Date: 4/6/21 3:31 pm
From: <reports...>
Subject: [cobirds] Dinosaur Ridge - Denver Field Ornithologists (06 Apr 2021) 23 Raptors
Dinosaur Ridge - Denver Field Ornithologists
Colorado, USA
Daily Raptor Counts: Apr 06, 2021

Species Day's Count Month Total Season Total
------------------ ----------- -------------- --------------
Black Vulture 0 0 0
Turkey Vulture 2 13 16
Osprey 0 0 0
Bald Eagle 0 2 15
Northern Harrier 0 0 0
Sharp-shinned Hawk 0 6 20
Cooper's Hawk 5 18 29
Northern Goshawk 1 2 6
Red-shouldered Hawk 0 0 0
Broad-winged Hawk 0 1 1
Red-tailed Hawk 7 43 236
Rough-legged Hawk 0 0 1
Swainson's Hawk 2 2 2
Ferruginous Hawk 1 1 7
Golden Eagle 0 0 6
American Kestrel 5 14 16
Merlin 0 0 4
Peregrine Falcon 0 0 4
Prairie Falcon 0 0 1
Mississippi Kite 0 0 0
Unknown Accipiter 0 0 1
Unknown Buteo 0 2 11
Unknown Falcon 0 0 2
Unknown Eagle 0 0 0
Unknown Raptor 0 0 3

Total: 23 104 381

Observation start time: 08:30:00
Observation end time: 13:15:00
Total observation time: 4.75 hours

Official Counter: Carol Cwiklinski


There were bikers, hikers and dog walkers on the trail today. I had no
visitors to observation.

The day started out with a clear blue sky. Gradually storms developed from
the north.

Raptor Observations:
Raptors were migrating today, but sometimes just a few in an hour. It is
likely the cloudless skies made it more difficult to see them, as evidenced
by the count in the final hours. American kestrels were especially
difficult to locate, often flying high and east of the ridge.
The 1200-1300 hour I witnessed a push of birds likely due to the storms.
All the raptors during this hour were eye level at the ridge, except for
the Swainson’s Hawks which were spotted at limit of unaided eye.

Non-raptor Observations:
Violet green swallows, Mountain Bluebirds, White throated swifts.
Report submitted by DAVID HILL ()
Dinosaur Ridge - Denver Field Ornithologists information may be found at:

More site information 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 of any skill level are always welcome. HawkWatch at
Dinosaur Ridge is generally staffed by volunteers 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 southwest end of lot to the 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 ridge. (Distance: 0.56 miles, Elevation gain: 259 feet)

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