cobirds colorado rare bird: April 2021

Friday 30 April 2021

[cobirds] Green Heron Westminster

Sorry this is a late post, but we (Robyn and I) observed a Green Heron
in the small pond that is below the back parking lot of Front Range
Community College (Adams County) on Wednesday, April 28. I had seen it
the evening before, but haven't seen it again while looking yesterday
and today. A photo is attached.

Jeremy Winick
Westminster, Adams County

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[cobirds] Dinosaur Ridge - Denver Field Ornithologists (30 Apr 2021) 27 Raptors

Dinosaur Ridge - Denver Field Ornithologists
Colorado, USA

Daily Raptor Counts: Apr 30, 2021
Species	Day's Count	Month Total	Season Total
Black Vulture	0	0	0
Turkey Vulture	10	146	149
Osprey	1	26	26
Bald Eagle	0	8	21
Northern Harrier	0	4	4
Sharp-shinned Hawk	4	112	126
Cooper's Hawk	1	87	98
Northern Goshawk	0	6	10
Red-shouldered Hawk	0	0	0
Broad-winged Hawk	1	30	30
Red-tailed Hawk	5	153	346
Rough-legged Hawk	0	0	1
Swainson's Hawk	2	10	10
Ferruginous Hawk	0	2	9
Golden Eagle	0	3	9
American Kestrel	0	117	119
Merlin	0	8	12
Peregrine Falcon	1	7	11
Prairie Falcon	0	21	22
Mississippi Kite	0	0	0
Unknown Accipiter	0	10	11
Unknown Buteo	0	9	18
Unknown Falcon	2	5	7
Unknown Eagle	0	0	0
Unknown Raptor	0	4	7
Total:	27	768	1046

Observation start time:	08:30:00
Observation end time:	15:00:00
Total observation time:	6.5 hours
Official Counter	Dave Hill, Steve Small
Observers:	Bea Weaver, Carol Cwiklinski, Cynthia Madsen, Debbie James

Visitors:
Bill King observed with us from 11:00AM to 11:40 AM/

Weather:
Sunny, blue skies all day. Temperature: 55-74Â°F. Wind: NE @ 48 mph, gusting to 13 mph.

Raptor Observations:
MIGRANTS 10 Turkey Vultures 1 Osprey 4 Sharp-shinned Hawk 1 Cooper's Hawk 1 Broad-winged Hawk 2 Swainson's Hawk 5 Red-tailed Hawk 1 Peregrine Falcon 1 large falcon species 1 small falcon species LOCAL BIRDS: 1 Turkey Vulture 3 Red-tailed Hawk 1 Peregrine Falcon

Non-raptor Observations:
2 American White Pelican 1 Blue Jay 1 Woodhouse's Scrub-Jay 3 Black-billed Magpie 2 American Crow 3 Common Raven 5 Black-capped Chickadee 1 Mountain Chickadee 1 Red-breasted Nuthatch 4 European Starling 1 Townsend's Solitaire 1 American Robin 4 House Finch 2 Dark-eyed Junco 1 Spotted Towhee 1 Western Meadowlark

Predictions:
Another warm day, light winds, and mostly sunny with a high of 84Â°F.

Report submitted by DAVID HILL ()
Dinosaur Ridge - Denver Field Ornithologists information may be found at: http://www.dfobirds.org
More information at hawkcount.org: [Site Profile] [Day Summary] [Month Summary]

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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[cobirds] Caspian tern Boulder County

Still present on the north shore in the area protected by long string of buoys at Lake McIntosh at 6:45 on 4-30-21. Here comes May at long last! Good birding. Bill Fink. Longmont

Sent from my iPhone

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[cobirds] Re: RFI: Gray Vireo - close to I-70

Hi Steve!

Gray Vireo is a fairly reliable species in Colorado National Monument, like you said. The place I have had the most luck is on the small trail that goes to the west and north from the Devil's Kitchen Picnic Area. Early mornings are typically the best time to visit as it can get fairly warm pretty quickly around there. But I have seen them at various times throughout the day.

Best of luck to you! That's a great streak to keep alive.

Steve Rash

Denver, CO

On Friday, April 30, 2021 at 1:55:16 PM UTC-6 steveh...@gmail.com wrote:

We are travelling cross-county during the week of June 7th and will be travelling east through western Colorado on I-70. Does anyone have any tips for finding Gray Vireo west of Grand Junction? I know on eBird that the Colorado National Monument Visitor's center and Rabbit Valley are good places to look, but was hoping for more details from a local.

I've had at least one life bird in the ABA area each year since I started birding in 1986, I'm hoping to keep the streak alive and GRVI seems like a good target for the trip.

Thanks in advance,
Steve Holzman
South Beach, OR

[cobirds] Hummers

FOY 2 Broad-tailed hummers today in Allenspark😊

Robin Jasper
Boulder Bounty

Sent from my iPhone

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[cobirds] Arapahoe / JeffCo Non-Birding Bird Sightings

Haven't been birding, but still listening and looking...

I heard my FOY House Wren from my Centennial, CO yard (Arapahoe Co) this morning (4/30). A White-crowned Sparrow was also around.

Yesterday, at Lair o' the Bear Park in Jefferson County, a Steller's Jay was a fun sighting. But an old hummingbird nest, right on the trailhead for the creek trail and low (3.5-4' off the ground) was the real treasure. (I should have noted the plant, but I was so enamored by the nest.) Also, a few butterflies -- a Mourning Cloak and what appeared to be some sort of Fritillary.

Finally, to add a bit on the bluebird conversation, a recent post to the Wisconsin state birding email list addressed the dearth of Eastern Bluebirds up there this spring.

- Jared

[cobirds] Bird Conservancy of the Rockies - Chatfield Banding Report 4/29 & 30

Two of the slowest days ever, in probably the slowest week ever for spring migration here. I hope migration is just late, or we are in for a dreary season!

Yesterday (Thursday) we banded 4 birds and had one return:

Black-capped Chickadee 1

White-breasted Nuthatch 1

Song Sparrow 1, banded 2018

Dark-eyed Junco, Oregon 1

Dark-eyed Junco, Pink-sided 1

Today (Friday) we banded only 3 birds, but at least had a migrant:

Common Yellowthroat 1 (like Steve Brown, this was a late first arrival for this species)

Song Sparrow 1

Dark-eyed Junco, Pink-sided 1

We are open six days per week (closed Tuesdays) through May 30. While some COVID related restrictions remain in place, there are opportunities most mornings for the public to visit, but reservations are required. Visit https://denveraudubon.org/events/ for more information and to sign-up. Because each hour-long session is limited to 10 people, we anticipate selling out most mornings, so register soon if you are interested!

Meredith McBurney
Bander, Chatfield Station
Bird Conservancy of the Rockies

[cobirds] Two FOY year birds near Storm Mountain, Larimer Cty.

Hi CObirders, we had a FOY Broad-tailed hummingbird here this morning and two Violet-green swallows! And not a cloud in the sky here – Dave Hyde/nr. Storm Mountain/Larimer Cty.

Sent from Mail for Windows 10

Re: [cobirds] Re: FOY Common Yellowthroat, CSR, El Paso Co, Thurs

Chiming in again about COYE…. migrants may well be by-passing us, but COYE is an abundant nesting species at CSR. Usually the place is cacophonous with their songs. I've seen one male so far, and only for about 2 minutes. No others have arrived here yet. Same for House Wrens, they are thick nesting here, and I've seen one or two so far.

And an FOY Chipping Sparrow today - but they are usual after May 1 here. (Last year I had "0" in April, and 90 on May 2!!!). Other than that - with the forecast for lots of migrant passing over CO last night - it was obvious NONE of the stopped at CSR!!! I caught 4 birds today, 2 of them recaptured White-crowns banded earlier.

Sigh.

Steve Brown

COS

On Apr 30, 2021, at 8:50 AM, Diana Beatty <otowi33.33@gmail.com> wrote:

FWIW, I keep track of some weather data, plants blooming, etc., and spring is late this year in my yard. Plants are blooming behind schedule multiple weeks late, first sightings of all kinds of wildlife, not just birds, is later, temperatures have been cooler all spring on average than other recent years, etc.

Diana Beatty
El Paso County

On Fri, Apr 30, 2021 at 8:42 AM 'The Nunn Guy' via Colorado Birds <cobirds@googlegroups.com> wrote:
Hi all

I wonder if answer is as simple (of complex) as maybe migrating birds simply not stopping in Colorado, drought, loss of habitat in Colorado, taking different paths, weather challenges, lack of food sources, other???

<flyway.JPG>

Also, a study (2019) released in the journal Nature Climate Change suggests "that rising temperatures are causing birds to migrate a little earlier each spring. It finds that the journey home is shifting forward by a little less than two days each decade. The researchers, led by Kyle Horton of Colorado State University, analyzed millions of radar scans collected between 1995 and 2018. They used a high-tech method to differentiate between migrating birds and weather systems—a special type of artificial intelligence known as a neural network. Neural networks rely on complex sets of algorithms and can be trained to recognize patterns in data."

Sort of suggests we should be seeing migrating birds earlier than anticipated.

Thanks, Gary Lefko, Nunn
http://www.friendsofthepawneegrassland.org/
https://www.inaturalist.org/projects/birds-and-more-of-the-pawnee-national-grassland

On Thursday, April 29, 2021 at 11:48:33 AM UTC-6 Steve wrote:
Hey COBirders,

No big news for Clear Spring Ranch banding today, except that among the very few birds banded today was my FOY Common Yellowthroat, Ad Male. This is not rare, but what is unusual is that this is by far the latest for my FOY at CSR. I usually catch them starting Day One, around 4/20. Migration is delayed here, for whatever reason.

So far in a week I've banded 60 birds, 1/2 of which are White-crowned Sparrows that winter here and will be leaving soon. 3 Ruby-crowned Kinglets, 1 Audubon's Warbler, 1 Wilson's Warbler, 10 Lincoln's Sparrows.
1 House Wren. Pretty slow to date.

A cool sighting for me, though, was a large flock of American Pipits (50+) all over a hayfield that was freshly disked yesterday. And I think one was a victim of the resident Am Kestrel, as one was feeding on the ground out there, and nothing else was in the field except Mourning Doves.

On the way out, the 20 White-faced Ibis and 2 Long-billed Curlew were present by the entrance road. That's cool.

Steve Brown
Colo Spgs

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All that is gold does not glitter, not all those who wander are lost; the old that is strong does not wither, deep roots are not reached by the frost.

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[cobirds] RFI: Gray Vireo - close to I-70

We are travelling cross-county during the week of June 7th and will be travelling east through western Colorado on I-70. Does anyone have any tips for finding Gray Vireo west of Grand Junction? I know on eBird that the Colorado National Monument Visitor's center and Rabbit Valley are good places to look, but was hoping for more details from a local.

I've had at least one life bird in the ABA area each year since I started birding in 1986, I'm hoping to keep the streak alive and GRVI seems like a good target for the trip.

Thanks in advance,
Steve Holzman
South Beach, OR

Re: [cobirds] Re: FOY Common Yellowthroat, CSR, El Paso Co, Thurs

FWIW, I keep track of some weather data, plants blooming, etc., and spring is late this year in my yard. Plants are blooming behind schedule multiple weeks late, first sightings of all kinds of wildlife, not just birds, is later, temperatures have been cooler all spring on average than other recent years, etc.

Diana Beatty

El Paso County

On Fri, Apr 30, 2021 at 8:42 AM 'The Nunn Guy' via Colorado Birds <cobirds@googlegroups.com> wrote:

Hi all

I wonder if answer is as simple (of complex) as maybe migrating birds simply not stopping in Colorado, drought, loss of habitat in Colorado, taking different paths, weather challenges, lack of food sources, other???

Also, a study (2019) released in the journal Nature Climate Change suggests "that rising temperatures are causing birds to migrate a little earlier each spring. It finds that the journey home is shifting forward by a little less than two days each decade. The researchers, led by Kyle Horton of Colorado State University, analyzed millions of radar scans collected between 1995 and 2018. They used a high-tech method to differentiate between migrating birds and weather systems—a special type of artificial intelligence known as a neural network. Neural networks rely on complex sets of algorithms and can be trained to recognize patterns in data."

Sort of suggests we should be seeing migrating birds earlier than anticipated.

Thanks, Gary Lefko, Nunn
http://www.friendsofthepawneegrassland.org/
https://www.inaturalist.org/projects/birds-and-more-of-the-pawnee-national-grassland

On Thursday, April 29, 2021 at 11:48:33 AM UTC-6 Steve wrote:
Hey COBirders,

No big news for Clear Spring Ranch banding today, except that among the very few birds banded today was my FOY Common Yellowthroat, Ad Male. This is not rare, but what is unusual is that this is by far the latest for my FOY at CSR. I usually catch them starting Day One, around 4/20. Migration is delayed here, for whatever reason.

So far in a week I've banded 60 birds, 1/2 of which are White-crowned Sparrows that winter here and will be leaving soon. 3 Ruby-crowned Kinglets, 1 Audubon's Warbler, 1 Wilson's Warbler, 10 Lincoln's Sparrows.
1 House Wren. Pretty slow to date.

A cool sighting for me, though, was a large flock of American Pipits (50+) all over a hayfield that was freshly disked yesterday. And I think one was a victim of the resident Am Kestrel, as one was feeding on the ground out there, and nothing else was in the field except Mourning Doves.

On the way out, the 20 White-faced Ibis and 2 Long-billed Curlew were present by the entrance road. That's cool.

Steve Brown
Colo Spgs

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******

All that is gold does not glitter, not all those who wander are lost; the old that is strong does not wither, deep roots are not reached by the frost.

[cobirds] Re: FOY Common Yellowthroat, CSR, El Paso Co, Thurs

Hi all

I wonder if answer is as simple (of complex) as maybe migrating birds simply not stopping in Colorado, drought, loss of habitat in Colorado, taking different paths, weather challenges, lack of food sources, other???

Also, a study (2019) released in the journal Nature Climate Change suggests "that rising temperatures are causing birds to migrate a little earlier each spring. It finds that the journey home is shifting forward by a little less than two days each decade. The researchers, led by Kyle Horton of Colorado State University, analyzed millions of radar scans collected between 1995 and 2018. They used a high-tech method to differentiate between migrating birds and weather systems—a special type of artificial intelligence known as a neural network. Neural networks rely on complex sets of algorithms and can be trained to recognize patterns in data."

Sort of suggests we should be seeing migrating birds earlier than anticipated.

Thanks, Gary Lefko, Nunn

http://www.friendsofthepawneegrassland.org/

https://www.inaturalist.org/projects/birds-and-more-of-the-pawnee-national-grassland

On Thursday, April 29, 2021 at 11:48:33 AM UTC-6 Steve wrote:

Hey COBirders,

No big news for Clear Spring Ranch banding today, except that among the very few birds banded today was my FOY Common Yellowthroat, Ad Male. This is not rare, but what is unusual is that this is by far the latest for my FOY at CSR. I usually catch them starting Day One, around 4/20. Migration is delayed here, for whatever reason.

So far in a week I've banded 60 birds, 1/2 of which are White-crowned Sparrows that winter here and will be leaving soon. 3 Ruby-crowned Kinglets, 1 Audubon's Warbler, 1 Wilson's Warbler, 10 Lincoln's Sparrows.
1 House Wren. Pretty slow to date.

A cool sighting for me, though, was a large flock of American Pipits (50+) all over a hayfield that was freshly disked yesterday. And I think one was a victim of the resident Am Kestrel, as one was feeding on the ground out there, and nothing else was in the field except Mourning Doves.

On the way out, the 20 White-faced Ibis and 2 Long-billed Curlew were present by the entrance road. That's cool.

Steve Brown
Colo Spgs

Thursday 29 April 2021

[cobirds] Re: SE Colo 4/25 to 28

Great detailed report Dan! Much appreciated.

Interesting to hear how dry it is. I've heard the same from others.

Rob Raker

Lakewood, CO

On Wednesday, April 28, 2021 at 7:55:41 PM UTC-6 Dan Stringer wrote:

I went to SE Colorado with Michael Kiessig and Chuck Aid Sunday the 25th through today. Here's some info on how spring is progressing, in case anyone will be going there soon.

In Bent County, Hasty Campground area was active with Chipping, Vesper, and Lark Sparrows, American Goldfinches, only 2 Western Kingbirds, only 1 Mountain Bluebird on the road in. Many Yellow-rumped Warblers, mostly Myrtle, one early Yellow Warbler and one Wilson's. Melody Tempel Grove was very quiet, the irrigation ditch is dry. The south shore of Adobe Creek Reservoir had 10 shorebird species, 51 Marbled Godwits being the highlight.

In Kiowa County, Neegronda and Neenoshe reservoirs had few shorebirds, Upper Queens boat ramp area hosted 6 shorebird species, with an eye-opening 108 American Avocets shoulder-to-shoulder. Lower Queens reservoir was dry.

In Otero County, I saw shoreline at Lake Cheraw for the first time in 4 years, there were 9 shorebird species including 2 Snowy Plovers, and a good number of Yellow-headed Blackbirds which seem to have shown up late this year. Holbrook Reservoir was bone dry, Rocky Ford SWA was very quiet.

In Prowers County, Thurston Reservoir had no shoreline, good numbers of birds on the water and 5 swallow species. Lamar CC Woods early a.m. hosted Brandon Percival therefore it was productive, 2 vocal Carolina Wrens, 1 carrying nest material, were the highlight of my 4 days. A Common Poorwill, a Black-chinned Hummingbird, a few Chimney Swifts, only 1 Mississippi Kite so far, numerous Northern Cardinals, warblers were many Yellow-rumped, mostly Audubon, several Orange-crowned, 1 Yellow, 3 Wilson's, 1 Virginia's, 1 Nashville, 1 Northern Parula on the north end and 1 on the south end.

In Baca County, on Road M 1 Common Nighthawk was heard, in Carrizo Canyon were 2 pair of Eastern Phoebe nest-building and the usual area specialties. Two Buttes Reservoir was completely dry, the Black Hole area below in hot mid-afternoon was very quiet.

There were more dry areas than I've seen before, from small ditches / ponds / playas to large reservoirs, the years-long drought is continuing and the moisture on the front range etc. is repeatedly not making it down there. It's early for warblers, vireos, and many other birds but it's pretty fun to observe that the switch is being slowly flipped and there are daily changes in trees, plants, insects, and birds.

Dan Stringer
Larkspur, CO

[cobirds] timing for cliff swallows showing up in Fairplay this year?

Anyone have an idea/estimate when the cliff swallows might be showing up and beginning to build their nests this year in Fairplay? Any help appreciated. Thanks.

Michael Lee Jones

Certified Senior Ecologist
High Prairie Environmental LLC

[cobirds] Fwd: Millions of Birds Over Colorado Tonight - Lights Out!

Encourage you and your friends and neighbors for LIGHTS OUT! this bird migration season. Great new initiative by Audubon Rockies, International Dark-sky Association Colorado chapter and Denver Audubon!

_________________________

Please Note the "E" in my email address below, and make sure it's correct in your address book.

Scott E. Severs
ScottESevers@gmail.com
Longmont, CO

Turn off your lights to help them migrate safely.

Trouble viewing this e-mail? Try our web version.

Lights Out Colorado

Dear Scott,

Have you seen the bird migration forecast? Colorado's about to get a LOT of birds. MILLIONS of birds. Spring migration is approaching its peak, and the birds passing through need your help.

Each year, up to one billion birds are killed as a result of light pollution. You see, most birds migrate at night, and artificial light attracts and disorients them, causing them to collide with buildings or exhaust themselves in confusion.

But a new program is here to help! In partnership with the International Dark-sky Association Colorado chapter and Denver Audubon, we're launching Lights Out Colorado to provide information, resources, and opportunities for helping birds migrate safely through our state.

The easiest way you can help is by turning off your lights by midnight from now until May and shielding outdoor lights to prevent light from being emitted upwards. There are also ways you can make a bigger impact, such as by contacting your local government.

To get started, take the Lights Out Colorado pledge!

Take the Pledge

Tune in to our Facebook Live video today at 5 pm for a live forecast from Community Naturalist Zach Hutchinson!

Yellow-rumped Warbler. Photo: Evan Barrientos/Audubon Rockies. Forecast: CSU Aeroecolab

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