Please join Bill Evans and me tonight, Friday, August 23, 2019, for a late 
evening of night listening atop Mount Pleasant at the Hartung-Boothroyd 
Observatory, located East of Ithaca, NY.

The address for this location is: 553 Mount Pleasant Rd, Freeville, NY. The 
Observatory is located on the South side of Mount Pleasant Road.

We will mostly like be set up on the South side of the Observatory by 9:00pm, 
and plan to take down once the night flight calls diminish, by midnight, unless 
there is a more significant migration.

Birds should start moving after the end of Civil Twilight, which will be around 
9:00pm, and there will be a lull around 11:00pm, due to the Lake Ontario shadow.

Please take care when parking to avoid the roadside ditches and stay alert for 
passing cars.

Because microphones will be set up and people listening, please try to keep 
voices to a whisper as you approach or while you hang out with the group.

What to bring: flashlight, chair, warm clothes or a blanket. It will be clear, 
damp, and cool, with a low around 50ºF.

Good night listening wherever you are!

Chris T-H

More information from Bill Evans, below.

Begin forwarded message:

From: Bill Evans <<>>
Subject: [cayugabirds-l] Nocturnal flight calls @ Mt. P Friday night
Date: August 22, 2019 at 10:21:47 PM EDT
To: Cayuga Birds <<>>, 
natural history network 
Reply-To: Bill Evans 

Greetings birders,
There will be public night flight call listening session tomorrow night 
(Friday) near the Hartung-Boothroyd Observatory atop Mount Pleasant Rd., a few 
miles east of Ithaca from 8:30pm to 11pm or later.

The forecast is for a clear sky with north wind 5-10 mph. Birds will be high 
but we’ll have microphones and other tools to help tune in.

I expect a steady flight of Bobolink & Veery, as well as lots & lots of 
warblers. Based on this time in past years, 30% of the warbler calls will be 
about equally from American Redstart, Chestnut-sided Warbler, and Ovenbird. 20% 
(1 in 5) will be what are often referred to as “zeeps”, short modulated 
(slightly buzzy) calls from a complex of species very difficult to distinguish 
by ear (mostly likely tomorrow night are Magnolia & Blackburnian, but also 
Yellow, Blackpoll and maybe even Cerulean). Less common will be the distinctive 
night flight call of Canada Warbler (~ 1 out of every 30 warbler calls) and the 
more difficult but still distinctive Mourning Warbler (~1 out of every 50 
warbler calls). You can hear these calls online at:

There will be many of other species in the mix tomorrow night and maybe the 
first Tompkins County record of Upland Sandpiper in more than a year.

We usually have this listening session in September, but tomorrow night is 
really looking good, with shades of once in a lifetime, and of course it’s a 
Friday night!

More info posted tomorrow.

Bill Evans

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Christopher T. Tessaglia-Hymes
Field Applications Engineer
Bioacoustics Research Program, Cornell Lab of Ornithology
159 Sapsucker Woods Road, Ithaca, New York 14850
W: 607-254-2418<tel:607-254-2418>   M: 607-351-5740<tel:607-351-5740>   F: 

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