Date: 3/25/21 6:44 pm
From: <reports...>
Subject: [cobirds] Dinosaur Ridge - Denver Field Ornithologists (25 Mar 2021) 13 Raptors
Dinosaur Ridge - Denver Field Ornithologists
Colorado, USA
Daily Raptor Counts: Mar 25, 2021

Species Day's Count Month Total Season Total
------------------ ----------- -------------- --------------
Black Vulture 0 0 0
Turkey Vulture 0 0 0
Osprey 0 0 0
Bald Eagle 0 10 10
Northern Harrier 0 0 0
Sharp-shinned Hawk 1 6 6
Cooper's Hawk 1 3 3
Northern Goshawk 1 4 4
Red-shouldered Hawk 0 0 0
Broad-winged Hawk 0 0 0
Red-tailed Hawk 10 103 103
Rough-legged Hawk 0 1 1
Swainson's Hawk 0 0 0
Ferruginous Hawk 0 6 6
Golden Eagle 0 3 3
American Kestrel 0 1 1
Merlin 0 2 2
Peregrine Falcon 0 1 1
Prairie Falcon 0 0 0
Mississippi Kite 0 0 0
Unknown Accipiter 0 0 0
Unknown Buteo 0 7 7
Unknown Falcon 0 2 2
Unknown Eagle 0 0 0
Unknown Raptor 0 3 3

Total: 13 152 152

Observation start time: 09:00:00
Observation end time: 15:00:00
Total observation time: 6 hours

Official Counter: Gary Rossmiller

Observers: Bill Hancock, Celeste Rossmiller, Janet Peters

Bill Hancock from Maine was in town visiting his kids. He was there most of
the day, excellent birder, asking Janet about local sites and local birds.
My sister, Celeste, spent the day with us. She spotted several birds also.

Overcast with some sun peaking thru mid-day. Slowly falling barometer from
24.29 to 24.23, wind a very consistent B2-B3 out of the east. Humidity
dropped from 50% down to 26%. Trail was frozen on the way up, getting dry
in spots on the way down except for the first steep part. Still lots of
snow and/or mud. Horizons visible.
Observation deck is clear, mostly dry.

Raptor Observations:
Sporadic, most flights straight over the ridge, some over the west valley.
A few migrators spotted when we watched a primary migrator head north. A
NG, SS, and a CH rounded out a bunch of RT. Several local RT seen all day
but not consistent. UA got by us heading south. Early birds went over
fairly low, later birds soared to limit of eye sight.

Non-raptor Observations:
Elk (20) on the peak just to the right of the Cabrini statue, a nice bunch
of 20+ Mountain Bluebirds visited us late today resting on the powerlines.
Flicker, Solitaire, Magpie, Robin, Crows, Ravens, Woodhouse Jay. Very large
hiking group on trail, trail fairly busy with hikers and runners. Two
parties asked where the dinosaur tracks are.
MW and Green Mountain Park trails were closed today, due to muddy

Wet tomorrow, doesn't look good. 52F on Sat, 65 on Sunday! Be ready!!
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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