Date: 4/1/21 3:25 pm
From: <reports...>
Subject: [cobirds] Dinosaur Ridge - Denver Field Ornithologists (01 Apr 2021) 14 Raptors
Dinosaur Ridge - Denver Field Ornithologists
Colorado, USA
Daily Raptor Counts: Apr 01, 2021

Species Day's Count Month Total Season Total
------------------ ----------- -------------- --------------
Black Vulture 0 0 0
Turkey Vulture 1 1 4
Osprey 0 0 0
Bald Eagle 0 0 13
Northern Harrier 0 0 0
Sharp-shinned Hawk 2 2 16
Cooper's Hawk 2 2 13
Northern Goshawk 0 0 4
Red-shouldered Hawk 0 0 0
Broad-winged Hawk 0 0 0
Red-tailed Hawk 8 8 201
Rough-legged Hawk 0 0 1
Swainson's Hawk 0 0 0
Ferruginous Hawk 0 0 6
Golden Eagle 0 0 6
American Kestrel 1 1 3
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 0 9
Unknown Falcon 0 0 2
Unknown Eagle 0 0 0
Unknown Raptor 0 0 3

Total: 14 14 291

Observation start time: 09:00:00
Observation end time: 14:00:00
Total observation time: 5 hours

Official Counter: Gary Rossmiller

Observers: Barb Goncalves, Eddie Israel, Janet Peters

Trail and the platform were quite busy today. Barb and Eddie helped us out
for several hours making sighting much easier.

Day was sunny, slight breeze out of the east or se, B1-B3 with a few gusts
to B4, just a beautiful day. Lots of haze still in the sky from recent
moisture. Barometer dropped from 24.79 down to 24.70, humidity dropping
from 36% down to 11%. Horizons visible at 33km. Trail is dry except for a
few small muddy spots in the shade. I'm surprised how much snow is still
lingering on the north of Mt. Morrison. Lots of drifts.

Raptor Observations:
Day started out with a busy sky just to the east of the site at eye level
or below. One raptor between 12-1pm, after that nothing. My second Harlan's
of the season gave us a good look at eye level. A couple of the RT's and
one of the CH soared very high before moving along. 2 of the RT's moved NW,
all other migrators headed north. Maybe 2 pair of local RT's today. A adult
BE headed our way until about a 1/4 mile south of us, then turned around to
the south.

Non-raptor Observations:
Local birds were almost absent; Solitaire, Magpies, Mtn Chickadee, Raven,
local TV, a small moth, and a Woodhouse. 6 deer to the west of Rooney Rd
down by the Visitor Center. 4 brightly colored small airplanes went
overhead and then east between 10-11. 7 Canadian Geese headed south on the
west side. Matthew Winters reopened for the first time in about a week.

Warmer and windier. I thought this afternoon was an excellent day to
migrate, but evidently not. Tomorrow should be better. Be prepared for the
early birds down low.
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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