Date: 4/20/17 5:19 pm
From: <reports...>
Subject: [cobirds] Dinosaur Ridge - Bird Conservancy of the Rockies (20 Apr 2017) 15 Raptors
Dinosaur Ridge - Bird Conservancy of the Rockies
Colorado, USA
Daily Raptor Counts: Apr 20, 2017

Species Day's Count Month Total Season Total
------------------ ----------- -------------- --------------
Black Vulture 0 0 0
Turkey Vulture 1 39 39
Osprey 1 4 4
Bald Eagle 0 4 13
Northern Harrier 1 1 1
Sharp-shinned Hawk 1 25 35
Cooper's Hawk 2 48 53
Northern Goshawk 0 0 0
Red-shouldered Hawk 0 0 0
Broad-winged Hawk 0 8 8
Red-tailed Hawk 6 64 244
Rough-legged Hawk 0 0 0
Swainson's Hawk 0 11 11
Ferruginous Hawk 0 2 7
Golden Eagle 0 0 3
American Kestrel 0 27 39
Merlin 0 0 0
Peregrine Falcon 0 4 6
Prairie Falcon 0 5 6
Mississippi Kite 0 0 0
Unknown Accipiter 0 5 9
Unknown Buteo 1 10 25
Unknown Falcon 0 5 8
Unknown Eagle 0 0 0
Unknown Raptor 2 11 18

Total: 15 273 529

Observation start time: 08:00:00
Observation end time: 12:30:00
Total observation time: 4.5 hours

Official Counter: Joyce Commercon

Observers: Gary Rossmiller, Matt Gray

Matt Gray spent a few hours helping us and was very good at spotting
raptors, and passerines, too. Sandy, a previous visitor, arrived near noon
MST with a fairly large group of hikers, many of which were interested in
HawkWatch; several were excited to see some of the local Red-tailed Hawks
soaring very high above the platform.

The day started partly sunny with 50-percent thin, scattered, brush-stroke
cloud-cover, which progressively thickened and increased, becoming heavy
gray cumulus covering at least 80-percent of the sky by noon MST. Winds
were from the east and southeast (bft 2-3). The temperature rose from 11 C
to 15 C. Late morning brought the stronger breezes; lower level clouds
moved west while upper level clouds moved east. Visibility was good,
although the cloud ceiling dropped not long after noon, when a light,
steady rain arrived from the west.

Raptor Observations:
Most of the migrants were high today, even in the morning, but cloud-cover
aided detection. The majority migrated along the western ridges or the
western valley; even the few spotted along Dinosaur Ridge shifted to move
north up the west-side valley. The highlight of the day was an immature
(or possibly female) Northern Harrier that flew over the platform. A
migrating Osprey and a nice view of a heavily-marked (dark-morph) juvenile
Red-tailed Hawk were also welcome additions to the day. The local
Red-tailed Hawks were out and about today, several of them soaring
extremely high against the gray sky not long before the rain started.
Earlier in the morning, one Red-tailed adult, situated on a pole in Rooney
Valley, was harassed by a male American Kestrel until it was forced to
leave its perch. The local Sharp-shinned Hawk was also seen a few times.

Non-raptor Observations:
A few American Goldfinches were heard "potato-chipping" their way down
Rooney Valley. About ten Violet-green Swallows passed the platform as they
headed north up the western valley. Several White-throated Swifts flitted
about all morning, up and down the ridges and valleys. Also seen or heard
were House Finch, Western Meadowlark, Black-capped Chickadee, American
Robin, Spotted Towhee, Common Raven, Canyon Wren, Blue-gray Gnatcatcher,
Broad-tailed Hummingbird, and Black-billed Magpie. Twelve Mule Deer were
spotted at the base of the Ridge in Rooney Valley near noon.
Report submitted by Bird Conservancy of the Rockies (<jeff.birek...>)
Dinosaur Ridge - Bird Conservancy of the Rockies information may be found at:

Site Description:
Dinosaur Ridge is the only regularly staffed hawkwatch in Colorado and is
the best place in the world to see migrating Ferruginous Hawks. Dinosaur
Ridge may be the best place in the country to see the rare dark morph of
the Broad-winged Hawk (a few are seen each spring). Hawkwatchers who linger
long enough may see resident Golden Eagles, Red-tailed Hawks and Prairie
Falcons, in addition to migrating Swainson's, Cooper's and Sharp-shinned
Hawks, American Kestrels and Turkey Vultures. Peregrine Falcons and
Ferruginous Hawks are uncommon; Northern Goshawk is rare but regular.
Non-raptor species include Rock Wren, and sometimes Bushtit, Western
Bluebird, Sandhill Crane, White-throated Swift, American White Pelican or
Dusky Grouse. Birders are always welcome.
The hawkwatch is generally staffed by volunteers from Bird Conservancy of
the Rockies from about 9 AM to around 3 PM from March 1st to May 7th.

Directions to site:
From exit 259 on I-70 towards Morrison, drive south under freeway and take
left into first parking lot, the Stegosaurus lot. Follow small signs from
the south side of lot to hawkwatch site. The hike starts heading east on an
old two-track and quickly turns south onto a trail on the west side of the
ridge. When the trail nears the top of the ridge, turn left, head through
the gate, and walk to the clearly-visible, flat area at the crest of the

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