Friday, 1 May 2026

[cobirds] Dinosaur Ridge - Denver Field Ornithologists (01 May 2026) 45 Raptors

Dinosaur Ridge - Denver Field Ornithologists
Golden, Colorado, USA

Daily Raptor Counts: May 01, 2026
Species Day's Count Month Total Season Total
Black Vulture 0 0 0
Turkey Vulture 7 7 169
Osprey 2 2 66
Bald Eagle 1 1 28
Northern Harrier 1 1 51
Sharp-shinned Hawk 3 3 198
Cooper's Hawk 7 7 256
American Goshawk 0 0 2
Red-shouldered Hawk 0 0 0
Broad-winged Hawk 14 14 94
Red-tailed Hawk 6 6 468
Rough-legged Hawk 0 0 0
Swainson's Hawk 0 0 52
Ferruginous Hawk 0 0 17
Golden Eagle 0 0 8
American Kestrel 2 2 698
Merlin 0 0 7
Peregrine Falcon 0 0 10
Prairie Falcon 0 0 4
Mississippi Kite 0 0 0
Unknown Accipitrine 0 0 22
Unknown Buteo 0 0 5
Unknown Falcon 0 0 5
Unknown Eagle 0 0 0
Unknown Raptor 1 1 6
Zone-tailed Hawk 1 1 1
Total: 45 45 2167


Observation start time: 08:30:00
Observation end time: 17:00:00
Total observation time: 8.5 hours
Official Counter Soren Zappia
Observers:



Visitors:
5 visitors. We had a few visitors throughout the day come to witness the spring migration and enjoy the perfect weather. Thank you to volunteers Cayce and Chris Gulbransen, and Janet Peters. Your hard work and dedication shines through on days like these! We also appreciate your patience when watching Turkey Vultures and Bald Eagles to be sure they won't turn around on us.

Weather:
It was a beautiful weather day today with mostly cloudy skies for most of the morning, and light winds from 1-2 bft that varied from NE to SE. Temperatures started as cool in the mid 40s to low 60s F. As the day went on, the cloud cover cleared and temperatures heated up to the low 70s as the sun was shining.

Raptor Observations:
It was a great May morning, and we saw a good number of migrants, including a very special bird! There was a good flight of Broad-winged Hawks this morning. Some birds were distant or high, but many were low enough to see without binoculars. A dark morph adult BW was spotted low on the east before gaining height and joining a light morph BW in a thermal, giving fantastic looks to all our volunteers and visitors! The highlight of the day was a Zone-tailed Hawk seen around 11:30 MST! The bird was initially spotted by volunteer Cayce as she said that she had a likely Turkey Vulture but that something seemed not right. The bird initially had a very TV-like appearance but as it came closer, its subtle differences in shape and black-and-white banded tail became apparent. It continued past out of sight below the horizon on the west, heading north. This is the first Zone-tailed Hawk recorded at the ridge, and we were very excited for this rare visitor from the southwest! We also had a few Red-tailed Hawks, Cooper's Hawks, and Sharp-shinned Hawks as well, but Swainson's Hawks were surprisingly absent from the ridge today. The final hours were slow, but we did see a few Turkey Vultures migrate including a group of five. A Bobcat was also seen on the ridge as we were packing up.

Non-raptor Observations:
White-throated Swift 50, Broad-tailed Hummingbird 2, Mourning Dove 2, Say's Phoebe 1, Blue Jay 1, Woodhouse's Scrub Jay 1, Black-billed Magpie 2, Common Raven 3, Tree Swallow 3, Violet-green Swallow 11, Rock Wren 1, House Finch 1, Pine Siskin 2, Spotted Towhee 2, Western Meadowlark 1, Red-winged Blackbird 4, blackbird sp. 3, Yellow-rumped Warbler (Audubon's) 2

Predictions:
Tomorrow sunny skies are predicted with temperatures in the mid 50s to high 60s F. The forecast shows light winds from the east and southeast. The UV index is predicted to be very high, so make sure to apply and reapply sunscreen!


Report submitted by Official Counter of the day shown above (dinoridgehw@gmail.com)
Dinosaur Ridge - Denver Field Ornithologists information may be found at: www.dinosaurridgehawkwatch.org
More information at hawkcount.org: [Site Profile] [Day Summary] [Month Summary]
Count data submitted via Trektellen.org - [Project Details]




Site Description
Dinosaur Ridge is the only regularly staffed hawk watch in Colorado and is the
best place in the world to see migrating Ferruginous Hawks. Hawk watchers may
see 17 species of migrating raptors; and it is an excellent site to see rare
dark morph buteos including Broad-winged hawk, Swainson's hawk, Ferruginous
hawk, Rough-legged hawk and Red-tailed Hawk. Other raptors we see include Golden
and Bald Eagles, Northern harrier, Osprey, Peregrine Falcons, Prairie Falcons,
Cooper's and Sharp-shinned Hawks, American Kestrels, Merlin, and Turkey
Vultures. American Goshawk is uncommon but also counted each season. Non-raptor
species include Rock Wren, Bushtit, Western Bluebird, Sandhill Crane,
White-throated Swift, and American White Pelican. Birders of any skill level are
always welcome. The hawk watch at Dinosaur Ridge is staffed by Hawk Counter(s)
and volunteers from March through early May.

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 hawk watch signs from the
southwest end of the parking lot to the hawk watch 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, and walk to
the flat area at the crest of the ridge. (Distance: 0.56 miles, Elevation gain:
259 feet)

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[cobirds] Re: Blackburnian Warbler Las Animaa

Worm Eating Warbler here 
(37.3977301, -104.6569238)

On Fri, May 1, 2026 at 2:26 PM Luke Pheneger <phenegerluke@gmail.com> wrote:
Tennessee Warbler same spot as Blackburnian 

On Fri, May 1, 2026 at 2:09 PM Luke Pheneger <phenegerluke@gmail.com> wrote:
Hi All,

Pablo Quezada and I just had a female Blackburnian Warbler in the town of Aguilar. The exact coordinates are here: 
(37.4001174, -104.6533105)

Also present in town was a Nashville Warbler and a female redstart. Overall great migrant numbers today.

At Lathrop SP (Huerfano) we had 4 Northern Parulas and a Northern Waterthrush. 

Luke Pheneger 

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[cobirds] Re: Blackburnian Warbler Las Animaa

Tennessee Warbler same spot as Blackburnian 

On Fri, May 1, 2026 at 2:09 PM Luke Pheneger <phenegerluke@gmail.com> wrote:
Hi All,

Pablo Quezada and I just had a female Blackburnian Warbler in the town of Aguilar. The exact coordinates are here: 
(37.4001174, -104.6533105)

Also present in town was a Nashville Warbler and a female redstart. Overall great migrant numbers today.

At Lathrop SP (Huerfano) we had 4 Northern Parulas and a Northern Waterthrush. 

Luke Pheneger 

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[cobirds] Hudsonian Godwit in Prowers County 5/1

In a flooded field on Hwy 196, east of Lamar, just east of County Road 10.

Other highlights yesterday and today in SE Colorado:
2 male Hooded Warblers in Prowers County
1 male Tennessee Warbler in Prowers County
2 Northern Parula in Prowers County
1 Northern Waterthrush in Prowers
1 Summer Tanager in Prowers County
1 Least Flycatcher in Prowers County, 1 in Bent County
1 flyover Hudsonian Whimbrel in Prowers County
4 Western Cattle Egrets in Prowers County
Eastern Warbling Vireos singing in Bent and Prowers Counties

I think that is all for now.

Brandon K. Percival
Pueblo West, CO

Sent from my Phone

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[cobirds] Blackburnian Warbler Las Animaa

Hi All,

Pablo Quezada and I just had a female Blackburnian Warbler in the town of Aguilar. The exact coordinates are here: 
(37.4001174, -104.6533105)

Also present in town was a Nashville Warbler and a female redstart. Overall great migrant numbers today.

At Lathrop SP (Huerfano) we had 4 Northern Parulas and a Northern Waterthrush. 

Luke Pheneger 

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[cobirds] Chatfield Banding Station, Bird Conservancy of the Rockies 5-1-26

We were rained out yesterday (2nd time this week).  I was thrilled to see clear skies this morning, and was expecting a lot of bird activity after so much clouds and rain.  But the birds slept in.....we banded our first bird at 9 and it continued to be slow the balance of the morning.

The most interesting capture was a female Pine Siskin with a full brood patch. This is only the 4th PISI ever caught at the station, and we are asking ourselves....they breed here?  In the Second CO Bird Breeding Atlas, Doug Kibbe writes, "Nomadic" and "opportunistic" are terms often used in describing the PISI's lifestyle.....shows little site fidelity".  Perhaps this year's unusual weather has had an impact on at least one pair. 

Here are the 13 birds caught for the first time this season:

White-breasted Nuthatch 2 (male and female caught together, in breeding condition - both had brood patches, as can occur with this species)
Northern House Wren 2
American Robin 1
Yellow-rumped Warbler, Myrtle 1
Yellow-rumped Warbler, Audubon's 2
Spotted Towhee 1 new, 1 banded last fall
Lincoln's Sparrow 1
White-crowned Sparrow, Mountain 1 (first of this subspecies this season)
Pine Siskin 1

We are banding Tuesday through Sunday (closed Mondays) through May 31, weather permitting.  There are opportunities for the public to visit on weekends and early mornings most weekdays.  Reservations are required and can be made through the Denver Audubon website.  (Many/most sessions are already sold out, so sign up now if you are interested!)

Meredith McBurney
Bander, Bird Conservancy of the Rockies

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[cobirds] Chico Basin Ranch Banding Station Report- May 1, 2026-Bird Conservancy of the Rockies

Yesterday the weather was conducive for banding. Today we had a normal opening and once the sun came out the birds were busy hunting for insects. They were active hunting after 9:30 AM. Three new species for the season include Tennessee Warbler, Brewer's Sparrow, and American Goldfinch. 

48 New Banded Birds
Tennessee Warbler- 1
Orange-crowned Warbler- 2
Common Yellowthroat- 1
Myrtle (Yellow-rumped) Warbler- 13
Audubon's (Yellow-rumped) Warbler- 8
Intergrade Yellow-rumped Warbler- 3
Northern House Wren- 2
Swainson's Thrush- 1
Chipping Sparrow- 7
Brewer's Sparrow- 2
American Goldfinch- 1
Mountain (White-crowned) Sparrow-1
Gambel's (White-crowned) Sparrow- 5
Spotted Towhee- 1

1 Return-still waiting on the original banding date info
Blue Jay

The Ranch Roads should be dry enough to visit tomorrow. Please register on the Aiken Audubon Website www.aikenaudubon.com

Please stop by the banding station to share your sightings. The Banding station will be open tomorrow from Sunrise until @11 AM. 

Nice to see the sunshine!
Have a good day,

Julie Shieldcastle
Chico Basin Ranch Bird Bander
Bird Conservancy of the Rockies

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[cobirds] Eastern Phoebe in SLV

The action is picking up somewhat. Yesterday I had an Eastern Phoebe in Rio Grande County. There are few ebird records and a few prior to ebird. So less than 10 records. 
Also Northern Waterthrush and Green Heron are unusual. 

Had a little snow last night and will head out to see what might have dropped in. 

John Rawinski
Monte Vista, CO

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