Date: 9/15/25 4:35 pm
From: <reports...>
Subject: [NHBirds] Pack Monadnock Raptor Migration Observatory (15 Sep 2025) 681 Raptors
Pack Monadnock Raptor Migration Observatory
Peterborough, New Hampshire, USA
Daily Raptor Counts: Sep 15, 2025
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Species Day's Count Month Total Season Total
------------------ ----------- -------------- --------------
Black Vulture 0 0 2
Turkey Vulture 2 2 2
Osprey 7 68 73
Bald Eagle 10 61 64
Northern Harrier 5 27 27
Sharp-shinned Hawk 73 340 346
Cooper's Hawk 7 77 77
American Goshawk 0 0 0
Red-shouldered Hawk 0 7 7
Broad-winged Hawk 562 4437 4459
Red-tailed Hawk 0 0 0
Rough-legged Hawk 0 0 0
Golden Eagle 0 0 0
American Kestrel 9 80 80
Merlin 5 18 19
Peregrine Falcon 0 1 1
Unknown Accipitrine 0 0 0
Unknown Buteo 0 1 1
Unknown Falcon 0 0 0
Unknown Eagle 0 0 0
Unknown Raptor 1 2 2

Total: 681 5121 5160
----------------------------------------------------------------------

Observation start time: 06:30:00
Observation end time: 16:00:00
Total observation time: 9.5 hours

Official Counter: Mark Timmerman, Nate Marchessault

Observers: Annamarie Saenger, Chuck Carlson, Glen & Lori Chretien,
Jim McCoy, Katrina Fenton, Levi Burford, Mark Timmerman,
Meade Cadot, Mike Gebo, Mitch Heydt, Nate Marchessault,
Tom Momeyer

Visitors:
Over 113 visitors today, 63 coming up to enjoy the mountain, birds or both,
and a school group of 47 kids, 3 teachers, and many (TBD) parents.



Weather:
Winds begun in the east and gradually transitioned to northeast during the
count period. A little breeze in the morning, then not much to speak of
through the rest of the count. Minimal clouds in the morning which built to
about 70% cover in the afternoon and gradually decreased from there. Temps
13-18 C.

Raptor Observations:
A strong start to the morning turned out to be carryover from yesterday's
excitement as things slowed down around noon. Regardless, the morning's
kettles and trickle of birds in the afternoon made for a great day of
hawkwatching. Harriers were 5 juvies and one non-adult male.

Non-raptor Observations:
A Common Nighthawk was our lunchtime excitement, making three passes around
the mountain before it wasn't seen again. The immature White-crowned
Sparrow was still around, as were the male and female towhee. Red-breasted
nuts are making sure we know they're still there.

Monarchs: 54 (319 season total)
Hummingbirds: 1 (63 season total)
Two red-spotted purples, two wandering gliders, and one cherry-faced
meadowhawk.

Predictions:
Warm with partial clouds, light winds from the E/SE. Not the best winds,
but there should be some birds moving!

The 17th tends to be the most likely day to have our highest count of the
season, but the weather isn't perfect for migration. Who knows?

On this day in Pack history: 2016: 3352 migrants counted. Katrina Fenton:
"No birds until after 9 EST, when right on cue, a Broad-winged Hawk
breached the horizon and proved to every raptor within eyeshot that the
thermals were starting. Before long, small kettles of 8-12 were rising. In
a couple more hours, kettles of 20-40 were being seen. A few hours later,
kettles of 100-200 or more were boiling up and spilling across the sky. The
peak of the flight didn't come until after 5, when a seemingly endless flow
of 896 birds streamed and kettled from far beyond the Lyndeboroughs to
Crotched and beyond. Broad-wingeds began to wander and look for places to
settle in for the night as thermals died to almost nothing around 6, some
swirling into the spruces not far below the count site."
========================================================================
Report submitted by Nate Marchessault (<nate...>)
Pack Monadnock Raptor Migration Observatory information may be found at:
www.harriscenter.org


More site information at hawkcount.org: https://hawkcount.org/siteinfo.php?rsite=320


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