange is one
isolated radar lighting up in south-central Nebraska. -Bill E
x #1, and then clicking the Retrieve Document List button.
Yours in bird,
Bill Evans
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-
From: Erin Macchia
To: Bill Evans
Cc: nfc-l@cornell.edu
Sent: Monday, January 03, 2011 11:55 AM
Subject: Re: [nfc-l] nocturnal blackbird fatalities in Arkansas
Beebe, AR is a good-sized city, relative to most communities in northeast
Arkansas. There is a large, well-lit water
.
Bill Evans
- Original Message -
From: Dave Slager
To: nfc-l@cornell.edu
Sent: Sunday, January 02, 2011 7:43 PM
Subject: [nfc-l] nocturnal blackbird fatalities in Arkansas
http://www.cnn.com/2011/US/01/02/arkansas.falling.birds/index.html
I would guess a very large
Nfcers,
I begin by stating simply that if anyone ever substantiates a future
nocturnal vertebrate migration over interior northeastern US (in the first
two weeks of September) bigger than what occurred the night of Sep 10-11,
2010.I will buy fine ale for the whole nfc listserv membership
Greetings nfcers,
I've been on travel to the midwest this past 10 days and am just catching up on
recent nfc-l news:
Browsing the NCAR NEXRAD archive, I see that Dave Nicosia was right in that
there doesn't appear to have been any major push of nocturnal migrants in the
interior northeastern
David-
Thanks for providing the links referencing the Binghamton NEXRAD target I noted
10 days or so ago (early on to the near ENE in the Binghamton reflectivity
movie you provided below). In hindsight, I agree with your assessment that this
doesn't fit well for a flock of birds. For one, it
Dave -- rings like one of those calls I know I've heard but can't pin it to
species. My first take is that this is not from a plover, certainly not from
Black-bellied or Semipalmated. There is the possibility of a weird Golden
perhaps but it is unlike any I've heard.
It is reminiscent of
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