Saturday 30 April 2022

[cobirds] Dinosaur Ridge - Denver Field Ornithologists (30 Apr 2022) 24 Raptors

Dinosaur Ridge - Denver Field Ornithologists
Colorado, USA

Daily Raptor Counts: Apr 30, 2022
SpeciesDay's CountMonth TotalSeason Total
Black Vulture000
Turkey Vulture12370396
Osprey04345
Bald Eagle02558
Northern Harrier02430
Sharp-shinned Hawk16473
Cooper's Hawk2171182
Northern Goshawk079
Red-shouldered Hawk000
Broad-winged Hawk14545
Red-tailed Hawk5322737
Rough-legged Hawk003
Swainson's Hawk03434
Ferruginous Hawk0963
Golden Eagle11038
American Kestrel0294326
Merlin01317
Peregrine Falcon11017
Prairie Falcon0310
Mississippi Kite000
Unknown Accipiter11313
Unknown Buteo0915
Unknown Falcon035
Unknown Eagle033
Unknown Raptor038
Total:2414752127


Observation start time: 09:00:00
Observation end time: 16:30:00
Total observation time: 7.5 hours
Official CounterEmma Riley
Observers: Courtney Rella, Keith Bellingham , Patty Bellingham



Visitors:
Courtney Rella, Patty Bellingham, and Keith Bellingham observed in the afternoon. The trail was relatively empty for a Saturday today, with 20 visitors at the Hawk Watch throughout the day.

Weather:
The skies stayed clear blue all day with light winds that varied in direction throughout the day. Temperatures reached 17 C. No snakes were seen!

Raptor Observations:
There were a few overhead raptors first thing in the morning, but activity slowed down greatly by 1000 MST. Birds were few and far between all day, with a small kettle of TV (8) over Mt Morrison to finish off the day. Local RT activity was notably low today, but we did have a local BE, a few TV, and a CH.

Non-raptor Observations:
FOY Yellow Warbler was seen today flying N along the ridge. Another Rock Wren was heard on the eastern slope of the hogback all morning. Many of the other usual visitors were seen today, with Woodhouse's Scrub-Jay's getting very active in the afternoon.

Predictions:
Partly cloudy to cloudy tomorrow with moderate speed winds from the NE predicted.


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] Washington Park

Chipping Sparrow,  Lark Sparrow and  American Goldfinches, Yellow-rumped Warbler.  1 Ring-necked Duck still hanging around. Is it unusual to see a Lark Sparrow in the city?

Jim Esten
Denver, COLark Sparrow_09495.jpgAmerican Goldfinch_09602.jpgSnowy Egret_09507.jpgChipping Sparrow_09498.jpg

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[cobirds] Bird Conservancy of the Rockies - Chatfield Banding Report, 4/30/22

Finished off April with a mostly Wren and Sparrow day.  Blue skies and no wind made it a great day to be out.  Here's the breakdown of today's 11 new birds:

House Wren 5
Yellow-rumped Warbler, intergrade 1
Spotted Towhee 1
Lincoln's Sparrow 1
White-crowned Sparrow, Gambel's 3

We are open 6 mornings per week, closed on Mondays.  Registration is required to visit on the weekends - there are three 1 hour sessions, starting at 7:30, 8:30 and 9:30.  Go here to register.  There are school groups every week day, arriving about 9:30.  Individuals may drop by early mornings during the week although there are groups visiting early on some days.

Meredith McBurney
Bander, Chatfield Station
Bird Conservancy of the Rockies


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[cobirds] 3 short bird song focused DFO field trips added May 19-21

Three new short (3 hour) early morning trips have been added to the DFO registration page for May 19-21, now open for sign-ups.

All will focus on learning bird song with a small group. Early starts get us out as things are beginning. These should be great learning and study opportunities, with good variety. We will be out walking the whole 3 hours each trip. Details and registration at the link below.
May 19 - Deer Creek Canyon Park
May 20 - Ken Caryl Ranch Hogbacks
May 21 - Chatfield along the S. Platte

David Suddjian
Ken Caryl Valley
Littleton, CO

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[cobirds] Zang's Spur, Colorado, bird list for April

To:  Colorado Birds:

Zang's Spur, is more commonly know as Broomfield CO;    :)    

Broomfield Bird list:  4/23/22 thru 4/30/22
Notes:  waterfowl migrant species rapidly decreasing;  hotspots are Plaster Reservoir and Alex&Michael's Pond.  All sightings are within Broomfield unless otherwise noted.  
Key:  
Pr = present in several or many locations
Pl = Plaster Reservoir
B = Brunner Reservoir
Br = Broomfield Commons
L = Broomfield Library Pond
LH - Legacy Highschool area
N = Nissen Reservoir #2
G = Glasser Reservoir
J = Josh's Pond
AM = Alex and Michael's Pond
RT - Ridge Trail
W = Westlake Park

Pied billed grebe - Pl
American white pelican - Pl, AM, B, W (up to 55 at AM)
Double crested cormorant - Pl, W
Black crowned night heron - AM (3)
Snowy egret - AM (5)
Great blue heron - Pl, B, N, J, AM, W
Canada goose - Pr
Cackling goose - L, W
Mallad - Pr
Gadwall - Pl
Green winged teal - N
American widgeon - Pl, B, W, AM, W
Northern shoveler - Pl, AM, L
Blue winged teal - AM
Cinammon teal - Pl, B, J
Canvasback - Pl
Ringnecked duck - Pl, B, N
Lesser scaup - Pl, B, N
Common goldeneye - G
Bufflehead - Pl
Common merganser - Pl
Hooded merganser - B
Ruddy duck - B
Turkey vulture - LH, RT
Bald eagle - LH, RT
Cooper's hawk - Pr, in many locations, plus nesting at AM
Red tailed hawk - Pr and nesting
Swainson's hawk - AM, G
American kestrel - Pr
American coot - Pl, B, N
Killdeer - Pr
American avocet - AM (11)
Ring billed gull - Pl (numbers decreasing)
Common pigeon - Pr
Eurasian collared dove - Pr
Mourning dove - Pr
Great horned owl - 136th and Cedar - nesting
Belted kingfisher - LH
Northern flicker - Pr
Downy woodpecker - Pr
Say's phoebe - Pr
Blue jay - Pr
Black billed magpie - AM, Pl
American crow - Pr
Tree swallow - J - large flock
Barn swallow - Pr
Bushtit - Pr
Black capped chickadee - Pr
White breasted nuthatch - Pr
House wren - N, RT - inspecting bird boxes
Marsh wren - Pl (3) - search reeds, not cattails
American robin - Pr
European starling - Pr
Broad tailed hummingbird - RT
Audubon's warbler - Pl, AM (all males)
Western kingbird - RT
Spotted towhee - AM
Vesper sparrow - BT
Song sparrow - Pr
White crowned sparrow - Walgreen's near Zuni and Midway
Chipping sparrow - RT, AM
Western meadowlark - BT, RT
Red winged blackbird - Pr
Common grackle - Pr
Brewer's blackbird - G, BC
House finch - Pr
American goldfinch - Pr
House sparrow - Pr

Animals by sign or direct observation:
Coyote
Red fox
Raccoon
Black tailed prairie dog
Fox squirrel
Eastern cottontail

Cheers,  John T (Tumasonis), Zang's Spur, Colorado

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Re: [cobirds] Wishful breeding by RCKI at Arapahoe Co

I heard one singing today in Monument Valley Park in downtown Colorado Springs as well.

Diana Beatty
El Paso County

On Sat, Apr 30, 2022, 3:08 PM David Suddjian <dsuddjian@gmail.com> wrote:
Ruby-crowned Kinglets don't nest in Arapahoe County, but it seems they want to, or at least a crazy few have sought to try. This tiny montane forest nesting species is usually above 8500 feet in various conifer forests, reaching their peak up high in the spruce fir forests. But for three years now Ruby-crowneds are making a songful presence at Littleton Cemetery, with intent to attract a mate. The cemetery does stand out among the local landscape in having  a large number of mature spruce trees, so one could see why it might attract interest. 

Ruby-crowned is generally a rather sparse spring migrant at Littleton, where I have found it hard to even find in the last 9 years, except for individuals at Littleton Cemetery in the last 3 years. In 2020 multiple singers took up residence for some weeks, with the first on 1 May 20. The number grew to 5 singers, with multiple birds through 19 May 20, and only one lingering with steadfast song from a territory to 18 Jun 20  Then on 1 May 21 one RCKI returned singing in the same trees as the last one of 2020. I was sure it was the same bird back to try again. He stayed until 31 May 21. This year he (I am presuming it is the same) returned to the same trees on 4/27 and is singing steadily through today. He pretty much sings all the time. 

One thing I love with the RCKIs (Ricky Ricardos) singing on territory is that they sometimes enter into what I call a "percolation mode", where they repeatedly sing the first phrase of their song, so it sounds like it is percolating or bubbling right along.

David Suddjian
Ken Caryl Valley
Littleton, CO

Sent from my iPhone

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[cobirds] Wishful breeding by RCKI at Arapahoe Co

Ruby-crowned Kinglets don't nest in Arapahoe County, but it seems they want to, or at least a crazy few have sought to try. This tiny montane forest nesting species is usually above 8500 feet in various conifer forests, reaching their peak up high in the spruce fir forests. But for three years now Ruby-crowneds are making a songful presence at Littleton Cemetery, with intent to attract a mate. The cemetery does stand out among the local landscape in having  a large number of mature spruce trees, so one could see why it might attract interest. 

Ruby-crowned is generally a rather sparse spring migrant at Littleton, where I have found it hard to even find in the last 9 years, except for individuals at Littleton Cemetery in the last 3 years. In 2020 multiple singers took up residence for some weeks, with the first on 1 May 20. The number grew to 5 singers, with multiple birds through 19 May 20, and only one lingering with steadfast song from a territory to 18 Jun 20  Then on 1 May 21 one RCKI returned singing in the same trees as the last one of 2020. I was sure it was the same bird back to try again. He stayed until 31 May 21. This year he (I am presuming it is the same) returned to the same trees on 4/27 and is singing steadily through today. He pretty much sings all the time. 

One thing I love with the RCKIs (Ricky Ricardos) singing on territory is that they sometimes enter into what I call a "percolation mode", where they repeatedly sing the first phrase of their song, so it sounds like it is percolating or bubbling right along.

David Suddjian
Ken Caryl Valley
Littleton, CO

Sent from my iPhone

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[cobirds] Lazuli Bunting - Dougla

We just saw our first of season Lazuli Bunting -- sparkling blue, white, and tan in the bright sunlight.

Hugh & Urling

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[cobirds] White-throated Sparrow at Barr Lake 04/30/22

Hi all,
I thought some of you might like to know there's a White-throated Sparrow hanging around with a group of White-Crowned Sparrows at Barr Lake.
I found them on one of the big white logs on the side of the trail, not far north from the visitor center bridge, around 1pm today.

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[cobirds] Bird Conservancy of the Rockies - Chico Basin Ranch banding 4/30/22

Today picked up a bit with light winds off and on during the morning. Blue-gray Gnatcatcher and the Mountain race of White-crowned Sparrow were the new species captured this season. No sign of the Black-throated Gray this morning at the station. 2010 was the last time Chico Basin banded a Black-throated Gray Warbler.

15 New birds banded:
Blue-gray Gnatcatcher -1
Audubon's (Yellow-rumped) Warbler -3
Integrade Yellow-rumped Warbler -2 (looked mostly like the Myrtle race but had yellow tinge spot on throat.
House Wren -1
Hermit Thrush -1
Gambel's White-crowned Sparrow -2
Mountain White-crowned Sparrow -1
Song Sparrow -1
American Robin -3

2 Recaptures
Hermit thrush from Monday - It has increased its weight by 12% 
Brown Thrasher - banded previous years

We'll be open 6 days a week through May 27th, closed on Sundays (with the exception of being open on May 15th and closed on May 16th). We'll be returning from the first net run at about 6:30am. Stop by and visit us while you are here.

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[cobirds] Migration weather: next two days (5/1 - 5/2)

COBirders,
An astute weather-watcher asked what it was going to look like for birds with the next system coming in. They were ahead of my thinking for sure (darn work getting in the way of fun). 

5/1 SE CO will see a connection from the Yucatan

That map is quite telling of all of the overnight hours tonight.  That pattern doesn't look much different if you spend some time flipping through the times available on the wind maps from sundown tonight to sun-up tomorrow.  So this is a long duration convergence pattern which is a GREAT thing for SE CO.  Anywhere from Pueblo to Lamar (better towards Lamar than Pueblo) could see some great movements into the area overnight.  I also don't expect anything to leave the area from previous days, so we could see a large diversity of birds (even higher than already going on).  For the rest of CO tomorrow (Sunday), there won't be much movement of passerines overnight.  Expect though that this will change throughout the day on Sunday.  The connection from the Yucatan actually opens up throughout the day tomorrow and the northern Front Range gets in on the action!

5/2 Northern Front Range gets connected to the Yucatan

I expect that the northern Front Range will be the target on Monday after SE CO's good chances.  The problem with Monday is the chance of rain throughout the area.  This will make the birding maybe a bit more hit or miss location-wise.  But that won't likely matter too much because the birds WILL be on the move.  It may just be hard to guess the exact location of the best birding Monday morning due to the possible rain.  But, get out there and find the best spots and let everyone else know.  We'll be watching.

Now, this actually brings up another point.  With the chance of rain, this will mean the cloud cover will be lower, so overnight migrant listening might be really good for CO standards.  Low cloud cover drives the birds to be lower towards the ground, making calls easier to hear, and with the winds coming from the Yucatan, we have a good chance of getting some good night flight calls as long as it isn't raining where you are.  

And finally, if you haven't believed me for all these years, or you need more supporting information, you can check out birdcast's new "Migration Dashboard" for every county and state in the US.  https://birdcast.info/migration-tools/migration-dashboard/. This brand new website shows you estimated numbers of birds from real-time radar data over your county or state of choice.  Enter your county or state into the text field and press "Search".  This will take you to a page where you can monitor the radar-estimated bird counts over your area.  There is a nice archive to dig through as well to see how migration has been playing out recently compared to historical numbers.  This page has been quite instructive over the past couple weeks since it went live.  If you want to see more about the dashboard you can check out the recorded webcast about the new dashboard here: https://academy.allaboutbirds.org/live-event/the-birdcast-dashboard-live-radar-tracking-of-bird-migration-in-your-county-and-state/

May the winds be ever in your (and the birds') favor.
Bryan

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[cobirds] Glossy Ibis, Chatfield SP (JeffCo)

Today at around 10:00 we spotted a group of four ibis west of the kingfisher parking lot on the south side of Chatfield. A group of more experienced birders helped confirm that one was a Glossy due to the lack of white face, dark eye (instead of red), and dark facial skin (instead of pink). Didn't get great photos but others may have. The group flushed when an eagle flew over, but returned to the same spot not long after.

Other notable sightings included a first of season Wilson's Warbler and a White-Throated Sparrow at the Audubon trails and ponds. Really enjoyable spring birding morning!

- Evan
Littleton

[cobirds] Fwd: PRO/AH/EDR> Avian influenza, human (14): Americas (USA) H5N1

I received this from a listserve for the Project for Monitoring Emerging Diseases (ProMED). It contains useful information related to the epidemic of avian flu in wild birds and poultry and the low risk of infection in humans in Colorado. I've observed several dead pelicans and gulls in Larimer County in recent days. 


 From: ProMED <promed@isid.org> 

Sent: Friday, April 29, 2022 3:56 PM
To: Komar, Nick (CDC/DDID/NCEZID/DVBD) <nck6@cdc.gov>
Subject: PRO/AH/EDR> Avian influenza, human (14): Americas (USA) H5N1

 

AVIAN INFLUENZA, HUMAN (14): AMERICAS (USA) H5N1
************************************************
A ProMED-mail post
http://www.promedmail.org
ProMED-mail is a program of the
International Society for Infectious Diseases
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Date: Thu 28 Apr 2022 21:46 EDT
Source: KKTV [edited]
https://www.kktv.com/2022/04/29/colorado-man-tests-positive-h5-bird-flu-1st-human-case-us-cdc-reports-public-health-risk-assessment-remains-low/


The 1st human case associated with the H5 bird flu in the United
States was detected in a Colorado man. The Centers for Disease Control
[and Prevention] (CDC) shared information on the case with the public
on Thursday [28 Apr 2022], adding the "public health risk assessment
remains low." The CDC adds people who have job-related or recreational
exposures to infected birds are at a higher risk of infection and
should take appropriate precautions.

The CDC has been monitoring people exposed to H5N1 virus-infected
birds since the outbreaks were first detected in wild birds and
poultry in late 2021. To date [28 Apr 2022], H5N1 viruses have been
found in US commercial and backyard birds in 29 states and in wild
birds in 34 states. CDC has tracked the health of more than 2500
people with exposures to H5N1 virus-infected birds, and this is the
only case that has been found to date. Other people involved in the
culling operation in Colorado have tested negative for H5 virus
infection, but they are being tested again out of an abundance of
caution. Several wild birds have tested positive for the virus in
Colorado.

"This is the 2nd human case associated with this specific group of H5
viruses that are currently predominant, and the 1st case in the United
States," part of a news release from the CDC reads. "The 1st case
internationally occurred in December 2021 in the United Kingdom in a
person who did not have any symptoms and who raised birds that became
infected with H5N1 virus. More than 880 human infections with earlier
H5N1 viruses have been reported since 2003 worldwide, however, the
predominant H5N1 viruses now circulating among birds globally are
different from earlier H5N1 viruses."

The 40-year-old man who tested positive was isolating as of Thursday
[28 Apr 2022], as he was only experiencing fatigue. The Colorado
Department of Public Health and Environment (CDPHE) is reporting the
positive result is due to direct exposure to infected poultry at a
commercial farm in Montrose County. The person, who is an inmate at a
state correctional facility in Delta County, was working with poultry
as part of a pre-release employment program where participants have
the opportunity to work for private employers and be paid a prevailing
wage. The affected flock has been euthanized and disposed of under the
guidance of the USDA and CDA. All members of the response team,
including other inmate workers, were provided personal protective
equipment while working on the farm.

"We want to reassure Coloradans that the risk to them is low," said
Dr. Rachel Herlihy, state epidemiologist, Colorado Department of
Public Health and Environment. "I am grateful for the seamless
collaboration between CDC, Department of Corrections, Department of
Agriculture, and CDPHE, as we continue to monitor this virus and
protect all Coloradans." CDPHE adds human infections of the H5 viruses
are rare.

[Byline: Tony Keith]

--
Communicated by:
Ryan McGinnis
ryan@digicana.com

[The above report mentions the 1st human case of avian influenza
A/H5N1 in the United States. The 1st human case with this specific
virus group was reported in December 2021 in the UK. The predominant
H5N1 viruses now circulating among birds globally are different from
earlier H5N1 viruses. The case had a history of direct exposure to
poultry.

Typically human cases of zoonotic/avian influenza viruses are preceded
by outbreaks in poultry; there have been numerous outbreaks of avian
influenza A/H5N1 in USA and Canada, with loss of over 31 million birds
in the US commercial poultry industry in 2022
(https://www.wattagnet.com/blogs/27-agrifood-angle/post/44969-breaking-down-us-avian-flu-cases-by-flock-type).

Mod.TG comments: "As one looks through the postings of the rampage of
avian influenza, it becomes abundantly clear this virus is sweeping
through the country like a grim reaper. The virus is merciless to both
domestic birds and some species of wild birds in the USA and Canada.

"Destroyed bird counts are increasingly going up. This means live bird
counts are going down, affecting eggs and meat birds and decreasing
wildlife. As dead bird counts mount, the cost is rising in the grocery
stores, and in the cost of replacement birds" (from Avian influenza
(106): Americas (Canada, USA) mixed flocks, HPAI H5N1
http://promedmail.org/post/20220429.8702913).

"Because of the possible threat bird flu viruses pose to human health,
[it is important to conduct] research to learn more about these
viruses, for example, where they spread, how they spread, and what
kinds of disease they cause. This includes antigenic characterization,
antiviral resistance, genetic characterization, serology and
assessment of bird flu viruses' ability to cause disease and spread in
animal models. This information, coupled with disease surveillance
information, can help scientists better understand the risk these
viruses pose to human health"
(https://www.cdc.gov/flu/avianflu/risk-assessment-research.html).

Using the WHO animal-human interface review dated 14 Apr 2022, we
understand that most human cases were sporadic infections exposed to
A(H5) viruses through contact with infected poultry or contaminated
environments, including live poultry markets
(https://www.who.int/publications/m/item/influenza-at-the-human-animal-interface-summary-and-assessment-7-april-2021).
Since the viruses continue to be detected in animals and related
environments, further human cases can be expected.

Even though small clusters of A(H5) virus infections have been
reported previously, including those involving healthcare workers,
current epidemiological and virological evidence suggests that
influenza A(H5) viruses have not acquired the ability of sustained
transmission among humans; thus, the likelihood is low.

Strong surveillance is needed at the health facility level for cases
presenting with the respiratory illness and history of handling
poultry. With the COVID-19 pandemic far from over, this remains a
challenge and requires continued advocacy. Human infections with
microorganisms of animal origin must be suspected among the population
when human-animal interfacing is common. Surveillance for influenza
viruses both in poultry/animal and human population, together with
early laboratory confirmation of such viruses to detect antigenic
drift or shift conferring human-to-human transmission of these
viruses, is critical for a timely response to avoid any large-scale
public health event. The Avian Influenza Weekly Update issued by WHO
for Western Pacific Region is available at
https://www.who.int/docs/default-source/wpro---documents/emergency/surveillance/avian-influenza/ai_20220422.pdf.
- Mod.UBA

ProMED map:
United States: https://promedmail.org/promed-post?place=8702920,106]

[See Also:
Avian influenza (106): Americas (Canada, USA) mixed flocks, HPAI H5N1
http://promedmail.org/post/20220429.8702913
Avian influenza (103): Americas (Canada, USA) mixed flocks, HPAI H5N1
http://promedmail.org/post/20220427.8702870
Avian influenza (102): Americas (USA) wild birds, HPAI H5N1
http://promedmail.org/post/20220425.8702840
Avian influenza (100): Americas (Canada, USA) poultry, mixed flocks,
HPAI H5N1 http://promedmail.org/post/20220422.8702765
Avian influenza (98): Americas (Canada, USA) poultry, mixed flocks,
HPAI H5N1 http://promedmail.org/post/20220420.8702706
Avian influenza (97): Americas (USA) wild birds, die-off, susp
http://promedmail.org/post/20220418.8702687
Avian influenza (96): Americas (Canada, USA) poultry, mixed flocks,
HPAI H5N1 http://promedmail.org/post/20220416.8702664
Avian influenza (92): Americas (Canada, USA) wild bird, HPAI H5N1
http://promedmail.org/post/20220413.8702586
Avian influenza (90): Americas (Canada, USA) poultry, mixed flocks,
HPAI H5N1 http://promedmail.org/post/20220413.8702577
Avian influenza (88): Americas (Canada, USA) poultry, mixed flocks,
HPAI H5N1 http://promedmail.org/post/20220411.8702536
Avian influenza (87): Americas (USA) poultry, mixed flocks, HPAI H5N1
http://promedmail.org/post/20220409.8702501
Avian influenza (86): Americas (Canada) poultry, mixed flocks, HPAI
H5N1 http://promedmail.org/post/20220409.8702499
Avian influenza (84): Americas (Canada, USA) poultry, mixed flocks,
HPAI H5N1 http://promedmail.org/post/20220405.8702425
Avian influenza (83): Americas (Canada, USA) mixed flocks, HPAI H5N1
http://promedmail.org/post/20220403.8702369
Avian influenza (80): Americas (Canada, USA) poultry, mixed flocks,
HPAI H5N1
Avian influenza (76): Americas (USA) poultry, HPAI H5N1
http://promedmail.org/post/20220326.8702236
Avian influenza (70): Americas (USA) wild bird, HPAI H5N1
http://promedmail.org/post/20220320.8702088
Avian influenza (68): Americas (USA) mixed flocks, HPAI
http://promedmail.org/post/20220316.8702021
Avian influenza (65): Americas (Canada, USA) wild bird, HPAI H5N1
http://promedmail.org/post/20220311.8701931
Avian influenza (62): Americas (USA) poultry
http://promedmail.org/post/20220308.8701868
Avian influenza (53): Americas (USA) wild bird, poultry, HPAI H5N1
http://promedmail.org/post/20220225.8701648
Avian influenza (50): Americas (Canada, USA) poultry, mixed flock,
wild bird, HPAI http://promedmail.org/post/20220221.8701557
Avian influenza (40): Americas (USA) wild bird, HPAI H5N1
http://promedmail.org/post/20220210.8701387
Avian influenza (30): Americas (USA) wild bird
http://promedmail.org/post/20220201.8701178
Avian influenza (22): Americas (USA) wild bird, HPAI H5N1 Archive
Number: http://promedmail.org/post/20220120.8700990
Avian influenza (19): Americas (USA) wild bird, HPAI H5, OIE
http://promedmail.org/post/20220117.8700932
2020
----
Avian influenza (39): USA (SC) poultry, HPAI H7N3
http://promedmail.org/post/20200410.7206731
2017
----
Avian influenza (79): USA (TN): poultry, HPAI H7N9
http://promedmail.org/post/20170317.4908223
Avian influenza (78): USA poultry, (AL) H7, (TN) H7N9, both LPAI
http://promedmail.org/post/20170317.4906690
Avian influenza (71): USA (WI) turkey, HPAI H7N9
http://promedmail.org/post/20170311.4893871
Avian influenza (69): USA (TN) poultry, HPAI H7N9
http://promedmail.org/post/20170309.4888517
Avian influenza (67): USA (TN) poultry, HPAI H7, OIE
http://promedmail.org/post/20170307.4883078
Avian influenza (66): USA (TN) poultry, HPAI, H7
http://promedmail.org/post/20170305.4881365
2016
----
Avian influenza (15): USA (IN) poultry, HPAI & LPAI H7N8
http://promedmail.org/post/20160121.3953508
Avian influenza (11): USA (IN) poultry, HPAI/LPAI H7N8
http://promedmail.org/post/20160120.3950429
Avian influenza (08): USA (IN) poultry, HPAI revised to LPAI H7N8,
update http://promedmail.org/post/20160118.3944747
2015
----
Avian influenza (164): USA (GA) HPAI H5N2, poultry, proactive
prevention http://promedmail.org/post/20150620.3452030
Avian influenza (151): USA (MN, IA) HPAI H5N2, poultry
http://promedmail.org/post/20150606.3414670
Avian influenza (120): USA, HPAI H5N2, poultry, turkey
http://promedmail.org/post/20150510.3352747
Avian influenza (80): USA, HPAI H5N2, turkey, poultry
http://promedmail.org/post/20150415.3298419
Avian influenza (74): USA (MN, ND) HPAI H5N2, turkey
http://promedmail.org/post/20150412.3292191
Avian influenza (59): USA (MN): turkey, H5N2
http://promedmail.org/post/20150329.326408]
.................................................uba/tg/rd

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Friday 29 April 2022

[cobirds] Townsend's Warbler at Ken Caryl, JeffCo

Maybe there is a Townsend's trend, as I enjoyed one, too, this evening. An adult male appeared with a neat little warbler flock in my backyard, with 11 Yellow-rumpeds (Myrtle, Audubon's and Myrtlebon's) and my first Orange-crowned Warbler of the season. 

By the way, here is a neat Ken Caryl Ranch field trip opportunity that just was added with DFO for May 17  :  https://dfobirds.org/FieldTrips/Register.aspx?TripID=13925
There are still a few spots open for this trip that will be a hike of up to 7 miles, with great bird song potential. Details at the link.

David Suddjian
Ken Caryl Valley
Littleton, CO

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[cobirds] Dinosaur Ridge - Denver Field Ornithologists (29 Apr 2022) 11 Raptors

Dinosaur Ridge - Denver Field Ornithologists
Colorado, USA

Daily Raptor Counts: Apr 29, 2022
SpeciesDay's CountMonth TotalSeason Total
Black Vulture000
Turkey Vulture4358384
Osprey04345
Bald Eagle02558
Northern Harrier02430
Sharp-shinned Hawk36372
Cooper's Hawk2169180
Northern Goshawk079
Red-shouldered Hawk000
Broad-winged Hawk14444
Red-tailed Hawk0317732
Rough-legged Hawk003
Swainson's Hawk03434
Ferruginous Hawk0963
Golden Eagle0937
American Kestrel1294326
Merlin01317
Peregrine Falcon0916
Prairie Falcon0310
Mississippi Kite000
Unknown Accipiter01212
Unknown Buteo0915
Unknown Falcon035
Unknown Eagle033
Unknown Raptor038
Total:1114512103


Observation start time: 09:00:00
Observation end time: 10:45:00
Total observation time: 1.75 hours
Official CounterEmma Riley
Observers: Dale Campau , Dave Hill



Visitors:
Dave Hill and Dale Campau volunteered to observe this morning and stuck out the winds for a bit of time. Bill Rivers, Kathryn Mutz, Mark Chavez, and Aaron Shipe were also visiting the ridge this morning and helped spot birds while getting great looks and photos of the BW. It was a fun morning while it lasted. We had a total of 6 visitors up at the Hawk Watch today.

Weather:
Winds from the NW and W started out calm today but picked up as predicted. Clouds were scattered across the sky all morning. Humidity was low and fire danger was high all along the front range. At 1015 MST winds started consistently blowing at 40-50 km/h and were getting worse over the next 30 minutes, causing us to end the count at 1045 MST.

Raptor Observations:
We had a nice little push of migrants before the torrential winds settled in for the day, including three SS back to back! The highlight of the morning was an adult BW that came overhead and could be seen naked eye. Local RT were seen all morning using the winds to their advantage to hunt.

Non-raptor Observations:
We had a great variety of birds up at the ridge this morning including Pine Siskin (3), Lazuli Bunting (1), Rock Wren (1), Blue-gray Gnatcatcher (2), Stellar's Jay (1), Blue Jay (1), Yellow-rumped Warbler (4), and more of the usual suspects.

Predictions:
Sunny and warm with winds predicted to be moderate from the NE. We are hoping for more of the SS push that we got a hint of today.


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] Bird Conservancy of the Rockies - Chatfield Banding Report, 4/29/22

We banded 9 birds of 8 species today, which felt like a million after a couple of 3-bird days!  We caught our first Orange-crowned Warbler, which means we have caught all of the 9 migrating species that we commonly capture in April.  Here's the breakdown of new birds today:

Downy Woodpecker 1 (FOS)
House Wren 1
Orange-crowned Warbler 1 (FOS)
Yellow-rumped Warbler, Myrtle 1
Yellow-rumped Warbler, Audubon 1
Green-tailed Towhee 1 (FOS)
Song Sparrow 1
White-crowned Sparrow, Gambel's 2

We are open 6 mornings per week, closed on Mondays.  Registration is required to visit on the weekends - there are three 1 hour sessions, starting at 7:30, 8:30 and 9:30.  Go here to register.  There are school groups every week day, arriving about 9:30.  Individuals may drop by early mornings during the week although there are groups visiting early on some days.

Meredith McBurney
Bander, Chatfield Station
Bird Conservancy of the Rockies

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[cobirds] Calmante Owls!

The pot is pretty crowded these days!

Lisa Carp
Superior

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[cobirds] Worm-Eating Warbler Lake Hasty Campground Bent County

We just had a Worm-Eating Warbler at Lake Hasty Campground. It was primarily feeding in a clump of dead leaves in a tree in campsite 75. We have not yet found the Cape May or Golden-winged x Blue-winged.

John Malenich and Jessica Miller
Boulder,  CO 

Re: [cobirds] Pelican Mortality at Union Res (Boulder Co.)

These are water fowl, which may be susceptible to the avian flu they're very worried about. I think CPW wants to know about this level of fatalities.

Lynne Forrester 
Littleton, Jefferson County 

RE: [cobirds] Glossy Ibis at Heron Pond.

To supplement Norm Erthal's email of yesterday below, I should apologize for my own waffling on the Heron Pond Ibis. I saw this bird on Monday 25 April and identified it (and posted it to ebird) as White-faced Ibis. For the reasons Norm cites, I saw no reason to doubt the id.

On Tuesday, I read an ebird post which, citing photos, had identified, presumably the same bird, as a Glossy. I then was prompted to review three poor photos I had snapped of the bird which, while ambiguous, to my surprise seemed to support Glossy. I then changed my post to Glossy.

When I got Norm's clarifying email, I took another look at my photos, and recalling the opacity of Heron Pond mud, realized that in between my visual ID and the photos the aforesaid Ibis had devilishly dunked his bill and head in silt becoming Plegadis obscura.

 

I have again amended my post. Hopefully, no one spent a $5 gallon to go see a Glossy after my first amended post. In summation, even with photo "evidence", sometimes "first thought, best thought" is more reliable. Or, it also calls to mind, "fool me once….., fool me twice…." Or however that goes. 😊

John Cobb

Denver

 

 

From: cobirds@googlegroups.com <cobirds@googlegroups.com> On Behalf Of Norm Erthal
Sent: Thursday, April 28, 2022 6:32 PM
To: Colorado Birds <cobirds@googlegroups.com>
Subject: [cobirds] Glossy Ibis at Heron Pond.

 

I may have caused some confusion by posting on eBird both Glossy and White-faced. I thought it would give me a good way to make comments about the one ibis there by adding comments using notes for the glossy. I was able to get great views zoomed to 60 power. The bird was clearly a white-faced as the facial skin was obviously red with a complete white border. The border was not bold indicating it was not in full breeding adult plumage. There seems to be some confusion that I had photos which is not the case. My plan was to later delete glossy from the checklist which I did.

 

Norm Erthal

Arvada

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[cobirds] Bird Conservancy of the Rockies - Chico Basin Ranch banding 4/29/22

Another slow bird banding day. We did catch a couple first of the year/season: Orange-crowned and a Black-throated Gray Warbler (always a treat!).

3 New Birds Banded:
Gray Flycatcher-1
Audubon's (Yellow-rumped) Warbler-1
Black-throated Gray Warbler-1 (Second-year male-meaning it hatched last summer)

Recapture from previous year
American Robin-1

We'll be open 6 days a week through May 27th, closed on Sundays (with the exception of being open on May 15th and closed on May 16th). We'll be returning from the first net run at about 6:30am. Stop by and visit us while you are here!

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Re: [cobirds] Violet-green Swallows & Human Structures

I'm just catching up with this message thread. Violet-green Swallows nest yearly in the eaves under my roof, near Larkspur (12 miles S of Castle Rock and then west 4 miles). 7000' ponderosa / gambel oak.

Dan Stringer
Larkspur, CO

On Friday, April 29, 2022 at 7:32:17 AM UTC-6 jared.d...@gmail.com wrote:
Thank you to everyone who's shared accounts, whether to the group or to me by email, of Violet-green Swallows nesting in human structures. I'll try to keep an eye on the pairs at DU and Streets of Southglenn in Centennial to see what they favor for nesting sites.

And I'd certainly welcome more reports or observations over the spring and summer -- 

- Jared Del Rosso
Centennial, CO

On Thursday, April 28, 2022 at 2:39:50 PM UTC-6 Nathan Pieplow wrote:
Every year, multiple pairs of Violet-green Swallows nest in buildings on the CU Boulder campus, usually in the space between the red tile roof and the gutter, as far as I've been able to ascertain.

The species also nested in cavities under the eaves of the log cabins of the summer camp where I used to work near Estes Park.

Nathan

On Thu, Apr 28, 2022 at 1:39 PM Charles Hundertmark <chunde...@gmail.com> wrote:
I don't recall seeing Violet-green Swallows nesting below the foothills, so nesting at DU might be interesting. However, during the Second Colorado Breeding Bird Atlas field work and before that in New Mexico I have seen these swallows nesting under eaves or in other crevices of rural buildings. The Second Colorado Breeding Bird Atlas species account confirms that this occurs. From the maps in the atlas it also appears that nesting may extend a short distance east from the foothills.

The breeding bird atlas remains an excellent source of information on questions about Colorado breeding birds.

Chuck Hundertmark
Lafayette, CO

On Apr 28, 2022, at 11:59 AM, Jared Del Rosso <jared.d...@gmail.com> wrote:

I'm writing to see if birders have observations of Violet-green Swallows nesting in buildings. I've seen them around buildings in the past -- and a few years ago, I watched one fetch bits of landscaping grasses from the tiny greenspace at Streets of Southglenn in Centennial -- but I haven't given much thought to this otherwise. On Tuesday, though, I watched a pair feeding amid Barn Swallows and visiting some small cavities in a stone building on DU's campus (Denver). 

I'm hoping to watch these birds a bit more, but I'm just curious about what others have observed. 

Unlike the building the swallows visited at DU, the buildings at Streets of Southglenn are fairly modern and typical in their design; I suspect at the latter space, they found holes in stucco or facades or small ledges, as opposed to actual cavities in stone.

- Jared

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[cobirds] Pelican Mortality at Union Res (Boulder Co.)

All:

I just saw another dead pelican at Union Reservoir in the last two weeks. When I reported the first one about 10 days ago, the ranger mentioned they had helped animal control capture a sick one that later died-so a total of three in last two weeks or so. I don' think I've seen three deceased pelicans in the last 20 years at Union, let alone in three weeks.

So, at what point do you all consider X number of dead birds within Y timeframe to be unusual, concerning or three alarm fire? I let the rangers know, is it time to place a call to CPW?

Would ask everyone who frequents Union to keep a watch and to report any mortality to the staff/rangers there. The two I have seen were on the north shore and a little south of the NW corner.

Jay Hutchins
Longmont


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[cobirds] FOS Bullock's Oriole, central Bldr Cnty

... in our orchard this morning, puzzling over caged suet feeder.

Linda Andes-Georges


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