Re: [cobirds] Chico Basin Ranch Banding Station Report- Bird Conservancy of the Rockies-5/9/2025

Thanks very much, Julie.  Those are interesting examples of vagaries of migration and some things that impact migration. For me they still beg the question about the multiple summary reports of long term declines in bird populations of many species, and how this plays out in what we encounter in the field -- all things considered -- if the conclusions of these reports are to be believed. And it is not only the consideration of migrants passing through to elsewhere, but those that migrate to and breed here in Colorado. It seems that on the whole we birders expect lots of migrants in a general region, and are surprised when it doesn't happen. Or we expect things to be as they were, but clearly they are not. 

David Suddjian

Littleton, CO

On Sat, May 10, 2025 at 1:33 PM Chicobander <jshieldcastle@gmail.com> wrote:

That is a good question. But what needs to be considered also is that weather depicts where these songbirds migrate. Last week there was storms in the eastern Midwest and here in the Western Plains/Colorado area. As I said when you look at Birdcast last week the whole central plains was lit up. The birds that particular night migrated from Texas boot to North Dakota and onto Canada. The best way to assess bird numbers is to have a network of research stations in the different regions of the U.S. and compare what is being observed. I am not going to deny that bird populations are declining. However, we must realize that these birds are fluid and go where the wind takes them. Unless they are breeding species, they may not stop over where they normally do in a certain year/season if weather is pushing them elsewhere. 

An Example is that at another banding station I have worked for many decades, we would get hundreds of Swainson's Thrushes each spring. One spring we did not capture/band maybe 50 % of our average Swainson's Thrushes. But after reaching out to other research/banding stations, we found out that the birds had just migrated a little farther east that year. That was a crazy spring weather season. This shows the value and importance of having multiple research stations and collaboration between them. One station cannot predict bird populations especially in one year's worth of data because weather which is a major factor with where these birds migrate. This could give the wrong impression if only using one season or one year's worth of data. A decade's worth of migratory bird data or more would even/average out the strange weather or other factors during any individual season or year for a better evaluation of bird numbers and behaviors.

Another Example was sometime in the late 1990's (I believe it was 1998), there were tremendous number of fires in southern Mexico/ Central America that year prior to spring migration. The trans-Gulf migrants were extremely late in arriving in northern Ohio that spring. Some were 2 weeks later than normal. Just think about it, these birds had to fly hundreds of miles either over burnt habitats that provided little to no food for them to prepare for the long distance flight across the Gulf or they had to fly around the fires expending lots of energy that they would need to fly the 18-24 hours nonstop across the Gulf. Who knows how many birds never made it back that spring? The migratory songbirds that do not cross the Gulf/migrate up western and Central side of Mexico as well as those species that winter in the Caribbean were not affected as much and pretty much arrived on schedule. 

Also sometime around 2006 or so there was the Horizon oil fires in the Gulf. That also affected those migrants crossing the Gulf that year as well. The wind drift toward the East also curtailed some of the Caribbean wintering species like the Black-throated Blue Warbler.  So, there are usually multiple factors involved with understanding what is happening with our migratory bird populations. 

Hope this addressed some of your questions.

Thanks for the questions and thoughts,

Julie Shieldcastle

Bird Conservancy of the Rockies

On Friday, May 9, 2025 at 8:46:59 PM UTC-4 David Suddjian wrote:

What I wonder is that with various long term reports of many species showing declining trends across many species/habitat groups, and major losses of bird numbers since the 1970s etc., why are we surprised that there are often poor migratory showings? Shouldn't we expect fewer and fewer migrants, even now at what ought to be the peak of a typical migration season? If the reported population declines are as great as those reported, surely we will have fewer birds.  I wonder, as often it seems we think maybe they took another route, or maybe they are just late, or? Are the long term trends that are highlighted in reports of the state of birds wrong? 

Just wondering,

David suddjian

Littleton, CO

On Fri, May 9, 2025 at 1:21 PM Chicobander <jshiel...@gmail.com> wrote:

It was a more beautiful day than yesterday and still no more birds. Makes me wonder if they went up the Central Plains as last week the Birdcast view was lit up from TX to North Dakota with the bird migration forecast. Seems like we should have an overabundance of Orioles and tanagers. Yes, A couple Summer Tanagers were spotted at the Banding station olive grove and at least one at HQ pond. Hoping for improvement in the bird numbers tomorrow. 

We captured two new species for the season: Yellow Warbler and Chipping Sparrow. There was 2 Yellow Warblers captured. One was already banded when we extracted it out of the net. The other we banded today. The banded bird was a second-year male we banded in May of 2023. This bird is four years and counting! Can you imagine a bird that weighs the equivalent of 2 nickels flying to Central America or northern South America for the winter?! This Yellow Warbler has made the round trip twice. So many obstacles these birds can possibly encounter in the skies or while on the ground during migration. This is one of the values of mark from bird banding to learn what these birds are capable of and how long they can live.  When I worked at a bird migration station in NW Ohio. We captured several Yellow Warblers over the years that bred in the vicinity. The oldest individual was an 11 year old female and she was still flying. Other Yellow Warblers returning to NW Ohio were 6 and 7 years old or more. Quite a feat if you ask me for a small bird to travel several thousand miles round trip.

An American Robin we banded at Chico in September 2022 was recovered in Wyola, Montana as reported by the Bird Banding Lab a few weeks ago. Another interesting piece of information, I would not have thought an American Robin would take to the skies for WY. So much to learn about these birds! 

The White-eyed Vireo is still singing around the banding station. We banded in on April 30th. It has not been recaptured since it was banded.

8 New Birds Banded

Yellow Warbler-1

Audubon's (Yellow-rumped) Warbler- 1

Chipping Sparrow-1

Northern House Wren-2

Swainson's Thrush-1

Hermit Thrush-1

Gray Catbird-1

Recapture- Northern House Wren

Return- Yellow Warbler

The banding station will be open tomorrow from Sunrise until @11 AM. The station will be closed on Sunday and reopen on Monday. Remember to sign up on the Aiken Audubon Website (https://www.aikenaudubon.com) if you are planning to visit Chico Basin Ranch.

Have a good day,

Julie Shieldcastle

Chico Basin Ranch Bird Bander

Bird conservancy of the Rockies

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[cobirds] Chico Basin Ranch Banding Station- Bird Conservancy of the Rockies-5/10/2025

Well, let me say when I said yesterday- I hope tomorrow is a better bird day- It most certainly was a better bird DAY!! We caught half of our total birds today in one day since the beginning of this season. Four new species for the year which included Dusky Flycatcher, Northern Waterthrush, Wood Thrush, and Ruby-crowned Kinglet. The Wood Thrush is the 6th Wood thrush banded at Chico and the last time one was banded was in 2012.

36 New Banded Birds-14 species

Audubon's (Yellow-rumped) Warbler- 2

Myrtle (Yellow-rumped) Warbler-1

Yellow Warbler-1

Northern Waterthrush-1

MacGillivray's Warbler-1

Ruby-crowned Kinglet-1

Northern House Wren-3

Dusky Flycatcher-1

Lincoln's Sparrow-2

Swainson's thrush-18

Wood Thrush-1

Gray Catbird-1

Spotted Towhee-1

Brown Thrasher-2

No Recaptures

The banding station will be closed tomorrow and reopen on Monday at sunrise.

Construction will begin again on the educational pavilion on Monday probably after 8:30AM. Please sign up if wanting to bird on the ranch on the Aiken Audubon website (https://www.aikenaudubon.com). The Website also lists the areas open to birding and those which are not.

Not sure exactly how it works when someone asks a question on this site. However, I did respond to David Suddijian's thoughts and questions from yesterday's post.

Have a good weekend,

Julie Shieldcastle

Chico Basin Bird Bander

Bird Conservancy of the Rockies

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Re: [cobirds] Chico Basin Ranch Banding Station Report- Bird Conservancy of the Rockies-5/9/2025

That is a good question. But what needs to be considered also is that weather depicts where these songbirds migrate. Last week there was storms in the eastern Midwest and here in the Western Plains/Colorado area. As I said when you look at Birdcast last week the whole central plains was lit up. The birds that particular night migrated from Texas boot to North Dakota and onto Canada. The best way to assess bird numbers is to have a network of research stations in the different regions of the U.S. and compare what is being observed. I am not going to deny that bird populations are declining. However, we must realize that these birds are fluid and go where the wind takes them. Unless they are breeding species, they may not stop over where they normally do in a certain year/season if weather is pushing them elsewhere. 

An Example is that at another banding station I have worked for many decades, we would get hundreds of Swainson's Thrushes each spring. One spring we did not capture/band maybe 50 % of our average Swainson's Thrushes. But after reaching out to other research/banding stations, we found out that the birds had just migrated a little farther east that year. That was a crazy spring weather season. This shows the value and importance of having multiple research stations and collaboration between them. One station cannot predict bird populations especially in one year's worth of data because weather which is a major factor with where these birds migrate. This could give the wrong impression if only using one season or one year's worth of data. A decade's worth of migratory bird data or more would even/average out the strange weather or other factors during any individual season or year for a better evaluation of bird numbers and behaviors.

Another Example was sometime in the late 1990's (I believe it was 1998), there were tremendous number of fires in southern Mexico/ Central America that year prior to spring migration. The trans-Gulf migrants were extremely late in arriving in northern Ohio that spring. Some were 2 weeks later than normal. Just think about it, these birds had to fly hundreds of miles either over burnt habitats that provided little to no food for them to prepare for the long distance flight across the Gulf or they had to fly around the fires expending lots of energy that they would need to fly the 18-24 hours nonstop across the Gulf. Who knows how many birds never made it back that spring? The migratory songbirds that do not cross the Gulf/migrate up western and Central side of Mexico as well as those species that winter in the Caribbean were not affected as much and pretty much arrived on schedule. 

Also sometime around 2006 or so there was the Horizon oil fires in the Gulf. That also affected those migrants crossing the Gulf that year as well. The wind drift toward the East also curtailed some of the Caribbean wintering species like the Black-throated Blue Warbler.  So, there are usually multiple factors involved with understanding what is happening with our migratory bird populations. 

Hope this addressed some of your questions.

Thanks for the questions and thoughts,

Julie Shieldcastle

Bird Conservancy of the Rockies

On Friday, May 9, 2025 at 8:46:59 PM UTC-4 David Suddjian wrote:

What I wonder is that with various long term reports of many species showing declining trends across many species/habitat groups, and major losses of bird numbers since the 1970s etc., why are we surprised that there are often poor migratory showings? Shouldn't we expect fewer and fewer migrants, even now at what ought to be the peak of a typical migration season? If the reported population declines are as great as those reported, surely we will have fewer birds.  I wonder, as often it seems we think maybe they took another route, or maybe they are just late, or? Are the long term trends that are highlighted in reports of the state of birds wrong? 

Just wondering,

David suddjian

Littleton, CO

On Fri, May 9, 2025 at 1:21 PM Chicobander <jshiel...@gmail.com> wrote:

It was a more beautiful day than yesterday and still no more birds. Makes me wonder if they went up the Central Plains as last week the Birdcast view was lit up from TX to North Dakota with the bird migration forecast. Seems like we should have an overabundance of Orioles and tanagers. Yes, A couple Summer Tanagers were spotted at the Banding station olive grove and at least one at HQ pond. Hoping for improvement in the bird numbers tomorrow. 

We captured two new species for the season: Yellow Warbler and Chipping Sparrow. There was 2 Yellow Warblers captured. One was already banded when we extracted it out of the net. The other we banded today. The banded bird was a second-year male we banded in May of 2023. This bird is four years and counting! Can you imagine a bird that weighs the equivalent of 2 nickels flying to Central America or northern South America for the winter?! This Yellow Warbler has made the round trip twice. So many obstacles these birds can possibly encounter in the skies or while on the ground during migration. This is one of the values of mark from bird banding to learn what these birds are capable of and how long they can live.  When I worked at a bird migration station in NW Ohio. We captured several Yellow Warblers over the years that bred in the vicinity. The oldest individual was an 11 year old female and she was still flying. Other Yellow Warblers returning to NW Ohio were 6 and 7 years old or more. Quite a feat if you ask me for a small bird to travel several thousand miles round trip.

An American Robin we banded at Chico in September 2022 was recovered in Wyola, Montana as reported by the Bird Banding Lab a few weeks ago. Another interesting piece of information, I would not have thought an American Robin would take to the skies for WY. So much to learn about these birds! 

The White-eyed Vireo is still singing around the banding station. We banded in on April 30th. It has not been recaptured since it was banded.

8 New Birds Banded

Yellow Warbler-1

Audubon's (Yellow-rumped) Warbler- 1

Chipping Sparrow-1

Northern House Wren-2

Swainson's Thrush-1

Hermit Thrush-1

Gray Catbird-1

Recapture- Northern House Wren

Return- Yellow Warbler

The banding station will be open tomorrow from Sunrise until @11 AM. The station will be closed on Sunday and reopen on Monday. Remember to sign up on the Aiken Audubon Website (https://www.aikenaudubon.com) if you are planning to visit Chico Basin Ranch.

Have a good day,

Julie Shieldcastle

Chico Basin Ranch Bird Bander

Bird conservancy of the Rockies

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[cobirds] Tennessee Warbler Buena Vista

Hi all, 

We saw a Tennessee Warbler at Columbine Park in Buena Vista this morning. Bird was on the more north side of the park mixed with a flock of yellow-rumps.

https://maps.app.goo.gl/PRuhYXWj4bZfLesA6?g_st=com.google.maps.preview.copy

-Megan Miller, Carly Crow, Adriana Jacobi, and Matt Hazelgren

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[cobirds] Dinosaur Ridge - Denver Field Ornithologists (09 May 2025) 17 Raptors

Dinosaur Ridge - Denver Field Ornithologists
Golden, Colorado, USA

Daily Raptor Counts: May 09, 2025
Species	Day's Count	Month Total	Season Total
Black Vulture	0	0	0
Turkey Vulture	0	6	381
Osprey	0	4	85
Bald Eagle	1	3	47
Northern Harrier	1	4	61
Sharp-shinned Hawk	2	14	357
Cooper's Hawk	2	14	307
American Goshawk	0	0	2
Red-shouldered Hawk	0	0	0
Broad-winged Hawk	1	11	274
Red-tailed Hawk	8	17	521
Rough-legged Hawk	0	0	2
Swainson's Hawk	0	7	45
Ferruginous Hawk	0	0	29
Golden Eagle	0	0	24
American Kestrel	1	14	951
Merlin	1	1	17
Peregrine Falcon	0	0	15
Prairie Falcon	0	0	3
Mississippi Kite	0	0	0
Unknown Accipitrine	0	0	5
Unknown Buteo	0	0	1
Unknown Falcon	0	0	0
Unknown Eagle	0	0	0
Unknown Raptor	0	0	7
Short-eared Owl	0	0	1
Total:	17	95	3135

Observation start time:	08:00:00
Observation end time:	17:00:00
Total observation time:	8.17 hours
Official Counter	1, 2, 3
Observers:	Derek Freed, Jeff Birek, Leslie Dixon, Shannon Campbell

Visitors:
Thank you to today’s volunteers for your help on the ridge! 20 visitors stopped by the site including a group of 10 children with 4 adults.

Weather:
partly cloudy with most of the cumulus clouds to the west over the mountains, serious and serious Stratus clouds overhead extending out into the plains. Light breeze coming from the south east. Good visibility, but pikes Peak is not visible with some haze on the horizon.; partly cloudy with most of the cumulus clouds to the west over the mountains, serious and serious Stratus clouds overhead extending out into the plains. Light breeze coming from the south east. Good visibility, but pikes Peak is not visible with some haze on the horizon.; partly cloudy with most of the cumulus clouds to the west over the mountains, serious and serious Stratus clouds overhead extending out into the plains. Light breeze coming from the south east. Good visibility, but pikes Peak is not visible with some haze on the horizon.; partly cloudy with most of the cumulus clouds to the west over the mountains, serious and serious Stratus clouds overhead extending out into the plains. Light breeze coming from the south east. Good visibility, but pikes Peak is not visible with some haze on the horizon.; Breeze has been slowly shifting and become a bit more gusty. Now out of NE. Cloud cover has slowly increased as well.; Wind is variable NE to E; Wind is variable NE to E; Wind is variable NE to E; Wind is variable NE to E

Raptor Observations:
A few highlights on the day from Jeff Birek- an adult Broad-winged Hawk was the first migrant of the day! He also had a Merlin zip by that according to him was “hard to follow in the scope†. Sounds like a Merlin.

Non-raptor Observations:
Jeff’s full bird list can be found on eBird. He had a Lazuli Bunting, the FOY for the site!

Predictions:
Tomorrow is our last day of the 2025 count season, and we will be taking in all the sun! Warm temps, strong sun, and light winds are gonna leave us tanned and tired for the last day. Our last day just so happens to coincide with Migratory Bird Day. What better way to celebrate than to join us at the migration site!

---

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]

---

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, American White Pelican, and Dusky Grouse. 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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Re: [cobirds] Great Horned Finches at My Feeders Today!!!

For anyone who hasn't seen a Great Horned Finch, I found this one at the Erie Wetlands this evening in Southwest Weld County:
https://macaulaylibrary.org/asset/635408501

Good Birding,
Jeff Percell

Erie, CO

On Wed, May 7, 2025 at 10:49 AM kevygudguy via Colorado Birds <cobirds@googlegroups.com> wrote:

Hello Fellow Birders,

 

Well, actually they're fledgling House Finches.  But their little feather tufts are reminscent of Horned Larks and of course Great Horned Owls!

 

And they're the First-Of-Year fledglings to visit my feeders this Spring.

Keep Smilin',

Kevin

 

Sent from my Remington Rand Typewriter via my Rotary Dial Wall Phone

 

 

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Re: [cobirds] Chico Basin Ranch Banding Station Report- Bird Conservancy of the Rockies-5/9/2025

What I wonder is that with various long term reports of many species showing declining trends across many species/habitat groups, and major losses of bird numbers since the 1970s etc., why are we surprised that there are often poor migratory showings? Shouldn't we expect fewer and fewer migrants, even now at what ought to be the peak of a typical migration season? If the reported population declines are as great as those reported, surely we will have fewer birds.  I wonder, as often it seems we think maybe they took another route, or maybe they are just late, or? Are the long term trends that are highlighted in reports of the state of birds wrong? 

Just wondering,

David suddjian

Littleton, CO

On Fri, May 9, 2025 at 1:21 PM Chicobander <jshieldcastle@gmail.com> wrote:

It was a more beautiful day than yesterday and still no more birds. Makes me wonder if they went up the Central Plains as last week the Birdcast view was lit up from TX to North Dakota with the bird migration forecast. Seems like we should have an overabundance of Orioles and tanagers. Yes, A couple Summer Tanagers were spotted at the Banding station olive grove and at least one at HQ pond. Hoping for improvement in the bird numbers tomorrow. 

We captured two new species for the season: Yellow Warbler and Chipping Sparrow. There was 2 Yellow Warblers captured. One was already banded when we extracted it out of the net. The other we banded today. The banded bird was a second-year male we banded in May of 2023. This bird is four years and counting! Can you imagine a bird that weighs the equivalent of 2 nickels flying to Central America or northern South America for the winter?! This Yellow Warbler has made the round trip twice. So many obstacles these birds can possibly encounter in the skies or while on the ground during migration. This is one of the values of mark from bird banding to learn what these birds are capable of and how long they can live.  When I worked at a bird migration station in NW Ohio. We captured several Yellow Warblers over the years that bred in the vicinity. The oldest individual was an 11 year old female and she was still flying. Other Yellow Warblers returning to NW Ohio were 6 and 7 years old or more. Quite a feat if you ask me for a small bird to travel several thousand miles round trip.

An American Robin we banded at Chico in September 2022 was recovered in Wyola, Montana as reported by the Bird Banding Lab a few weeks ago. Another interesting piece of information, I would not have thought an American Robin would take to the skies for WY. So much to learn about these birds! 

The White-eyed Vireo is still singing around the banding station. We banded in on April 30th. It has not been recaptured since it was banded.

8 New Birds Banded

Yellow Warbler-1

Audubon's (Yellow-rumped) Warbler- 1

Chipping Sparrow-1

Northern House Wren-2

Swainson's Thrush-1

Hermit Thrush-1

Gray Catbird-1

Recapture- Northern House Wren

Return- Yellow Warbler

The banding station will be open tomorrow from Sunrise until @11 AM. The station will be closed on Sunday and reopen on Monday. Remember to sign up on the Aiken Audubon Website (https://www.aikenaudubon.com) if you are planning to visit Chico Basin Ranch.

Have a good day,

Julie Shieldcastle

Chico Basin Ranch Bird Bander

Bird conservancy of the Rockies

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[cobirds] Black-bellied Whistling Ducks/Boulder

Three still at the original location. East Boulder Rec Center. Just south on the grass between 2 ponds.

-----------------------

Rachel Kolokoff Hopper

Follow me on iNaturalist
rkhphotography.net
hopko@comcast.net
Ft. Collins, CO

[cobirds] Chatfield Banding Station - Bird Conservancy of the Rockies 5/9/25

We had a better morning today - the best day of the season so far.  16 new birds plus 2 returns, 11 species.  Evergreen Audubon spent the early morning with us and got to see one of each of our most commonly caught species this time of year!

Yellow Warblers led this morning's collection; 3 new, 2 returns and 1 recap, all adult males - exactly what we would expect at this time of year.  One of the returns was banded in 2022 as an adult male and recaught in both 2023 and 2024; this is definitely his breeding grounds!

Here's the breakdown of the 18 new birds today:

Black-capped Chickadee 1

White-breasted Nuthatch 1

Northern House Wren 3

Gray Catbird 2

Orange-crowned Warbler 1

Yellow Warbler 3 new, 2 returns (1 banded in 2022, 1 in 2024)

Common Yellowthroat 1

Yellow-breasted Chat 1

Spotted Towhee 1

Song Sparrow 1

White-crowned Sparrow, Gambel's 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 occasional weekdays through the Denver Audubon website.  (Some days 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] White Eyed Vireo - Westminster - Dry Creek

All:

          Found a White-Eyed Vireo along Dry Creek in Westminster about 9 am this morning.    It was actively singing, giving alarm calls, and foraging for insects.  

Directions:  From Metzger Farm Open Space, off Lowell near 120th:  From the main parking lot, follow the main trail east past the lake.   Dry Creek does a big "S" turn here.  Walk over the wood footbridge and search the area to the north that juts out into the "S" curve.  The bird was in a small apple tree adjoining the creek.  

Warning:  watch out for cactus and rattlesnakes if you step off the path.  

White-eyed vireos are very furtive, and this bird was no exception, constantly diving into thickets and dense bushes along the creek.   The song \ calls are very unique, which was what alerted me to its presence.  

Other species seen along Dry Creek Westminster, from Big Dry Creek Park (128th near Zuni) over to Metzger Farm Open Space. 

Great Blue Heron - 2

Double Crested Cormorant - 1 flyover

Mallard - numerous

Red Tailed Hawk - 2 - soaring

Cooper's Hawk - 1 - being harassed by magpies

Killdeer - only 1

Mourning dove - 12

Eurasian Collared Dove - 10

Northern Flicker - 5

Say's Phoebe - 8

Western Kingbird - 6 - numbers increasing

WHITE EYED VIREO - as mentioned above

Yellow Breasted Chat - 3 - all singing

Gray Catbird - 3 - songs and visuals

Blue Jay - about 20

Black Billed Magpie - 25 - numbers increase around Metzger Farm

Barn Swallow - 14 

Northern Rough Winged Swallow - 2 perched

Cliff Swallow - 100+ - near underpasses, already at or in nests

Black Capped Chickadee - 4

House Wren - 11 all singing - NOTE:  house wrens have been pouring up the Platte River, Boulder Creek, and Dry Creek drainages over the last 2 weeks.  

Blue Gray Gnatcatcher - only 1 female

American Thrush (American Robin) - dozens

European Starling - about 50+

Song Sparrow - 12

Western Meadowlark - 6 all singing

Red Winged Blackbird - numerous

Common Grackle - 30 

Brown Headed Cowbird - 15 - numbers increasing

Bullock's Oriole - breeding plumage male, only 1

American Goldfinch - 6

Conspicuously absent - no warblers!

Herps:  Snakes are out:

Bullsnake

Plains Garter Snake

Western Painted Turtle

Bullfrog

Chorus Frogs

Good luck, 

John T (Tumasonis), Broomfield CO

"I'm not a real birder.  I only pretend to be one on CoBirds." 

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[cobirds] Dinosaur Ridge - Denver Field Ornithologists (08 May 2025- Yesterday's report) 6 Raptors

Dinosaur Ridge - Denver Field Ornithologists
Golden, Colorado, USA

Daily Raptor Counts: May 08, 2025
Species	Day's Count	Month Total	Season Total
Black Vulture	0	0	0
Turkey Vulture	0	6	381
Osprey	1	4	85
Bald Eagle	0	2	46
Northern Harrier	0	3	60
Sharp-shinned Hawk	2	12	355
Cooper's Hawk	0	12	305
American Goshawk	0	0	2
Red-shouldered Hawk	0	0	0
Broad-winged Hawk	0	10	273
Red-tailed Hawk	0	9	513
Rough-legged Hawk	0	0	2
Swainson's Hawk	1	7	45
Ferruginous Hawk	0	0	29
Golden Eagle	0	0	24
American Kestrel	2	13	950
Merlin	0	0	16
Peregrine Falcon	0	0	15
Prairie Falcon	0	0	3
Mississippi Kite	0	0	0
Unknown Accipitrine	0	0	5
Unknown Buteo	0	0	1
Unknown Falcon	0	0	0
Unknown Eagle	0	0	0
Unknown Raptor	0	0	7
Short-eared Owl	0	0	1
Total:	6	78	3118

Observation start time:	09:00:00
Observation end time:	17:00:00
Total observation time:	8 hours
Official Counter	Emma Riley
Observers:	Chip Dawes, Jim Lowe

Visitors:
*Our apologies in the delayed report email!* Thank you to Chip Dawes for volunteering as a spotter today! It is always a pleasure having you on the ridge. We also had a visit from Jim Lowe. Jim is from Minnesota, and our counter Emma met him when she was working at Hawk Ridge Bird Observatory in 2021. He spent the morning looking for migrants with us and catching up! It's always great to see familiar faces on the ridge. Despite the nice weather, the trail was pretty empty. 9 people stopped by the ridge today to check out the count board and ask a question or two.

Weather:
The rain finally lifted today, leaving clear blue skies behind it for most of the day. The sun was strong and temperatures rised quickly. Some precipitation could be seen W and SE of us late in the day, but we only felt a few gusts of wind from the W in it all.

Raptor Observations:
We hoped to see a bigger push of migrants today after the storm but alas. After having such a fantastic season it is proving difficult to accept the end of it! We did have a few migrants, including a juvenile Swainson's Hawk that came low overhead. An Osprey also came by W of us in the afternoon. Local Red-tailed Hawks and Turkey Vultures continue to dominate the skies, especially in the nicer weather. Birds were active from the moment we arrived to the moment we left. Most birds were seen soaring or actively hunting while kiting or from a perch. Four Coopers Hawks were all seen circling around the Apex Houses before flying directly SW. Unusual (for this site) CH activity continues!

Non-raptor Observations:
Passerine movement was also a bit slower than expected yesterday, but we got started later than we would have liked to. We did have four sightings of a Western Kingbird throughout the day, with all of four of them moving N! One did perch in a nearby snag for a moment before continuing on. In the last hour of the day we had group after group of White-throated Swifts fly N directly overhead. White-throated Swift 61, Broad-tailed Hummingbird 2, American White Pelican 8, Western Kingbird 4, Black-billed Magpie 2, Common Raven 1, Black-capped Chickadee 1, Tree Swallow 14, Violet-green Swallow 34, Barn Swallow 1, Cliff Swallow 10, Blue-grey Gnatcatcher 3, American Robin 3, House Finch 2, Spotted Towhee 3, Western Meadowlark 1, Yellow-rumped Warbler (Audubon's) 1, passerine sp. 1

Predictions:
Conditions look good for a small push of migrants if there are any left in the area. Jeff Birek will be counting tomorrow! Jeff has worked as the volunteer coordinator for Dinosaur Ridge when Bird Conservancy of the Rockies was managing this site. He's an excellent hawk watcher and biologist, so come say hi to him!

---

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]

---

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, American White Pelican, and Dusky Grouse. 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] Mississippi Kite, Fort Collins, Larimer

Hello co-birders, 

Sorry for the late report but this was not really a chaseable bird. 

Yesterday evening (May 8) around 5:30, I watched a Mississippi Kite fly slowly northward in Fort Collins, near the intersection of Country Club and Ridgecrest roads. It was a couple hundred yards away and I first mistook it for a harrier, but the tail was too long, tried to turn it into a cooper's hawk, but then noticed the slow graceful wingbeats and buoyant flight. At one point it even flew straight up vertically what seemed like about 50 ft, perhaps to grab a snack, before dropping back down and continuing its flight.  It flew off towards Terry Lake.

Also in a yard here at about the same time was an Olive-sided Flycatcher.

Cheers,

Arvind Panjabi 

Fort Collins, CO

[cobirds] Chico Basin Ranch Banding Station Report- Bird Conservancy of the Rockies-5/9/2025

It was a more beautiful day than yesterday and still no more birds. Makes me wonder if they went up the Central Plains as last week the Birdcast view was lit up from TX to North Dakota with the bird migration forecast. Seems like we should have an overabundance of Orioles and tanagers. Yes, A couple Summer Tanagers were spotted at the Banding station olive grove and at least one at HQ pond. Hoping for improvement in the bird numbers tomorrow. 

We captured two new species for the season: Yellow Warbler and Chipping Sparrow. There was 2 Yellow Warblers captured. One was already banded when we extracted it out of the net. The other we banded today. The banded bird was a second-year male we banded in May of 2023. This bird is four years and counting! Can you imagine a bird that weighs the equivalent of 2 nickels flying to Central America or northern South America for the winter?! This Yellow Warbler has made the round trip twice. So many obstacles these birds can possibly encounter in the skies or while on the ground during migration. This is one of the values of mark from bird banding to learn what these birds are capable of and how long they can live.  When I worked at a bird migration station in NW Ohio. We captured several Yellow Warblers over the years that bred in the vicinity. The oldest individual was an 11 year old female and she was still flying. Other Yellow Warblers returning to NW Ohio were 6 and 7 years old or more. Quite a feat if you ask me for a small bird to travel several thousand miles round trip.

An American Robin we banded at Chico in September 2022 was recovered in Wyola, Montana as reported by the Bird Banding Lab a few weeks ago. Another interesting piece of information, I would not have thought an American Robin would take to the skies for WY. So much to learn about these birds! 

The White-eyed Vireo is still singing around the banding station. We banded in on April 30th. It has not been recaptured since it was banded.

8 New Birds Banded

Yellow Warbler-1

Audubon's (Yellow-rumped) Warbler- 1

Chipping Sparrow-1

Northern House Wren-2

Swainson's Thrush-1

Hermit Thrush-1

Gray Catbird-1

Recapture- Northern House Wren

Return- Yellow Warbler

The banding station will be open tomorrow from Sunrise until @11 AM. The station will be closed on Sunday and reopen on Monday. Remember to sign up on the Aiken Audubon Website (https://www.aikenaudubon.com) if you are planning to visit Chico Basin Ranch.

Have a good day,

Julie Shieldcastle

Chico Basin Ranch Bird Bander

Bird conservancy of the Rockies

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[cobirds] Pair of Mississippi Kites at Arsenal, Adams county

Today at around 9:20 am there were 2 Mississippi Kites perched near each other in a small cottonwood on the south side of the road just past the bathroom structure. They stayed long enough to show how they fly for insects, then about an hour later were circling together above the Woodland Trail. I see that Frank Farrell reported them yesterday near Lake Mary. Tim and I have never seen them before at the Arsenal.

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Re: [cobirds] Lucy’s Warbler El Paso County

Has anyone seen/heard it today? Nothing so far on eBird. Thanks!

On Thu, May 8, 2025 at 2:13 PM SnB <weperegrini@gmail.com> wrote:

A singing Lucy's Warbler was found this morning at the Adam's Open Space, Fountain, El Paso County. It is a hard bird to find but for its fairly consistent song. It is hanging up high in the canopy. Numerous folks obtained photos and recordings. This is the second year in a row a Lucy's has been found in El Paso. 

Scott Shaum

Woodland Park CO

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Re: [cobirds] lazuli bunting, Larimer County, 5/3

I have also had one yesterday and today on a bird feeder. I only get them passing through in Niwot. 

Sent from my iPhone

Elena Holly Klaver

Federally Certified Court Interpreter

Conference Interpreter

English <> Spanish

303 475 5189

Member: American Translators Association

Colorado Translators Association 

Pronouns: she, her, hers

I acknowledge that I live in the territory of Hinóno'éí (Arapaho), Cheyenne and Ute Nations, according to the 1851 Treaty of Fort Laramie, and that Colorado's Front Range is home to many Native peoples. Reconozco que vivo en el territorio de las naciones Hinóno'éí (Arapaho), Cheyenne y Ute, según el Tratado de Fort Laramie en 1851, y que el estado de Colorado al esté de las Montañas Rocosas es territorio de muchos pueblos indígenas. 

On May 8, 2025, at 9:23 PM, 'Jim Tyler' via Colorado Birds <cobirds@googlegroups.com> wrote:

 I typically have one LB that feeds late afternoon / early evening at a no-mess caged feeder. It sits at the bottom of the cage and feds from one of the bottom feeder slots.

He showed up here 3 days ago - wonderful to see him back.

Jim Tyler
Roxborough

On 5/8/2025 8:55 PM, 'Buzz Schaumberg' via Colorado Birds wrote:

I have had one on my birdbath for 2 days, in East Aurora, about 2 miles East of Cherry Creek State Park. Also a male Black- headed Grosbeak .

Sent from the all new Aol app for iOS

Buzz Schaumberg 

On Thursday, May 8, 2025, 6:18 PM, Raymond Davis <davisblackdog@gmail.com> wrote:

Posting this cuz' it seems early.   My wildlife camera caught a Lazuli bunting at the water on

May 3rd, 7:39 am

Davis - southern Larimer county by 200 feet., Lyons

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Re: [cobirds] YELLOW GROSBEAK in Bennett

I don't know if this is the same bird, but we had a yellow grosbeak stop briefly at a cage feeder two days ago and fly away to the north.

Jim Tyler
Roxborough

On 5/8/2025 3:26 PM, Archer Silverman wrote:

Cobirders, I currently have the Yellow Grosbeak reported on Facebook earlier today. Currently, the homeowner is not home. You can view it by scoping on the side of the road here 

(39.6814199, -104.4157047), which is what we are doing.

-Archer Silverman, Denver

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Re: [cobirds] lazuli bunting, Larimer County, 5/3

I typically have one LB that feeds late afternoon / early evening at a no-mess caged feeder. It sits at the bottom of the cage and feds from one of the bottom feeder slots.

He showed up here 3 days ago - wonderful to see him back.

Jim Tyler
Roxborough

On 5/8/2025 8:55 PM, 'Buzz Schaumberg' via Colorado Birds wrote:

I have had one on my birdbath for 2 days, in East Aurora, about 2 miles East of Cherry Creek State Park. Also a male Black- headed Grosbeak .

Sent from the all new Aol app for iOS

Buzz Schaumberg 

On Thursday, May 8, 2025, 6:18 PM, Raymond Davis <davisblackdog@gmail.com> wrote:

Posting this cuz' it seems early.   My wildlife camera caught a Lazuli bunting at the water on

May 3rd, 7:39 am

Davis - southern Larimer county by 200 feet., Lyons

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[cobirds] Chatfield Banding Station - Bird Conservancy of the Rockies 5/8/25

Like Chico, we banded 5 new birds today.  Plus caught 1 banded last year for 6 new birds this morning:

White-breasted Nuthatch 1

Gray Catbird 1 return, banded last year

Yellow Warbler 2

Lincoln's Sparrow 1

Red-winged Blackbird 1

I've tried to think of something useful to say about this lack of migrants at our banding stations, but I can't.  Yet.  Continue to monitor........

We are banding Tuesday through Sunday (closed Mondays) through May 31, weather permitting.  There are opportunities for the public to visit on weekends and occasional weekdays through the Denver Audubon website.  (Some days are already sold out, so sign up now if you are interested!)

Meredith McBurney

Bander

Bird Conservancy of the Rockies

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Re: [cobirds] lazuli bunting, Larimer County, 5/3

I have had one on my birdbath for 2 days, in East Aurora, about 2 miles East of Cherry Creek State Park. Also a male Black- headed Grosbeak .

Sent from the all new Aol app for iOS

Buzz Schaumberg 

On Thursday, May 8, 2025, 6:18 PM, Raymond Davis <davisblackdog@gmail.com> wrote:

Posting this cuz' it seems early.   My wildlife camera caught a Lazuli bunting at the water on

May 3rd, 7:39 am

Davis - southern Larimer county by 200 feet., Lyons

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