Monday, 4 May 2026

[cobirds] Dinosaur Ridge - Denver Field Ornithologists (04 May 2026) 9 Raptors

Dinosaur Ridge - Denver Field Ornithologists
Golden, Colorado, USA

Daily Raptor Counts: May 04, 2026
Species Day's Count Month Total Season Total
Black Vulture 0 0 0
Turkey Vulture 3 13 175
Osprey 0 3 67
Bald Eagle 0 1 28
Northern Harrier 0 1 51
Sharp-shinned Hawk 1 5 200
Cooper's Hawk 2 15 264
American Goshawk 0 0 2
Red-shouldered Hawk 0 0 0
Broad-winged Hawk 0 16 96
Red-tailed Hawk 1 12 474
Rough-legged Hawk 0 0 0
Swainson's Hawk 0 1 53
Ferruginous Hawk 0 0 17
Golden Eagle 0 0 8
American Kestrel 2 8 704
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 0 1 6
Zone-tailed Hawk 0 1 1
Total: 9 77 2199


Observation start time: 09:00:00
Observation end time: 17:00:00
Total observation time: 8 hours
Official Counter Emma Riley
Observers:



Visitors:
We had 11 visitors to the ridge today including Michelle with Jefferson County Open Spaces. We have reached our final week of the season which leads us to saying goodbye to our regular volunteers. We want to extend the largest thank you to Clay Gibson, Mike Serruto, and Marirosa Donisi for regularly volunteering on Mondays throughout the year. All three of these wonderful volunteers have worked with us in previous years, and we love getting to spend time with them.

Weather:
Today was a very pleasant day on the ridge with cloud cover present for most of the day. The sun came out for about an hour in the afternoon before some precipitation moved in at the end of the day.

Raptor Observations:
Migration has slowed down with less than 10 birds counted today. The birds that did move through came close along the ridge giving us great looks. We have been seeing juvenile birds predominantly migrating which is typical for this time of year. The two American Kestrels came buzzing through the trees directly at eye level at the end of the day. We had a handful of local Red-tailed Hawks, Turkey Vultures, Cooper's Hawks, and two Bald Eagles present today. The local Golden Eagle also flew by in the early afternoon. An adult Cooper's Hawk perched in a snag just S of the platform giving us great looks at it before it flew below the ridge on the west side going after some passerines. Swallows and White-throated Swifts were out in massive quantities today with over 100 swallows up at once in the afternoon. We also saw our FOY Green-tailed Towhee today.

Non-raptor Observations:
White-throated Swift 20, Broad-tailed Hummingbird 2, Feral Pigeon 1, Mourning Dove 1, Say's Phoebe 1, Blue Jay 1, Woodhouse's Scrub Jay 2, American Crow 2, Common Raven 3, Tree Swallow 32, Violet-green Swallow 35, Cliff Swallow 1, swalow sp. 125, American Bushtit 4, Rock Wren 1, House Finch 2, Green-tailed Towhee 1, Spotted Towhee 1, Western Meadowlark 1, Yellow-rumped Warbler (Audubon's) 6

Predictions:
Precipitation in the form of rain and up to 8"+ of snow is predicted for the next 48 hours. We will keep an eye on the radar but except shortened and potentially cancelled counts.


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)

--
--
You received this message because you are subscribed to the Google Groups "Colorado Birds" group.
To post to this group, send email to cobirds@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/cobirds
* All posts should be signed with the poster's full name and city. Include bird species and location in the subject line when appropriate.
* Join Colorado Field Ornithologists https://cobirds.org/membership/
---
You received this message because you are subscribed to the Google Groups "Colorado Birds" group.
To unsubscribe from this group and stop receiving emails from it, send an email to cobirds+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/cobirds/0101019df641661f-c04f9ad8-07c3-4c74-b9fb-994b1b24e190-000000%40us-west-2.amazonses.com.

[cobirds] Lazuli Bunting

Had a male Lazuli Bunting on my birdbath yesterday. First time  in years I've seen a Lazuli in my yard.

Deborah Smith-Cleveland
North Boulder 

--
--
You received this message because you are subscribed to the Google Groups "Colorado Birds" group.
To post to this group, send email to cobirds@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/cobirds
* All posts should be signed with the poster's full name and city. Include bird species and location in the subject line when appropriate.
* Join Colorado Field Ornithologists https://cobirds.org/membership/
---
You received this message because you are subscribed to the Google Groups "Colorado Birds" group.
To unsubscribe from this group and stop receiving emails from it, send an email to cobirds+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/cobirds/CABc8NxDH90%3DDqHoEEfjsc7TksUT0qk2fgmjsYbDOsca05%2BewhQ%40mail.gmail.com.

[cobirds] Re: Aguilar Warblers

Wow, this is an awesome list. And great photos Isaac!

On Sunday, 3 May 2026 at 21:26:20 UTC-6 Archer Silverman wrote:
Hey all,

Jason Zolle, Isaac Boardman, and I had a great morning of birding around Aguilar today. I hope this email can provide a summary of the sightings along with strategies for birding the town.

The best area is a stretch of the Borrego Ditch, from here (37.398142, -104.656763) on San Luis Ave to here (37.396419, -104.657742) on S San Antonio Ave (See first linked habitat picture). This has had at least two American Redstarts, at least one Northern ParulaHooded WarblerKentucky Warbler, and Worm-eating Warbler. The Kentucky was not seen again today. The Worm-eating Warbler was extremely cooperative, hanging around the first set of coordinates and our group saw it on at least five separate occasions. The Hooded showed well for multiple observers today.

Another productive area is another section of the ditch here (37.400045, -104.652817), on South Ave between East St and Santa Rita St. This area had a Blackburnian Warbler yesterday and Northern Parula(s) both days, and a Yellow-throated Warbler today. It also had the best views of the large Leiothlypis (Orange-crowned and Virginia's Warblers) flock. One quick note about the Orange-crowns: of the thirteen our group had today, almost all appeared to be confirmable as the Pacific subspecies, L. c. lutescens.

There is another creek that runs through the north side of town (37.402799, -104.656279). Although it is currently dry, it provided a Tennessee Warbler yesterday and today. 

One other area that seems to be productive is here (37.401461, -104.650146), along 1st St. Luke and Pablo had Northern Waterthrush and Nashville Warbler here on 05/01.
Here's our list from today: https://ebird.org/checklist/S332180565
Happy birding!
-Archer Silverman
Denver

--
--
You received this message because you are subscribed to the Google Groups "Colorado Birds" group.
To post to this group, send email to cobirds@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/cobirds
* All posts should be signed with the poster's full name and city. Include bird species and location in the subject line when appropriate.
* Join Colorado Field Ornithologists https://cobirds.org/membership/
---
You received this message because you are subscribed to the Google Groups "Colorado Birds" group.
To unsubscribe from this group and stop receiving emails from it, send an email to cobirds+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/cobirds/c7437607-c64b-4dc7-bd5d-2573092f559an%40googlegroups.com.

Re: [cobirds] Re: Aguilar Warblers

On Mon, May 4, 2026 at 9:00 AM Jake Shorty <jakeshorty@gmail.com> wrote:
Wow, this is an awesome list. And great photos Isaac!

100% agree with Jake's assessment of the list and photos.

But I might clarify that this is an awesome *eBird checklist*, regardless of the awesomeness of the birds on the list. Superb comments, superb photos, superb context, superb everything. My guess is, the eBird reviewer for Las Animas County will very quickly verify all the exceptional sightings—because the eBirders (Archer S., Isaac B., Jason Z.) have helpfully, competently, and excellently done all the reviewer's work already! :-)

As opposed to, sad to say, the proliferation of Colorado eBird checklists with "evidence" (not) like:

"Photos"

"Male"

"Continuing"

"In a tree"

"Seen well"

"We have these on our property"

"I know this species well"

It is impossible for an eBird reviewer to accept a record with such "support" (not). Yes, of course, a hardworking eBird reviewer can reach out to the observer and ask to have the photos uploaded; or ask how you knew it was a male (or why that is even relevant); or who found the continuing bird (and how long it's been there); and what species of tree (which could, in certain instances, be relevant); or how far you were from the bird seen well (and how long you saw it for); and...well, as to "We have those" and "I know this," yeah no.

But that's not fair to the eBird reviewer at all, plus it slows down the eBird review process terribly. So, please, please, please: Let's all be like Archer & Isaac & Jason, and upload checklists like this one. You'll get your eBird records verified much more quickly! And, more important, you'll contribute to the quality and value of the eBird database.

Ted Floyd
Lafayette, Boulder Co.

On Sunday, 3 May 2026 at 21:26:20 UTC-6 Archer Silverman wrote:
Hey all,

Jason Zolle, Isaac Boardman, and I had a great morning of birding around Aguilar today. I hope this email can provide a summary of the sightings along with strategies for birding the town.

The best area is a stretch of the Borrego Ditch, from here (37.398142, -104.656763) on San Luis Ave to here (37.396419, -104.657742) on S San Antonio Ave (See first linked habitat picture). This has had at least two American Redstarts, at least one Northern ParulaHooded WarblerKentucky Warbler, and Worm-eating Warbler. The Kentucky was not seen again today. The Worm-eating Warbler was extremely cooperative, hanging around the first set of coordinates and our group saw it on at least five separate occasions. The Hooded showed well for multiple observers today.

Another productive area is another section of the ditch here (37.400045, -104.652817), on South Ave between East St and Santa Rita St. This area had a Blackburnian Warbler yesterday and Northern Parula(s) both days, and a Yellow-throated Warbler today. It also had the best views of the large Leiothlypis (Orange-crowned and Virginia's Warblers) flock. One quick note about the Orange-crowns: of the thirteen our group had today, almost all appeared to be confirmable as the Pacific subspecies, L. c. lutescens.

There is another creek that runs through the north side of town (37.402799, -104.656279). Although it is currently dry, it provided a Tennessee Warbler yesterday and today. 

One other area that seems to be productive is here (37.401461, -104.650146), along 1st St. Luke and Pablo had Northern Waterthrush and Nashville Warbler here on 05/01.
Here's our list from today: https://ebird.org/checklist/S332180565
Happy birding!
-Archer Silverman
Denver


--
--
You received this message because you are subscribed to the Google Groups "Colorado Birds" group.
To post to this group, send email to cobirds@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/cobirds
* All posts should be signed with the poster's full name and city. Include bird species and location in the subject line when appropriate.
* Join Colorado Field Ornithologists https://cobirds.org/membership/
---
You received this message because you are subscribed to the Google Groups "Colorado Birds" group.
To unsubscribe from this group and stop receiving emails from it, send an email to cobirds+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/cobirds/CAGk944djMQ%2BUxhZgY-ELv%3DtNh1oi60vj3Fn42p3TDJirQNy2YA%40mail.gmail.com.

[cobirds] Aguilar Warblers

Hey all,

Jason Zolle, Isaac Boardman, and I had a great morning of birding around Aguilar today. I hope this email can provide a summary of the sightings along with strategies for birding the town.

The best area is a stretch of the Borrego Ditch, from here (37.398142, -104.656763) on San Luis Ave to here (37.396419, -104.657742) on S San Antonio Ave (See first linked habitat picture). This has had at least two American Redstarts, at least one Northern ParulaHooded WarblerKentucky Warbler, and Worm-eating Warbler. The Kentucky was not seen again today. The Worm-eating Warbler was extremely cooperative, hanging around the first set of coordinates and our group saw it on at least five separate occasions. The Hooded showed well for multiple observers today.

Another productive area is another section of the ditch here (37.400045, -104.652817), on South Ave between East St and Santa Rita St. This area had a Blackburnian Warbler yesterday and Northern Parula(s) both days, and a Yellow-throated Warbler today. It also had the best views of the large Leiothlypis (Orange-crowned and Virginia's Warblers) flock. One quick note about the Orange-crowns: of the thirteen our group had today, almost all appeared to be confirmable as the Pacific subspecies, L. c. lutescens.

There is another creek that runs through the north side of town (37.402799, -104.656279). Although it is currently dry, it provided a Tennessee Warbler yesterday and today. 

One other area that seems to be productive is here (37.401461, -104.650146), along 1st St. Luke and Pablo had Northern Waterthrush and Nashville Warbler here on 05/01.
Here's our list from today: https://ebird.org/checklist/S332180565
Happy birding!
-Archer Silverman
Denver

--
--
You received this message because you are subscribed to the Google Groups "Colorado Birds" group.
To post to this group, send email to cobirds@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/cobirds
* All posts should be signed with the poster's full name and city. Include bird species and location in the subject line when appropriate.
* Join Colorado Field Ornithologists https://cobirds.org/membership/
---
You received this message because you are subscribed to the Google Groups "Colorado Birds" group.
To unsubscribe from this group and stop receiving emails from it, send an email to cobirds+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/cobirds/CAL_8wP06smfVVjb8Z3uDxgE2oWw7%3DtVKrWepDZe9uK5v2o8Ryg%40mail.gmail.com.

[cobirds] Chatfield Banding Station, Bird Conservancy of the Rockies 5-3-26

Sunday was another very slow day, we banded only 3 birds and caught 2 others that had been banded in prior years:

Northern House Wren 1 new, 1 banded last year
Ruby-crowned Kinglet 1
Spotted Towhee 1, a female with a brood patch, banded 4/29/23
White-crowned Sparrow, Gambel's 1

Today is our normal day off; banding iffy for Tues and Wed due to potential bad weather.  Hoping for more birds soon!

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

--
--
You received this message because you are subscribed to the Google Groups "Colorado Birds" group.
To post to this group, send email to cobirds@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/cobirds
* All posts should be signed with the poster's full name and city. Include bird species and location in the subject line when appropriate.
* Join Colorado Field Ornithologists https://cobirds.org/membership/
---
You received this message because you are subscribed to the Google Groups "Colorado Birds" group.
To unsubscribe from this group and stop receiving emails from it, send an email to cobirds+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/cobirds/9500dec7-91da-482d-91c4-e05e87ea71d2n%40googlegroups.com.

[cobirds] Louisiana Waterthrush - SE Denver - Belleview and DTC Blvd

Yesterday evening I discovered a Lousiana Waterthrush at Wallace Park. It was still there this morning, if you'd like to go see it!

I had decided to give myself a little personal challenge in May and visit 'unvisited' eBird hotspots, just to give those hotspots some data and attention, and move them over to the 'visited' group for a bit. So my boyfriend and I went on a walk at Wallace park last night. I told him not to bother bringing his camera, as I expected we would just see Robins and Magpies. So he didn't.

In the concrete waterway under Belleview, I spotted a little bird running about in the water and thought, that seems like a special bird for this location. I took a couple pictures with my phone through my binoculars. My first thought was Dipper, but I looked it up in my phone field guides and quickly ruled it out. 

Merlin was no help. It couldn't pick up the little 'cheep' sound it was making. It couldn't figure out what bird was in my photo when I put it through photo ID. I did the step by step ID and got nowhere. A mystery!

I came home and looked through my big field guides at ALL the sandpipers. I finally thought, "well, it's not exactly right, but Spotted Sandpiper seems like the most likely. Maybe it's some kind of morph or juvenile that there isn't a picture of in my guide." 

Posted my photo to the CFO facebook group and discovered it was a waterthrush!! A warbler!? What! I never! 

Then I learned, it's a very rare-for-Colorado Louisiana Waterthrush!! So this morning my boyfriend grabbed his camera and joined a dozen other guys with their cameras under the bridge and we confirmed it is a Louisiana Waterthrush and he got his pictures and wasn't upset anymore about missing getting a picture of a rare bird.

I love learning about birds. Never would I ever have thought to look through the warbler section for this bird! Thank you to the people on the facebook group, the people at the bird this morning, and broadly, the people on this email list who have helped me on this bird and learning about birds and birding in the past. I'm excited to have made this discovery, and it was just because I wanted to bird some 'underbirded' areas this month. And I have learned so much!!! 

--
--
You received this message because you are subscribed to the Google Groups "Colorado Birds" group.
To post to this group, send email to cobirds@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/cobirds
* All posts should be signed with the poster's full name and city. Include bird species and location in the subject line when appropriate.
* Join Colorado Field Ornithologists https://cobirds.org/membership/
---
You received this message because you are subscribed to the Google Groups "Colorado Birds" group.
To unsubscribe from this group and stop receiving emails from it, send an email to cobirds+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/cobirds/45af6a14-63a3-4cdc-acbb-84278df3400cn%40googlegroups.com.