[cobirds] Dinosaur Ridge - Denver Field Ornithologists (31 Aug 2022) 4 Raptors

Dinosaur Ridge - Denver Field Ornithologists
Colorado, USA

Daily Raptor Counts: Aug 31, 2022
Species	Day's Count	Month Total	Season Total
Black Vulture	0	0	0
Turkey Vulture	0	0	0
Osprey	0	0	0
Bald Eagle	0	0	0
Northern Harrier	0	0	0
Sharp-shinned Hawk	0	0	0
Cooper's Hawk	0	2	2
Northern Goshawk	0	0	0
Red-shouldered Hawk	0	0	0
Broad-winged Hawk	0	0	0
Red-tailed Hawk	0	8	8
Rough-legged Hawk	0	0	0
Swainson's Hawk	2	3	3
Ferruginous Hawk	0	0	0
Golden Eagle	0	0	0
American Kestrel	0	2	2
Merlin	0	0	0
Peregrine Falcon	0	0	0
Prairie Falcon	2	2	2
Mississippi Kite	0	0	0
Unknown Accipiter	0	0	0
Unknown Buteo	0	0	0
Unknown Falcon	0	0	0
Unknown Eagle	0	0	0
Unknown Raptor	0	0	0
Total:	4	17	17

Observation start time:	09:00:00
Observation end time:	12:30:00
Total observation time:	3.5 hours
Official Counter	Ajit Antony
Observers:

Weather:
The forecast called for winds from the WNW to NE. At the watch the winds were from the East changing to NE. Light winds increasing to moderate. Good cloud cover North and South of the watch 40>55>35%. Clear visibility to 16 km â€" hazy beyond that. Low humidity. Steady barometer.

Raptor Observations:
The 1st local TVs aloft were 9:09 AM EST. At 9:18 AM an immature CH flew just over and past the watch and turned around to chase a Raven and dive on another one perched on a pole, after which I watched it for 5 whole minutes to see pictures a migrant while it kept flying higher and eventually flew NW â€" not counted. At 9:34 AM 2 Swainson's Hawk were seen first to the SE constantly flapping with long and pointed wingtips flying SSW. At 9:48 AM I was binocular scanning over Green Mountain when I saw 2 Prairie Falcon (brown-backed, with dark coverts and axillaries through my 20-60x scope) flying south. TV 5, RT â€" 2 adult, 2 immature.

Non-raptor Observations:
Woodhouse's Scrub-Jay 2, Black-Capped Chickadee 2, Barn Swallow 4.

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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]

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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. Northern 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 a
Hawk Counter and volunteers from 9:30 AM to 5:30 PM from March 1st to May 14th,
weather permitting.

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] Re: Black-throated Sparrow now in Gilpin

Here is a nice pic by Gary Witt of our Black-throated Sparrow on today's DFO field trip to Gilpin County. 

I looked at fall (Aug-Nov) occurrences in Colorado in eBird and saw just 5 prior fall season records from the Front Range region (Boulder 3, Jefferson 1, Douglas 1) - all down out of the mountains. The bird today at Central City Reservoir is the only fall report in eBird from the mountains in all of northern Colorado.  

Ph. Gary Witt

This is the second time a DFO field trip has come up with a first county record in Gilpin County this year (the other was Black-and-white Warbler 6/3). Maybe we need more visits. :-)  

David Suddjian

Ken Caryl Valley

Littleton, CO

On Wed, Aug 31, 2022 at 9:28 AM David Suddjian <dsuddjian@gmail.com> wrote:

We are viewing a juv Black-throated Sparrow at Central Coty Reservoir. Along the county road feeding near a green gate where the main inlet stream crosses.

Not on the eBird filter so maybe a county first?

David Suddjian
Littleton

Sent from my iPhone

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[cobirds] Bird Conservancy of the Rockies - Barr Banding Report, 8/31/22

Another day with lots of Wilson's Warblers (mostly hatch year birds) and a smattering of other species.  Between new and recaps, our visitor group got a close up look at seven warbler species - Wilson's, Yellow, Orange-crowned, Townsend's, MacGillivray's, Common Yellowthroat, and Ovenbird.  Here's the breakdown of the 53 new birds today:

Western Wood-pewee 3

Dusky Flycatcher 1

Red-breasted Nuthatch 1

House Wren 2

Orange-crowned Warbler 1

Yellow Warbler 7

Townsend's Warbler 1

Common Yellowthroat 3

Wilson's Warbler 32

Yellow-breasted Chat 1

Clay-colored Sparrow 1

If you'd like to enjoy fall birds up close and personal, please come visit!  Click here to make a reservation - we are offering one-hour slots (up to 15 visitors at a time) from 7:30-8:30 most weekdays (closed Mondays), and 8-9, 9-10, and 10-11 on weekends.  We look forward to seeing many of you during the season!

Meredith McBurney
Bander, Barr Lake Station
Bird Conservancy of the Rockies

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[cobirds] Thursday, September 8th - Fort Collins Audubon Society hosts David Leatherman for “The Natural Highs of Lower Rist Canyon”

Fort Collins Audubon invites you to join a virtual (and in-person watch party) program featuring David Leatherman, retired Forest Entomologist, avid birder and photographer. David will be presenting "The Natural Highs of Lower Rist Canyon" on Thursday, September 8th, 2022; Announcements at 7:00pm and Program at 7:20pm.

Virtual attendees: Enter the following link on your web browser at or before 7 p.m. and follow the instructions to join the meeting virtually: https://uso2web.zoom.us/j/83108184042 

We will be enabling live closed-captioning for Zoom attendees to utilize as they wish.

In-person attendees: We will host a watch party at the Fort Collins Senior Center (1200 Raintree Dr). 

"The fancy word for it is an "ecotone".  That is, the zone where two different habitat types meet.  Rist Canyon is one such place, a melding of prairie with mountains.  The wondrous math of it is 1 + 1 = 3: prairie and mountain species plus those of the foothills not typical of the other two. This presentation celebrates the rich diversity of one small piece of Lower Rist Canyon with emphasis on taxa characteristic of wildfire and bark beetle aftermaths.

David Leatherman is a retired Forest Entomologist, avid birder and photographer.  

JOIN US -- The Public is Welcome! ."

Andrew Monson

PR Chair, FCAS

Fort Collins, CO

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[cobirds] Bird Conservancy of the Rockies- Chico Basin Ranch Banding Station

Day 2 was a slower day than our first day of banding yesterday. However, it produced some nice species : Vesper Sparrow and and adult Yellow-breasted Chat. A couple recaptures from yesterday and slower numbers suggest that there was not much migration over night here. Eleven bird species captured today.

31 New Birds

Yellow Warbler-1

Wilson's Warbler-11

MacGillivray's Warbler-2

Western Wood-Pewee -5

Western Flycatcher -2

Dusky Flycatcher -2

House Wren -1

Yellow-breasted Chat -1

Chipping Sparrow -3

Vesper Sparrow -1

Brown Thrasher -2

4 Recaptures

Brown Thrasher -1* bird is a return from previous years 

Western Flycatcher -2

Western Tanager -1

The Chico Basin Ranch Banding Station is operated Monday - Saturday through September 29th. Depending on the weather, banding will conclude around 11:30 AM. Come visit the Ranch to see what is migrating through the area and stop by the banding station.

Julie Shieldcastle, Bander

Chico Basin Ranch

Bird Conservancy of the Rockies

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[cobirds] Bird Conservancy of the Rockies IMBCR story map

Hey all,

Bird Conservancy of the Rockies science team has just released a new ArcGIS Story Map that explains and describes our Integrated Monitoring of Bird Conservation Regions (IMBCR) program.  

I figured this story map might be of interest to birders in the state and in the region.  Please take some time to check out the interactive story map here: https://birdconservancy.maps.arcgis.com/apps/Cascade/index.html?appid=bf23599f073b4d8b97f876283dbb3ffa

The IMBCR program is our largest annual field effort, and provides opportunities for new and old biologists and birders to participate in our work, often in very remote and exciting places.  Keep your eye on our Careers page (https://www.birdconservancy.org/about-us/employment/) for opportunities to participate in this project and others!

(Full Disclosure: I am on the Science team, but not involved in the IMBCR project.  I did, however, spend a season as an IMBCR technician back in 2012, and will always remember what an incredible season that was!)

Matt

Matthew M Webb

Avian Ecologist and Motus Wildlife Tracking System Coordinator

Bird Conservancy of the Rockies

Motus project #281

970.482.1707 x36 (office)

970.405.7155 (mobile - use this number!)

www.birdconservancy.org

Connect with us on Facebook and Twitter

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[cobirds] Black-throated Sparrow now in Gilpin

We are viewing a juv Black-throated Sparrow at Central Coty Reservoir. Along the county road feeding near a green gate where the main inlet stream crosses.

Not on the eBird filter so maybe a county first?

David Suddjian
Littleton

Sent from my iPhone

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[cobirds] New Yard Birds

Three weeks ago, my husband and I made the move from Colorado to Missouri. During the ten years we lived in Longmont, I had a life list of 91 birds for our home. I am missing my morning coffee on the back patio where we would listen and watch as birds visited our garden and made flyovers on their way to Union Reservoir and various ponds. Migration always brought some new visitors which were wonderful to experience.

Blue Jays, European Starlings, House Sparrows, and Eurasian-collared Doves are also regular visitors here. Red-bellied and Red-headed Woodpeckers have replaced visits from Downy Woodpeckers and Northern Flickers. Ruby-throated Hummingbirds and Northern Cardinals are abundant at my feeders. Sunrise and sunset flights by Chimney Swifts are a nice daily addition.

New migrants are arriving and I'm looking forward to exploring and branching out as we settle into our new home on Stockton Lake. Colorado calls to me and I know I will return a couple of times a year to visit and bird my favorite areas.

Cheers,

Kelly Ormesher

Greenfield, MO

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[cobirds] Bird Conservancy of the Rockies - Barr Banding Report, 8/30/22

Our move to Wilson's Warblers as the primary species continues, with 37 banded today.  We did catch a few Yellows, including one we banded in 2020. A nice variety of species otherwise, for a total of 58 new birds today:

Downy Woodpecker 1

Western Wood-pewee 4

Dusky Flycatcher 2

Orange-crowned Warbler 3

Yellow Warbler 6 new, 1 banded 2020

Ovenbird 2 FOS

Wilson's Warbler 37

Chipping Sparrow 1

Clay-colored Sparrow 1

If you'd like to enjoy fall birds up close and personal, please come visit!  Click here to make a reservation - we are offering one-hour slots (up to 15 visitors at a time) from 7:30-8:30 most weekdays (closed Mondays), and 8-9, 9-10, and 10-11 on weekends.  We look forward to seeing many of you during the season!

Meredith McBurney
Bander, Barr Lake Station
Bird Conservancy of the Rockies

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[cobirds] Bird Conservancy of the Rockies- Chico Basin Ranch Banding Station

The Chico Basin Ranch was operating in full tilt today. Lots of Wilson's Warblers around the site. Exceptional birds of the day captured were Curve-billed Thrasher and Ovenbird. Twenty-one species of birds captured in the five hours or operation. 

65 New Birds

American Redstart -2

Wilson's Warbler -28

Yellow Warbler -2

MacGillivray's Warbler -4

Ovenbird -1

Western Wood-pewee -6

Western Flycatcher -2

Dusky Flycatcher -1

Hammond's Flycatcher -1

Chipping Sparrow -1

Brewer's Sparrow -1

House Wren -1

Warbling Vireo -1

Yellow-breasted Chat -2

Western Tanager -1

Swainson's Thrush -1

Gray Catbird -1

Black-headed Grosbeak -2

Brown Thrasher -5

American Robin -1

Curve-billed Thrasher -1

No recaptures

The Chico Basin Ranch Banding Station is operated Monday - Saturday through September 29th. Depending on the weather, banding will conclude around 11:30 AM. Come visit the Ranch to see what is migrating through the area and stop by the banding station.

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[cobirds] Banding - Townsend's, Virginia's Warblers, CSR, El Paso Co, Tues.

Hey COBirders,

Ok, so I admit I have no idea how migration works. I've been reading Meredith's posts from Barr Lake, and watching Birdcast maps and Dashboard to get an idea about when migrants might show up down here at Clear Spring Ranch. Birdcast shows HIGH numbers of birds passing over COS, but it looks like mostly at high elevation right before sunrise, and … I haven't been getting more than a handful of migrants, especially warblers, with only a handful each day. Like Meredith, I've seen Wilson's Warblers numbers replacing Yellow Warblers. (I got my first Wilson's Warbler the day after she did), but only 2-3 each day, not the 30's and 40's she is seeing.

Today looked like it would be the same - clear, warm, almost no breeze, and again, hardly any birds moving pre-dawn.

It got better.

There were small arriving waves of mixed species at dawn, and again about 9:00, but the biggest diversity arrived about 10:15, when usually everything is stopping because of the heat. Some birds were still finding the nets at 11:15, but by then it was 85o, and I closed down for the day.

Highlights banding today: 76 birds banded, now 950 for the month.

Wilson's Warbler - 16 Mostly Hatch-year F, a few HYM, 2 ADM
Com Yellowthroat - 2, ADM, HYM
Yellow Warbler - 2, ADM, HYF
MacGillivray's Warbler - 1 HYF
Virginia's Warbler - 1 HYM
FOS Townsend's Warbler - 1 HYF (chased into a net by a male Wilson's!)
FOS Warbling Vireo (my latest first vireo by two weeks)
FOS Vesper Sparrow
Lark Sparrow - 1
Chipping Sparrow - 37 (450 for the season)
Brewer's Sparrow - 2
Western Tanager - 1 HYF
Lazuli Bunting - 4, (now 120 for the season! Still mostly males)

Happy Migration,
Steve Brown
Colo Spgs

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Re: [cobirds] Hummingbird ID help, please DISREGARD

Please disregard my query.

The date stamps on these photos indicate that they were taken in Northern California, not Colorado. This bird is likely an Anna's Hummingbird, not a regular Boulder species.  I seem to have accidentally deleted the photos of the suspected Calliope that I took in Boulder.

My sincere apologies for the confusion.

Richard Trinkner

Boulder

On Aug 29, 2022, at 6:23 PM, 'Richard Trinkner' via Colorado Birds <cobirds@googlegroups.com> wrote:

Are the attached photos of an immature female Calliope Hummingbird? They were taken August 1st at the Boulder Community Gardens in north-central Boulder. The bird was noticeably very much smaller than the many Broad-taileds. It seemed closer in size to a large bee than to an adult Broad-tailed.

My hesitancy: Sibley shows immature Calliopes as having a thin white strip above the gape, which this bird doesn't show. The overall size was very tiny and the tail is shorter than the folder wings. Could this just be a slow-growing, small Broad-tailed with a short tail?

Thanks,

Richard Trinkner

Boulder<2022-08-01_193408-CalliopeHummingbird_BoulderCommunityGardens_2.jpg><2022-08-01_193422-CalliopeHummingbird_BoulderCommunityGardens.jpg>

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[cobirds] Hummingbird ID help, please

Are the attached photos of an immature female Calliope Hummingbird? They were taken August 1st at the Boulder Community Gardens in north-central Boulder. The bird was noticeably very much smaller than the many Broad-taileds. It seemed closer in size to a large bee than to an adult Broad-tailed.

My hesitancy: Sibley shows immature Calliopes as having a thin white strip above the gape, which this bird doesn't show. The overall size was very tiny and the tail is shorter than the folder wings. Could this just be a slow-growing, small Broad-tailed with a short tail?

Thanks,

Richard Trinkner

Boulder

Re: [cobirds] Unknown bird in Indian Peaks, Boulder County

Hi again,

I've had many people suggest a Canada Jay or Clark Nutcracker, which are good suggestions based on their size/shape/habitat, but Corvid vocalizing tends to cover the entire spectrum, from low to high, while the call I recorded was a single frequency going from low to high. The most nuanced call I could find in Merlin from either bird was the Canada Jay's "whispering song." Note the tall bands indicating a broad spectrum of sound and compare that to the spectrogram I posted on eBird which is a single line. 

(Hopefully the attachment works this time.) 

Thanks everyone!

Van

Sent from my iPhone

On Aug 29, 2022, at 06:38, J V Rudd <van.rudd@gmail.com> wrote:



Thanks all. I've added "Bird sp." to my ebird checklist and attached the audio there.

https://ebird.org/checklist/S117654347

Again, sorry for the quality. I was dealing with wind and a nearby stream.

Van

On Sun, Aug 28, 2022 at 8:16 PM van....@gmail.com <van.rudd@gmail.com> wrote:

Hi all,

I was birding just outside Indian Peaks Wilderness Area, near Brainard Lake, and had 4 robin-sized birds with grayish breasts fly over and land in a nearby tree. I was able to get an audio of a call that they were making (attached, admittedly poor quality, sorry) and Merlin couldn't figure it out. I checked birds that fit the geography, size, and color, but found none with a call like this. I checked Townsend Solitaire, Pine Grosbeak (although the bills were more thrush than grosbeak), Olive-Sided Flycatcher (not gray, but...), and even Mountain Bluebird (maybe they were all juveniles?), but none of these have a call that is even close.

Any insights from the experts?

Thanks,

Van Rudd

Louisville, CO

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Re: [cobirds] Unknown bird in Indian Peaks, Boulder County

Thanks all. I've added "Bird sp." to my ebird checklist and attached the audio there.

https://ebird.org/checklist/S117654347

Again, sorry for the quality. I was dealing with wind and a nearby stream.

Van

On Sun, Aug 28, 2022 at 8:16 PM van....@gmail.com <van.rudd@gmail.com> wrote:

Hi all,

I was birding just outside Indian Peaks Wilderness Area, near Brainard Lake, and had 4 robin-sized birds with grayish breasts fly over and land in a nearby tree. I was able to get an audio of a call that they were making (attached, admittedly poor quality, sorry) and Merlin couldn't figure it out. I checked birds that fit the geography, size, and color, but found none with a call like this. I checked Townsend Solitaire, Pine Grosbeak (although the bills were more thrush than grosbeak), Olive-Sided Flycatcher (not gray, but...), and even Mountain Bluebird (maybe they were all juveniles?), but none of these have a call that is even close.

Any insights from the experts?

Thanks,

Van Rudd

Louisville, CO

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[cobirds] Bird Conservancy of the Rockies - Barr Banding Report, 8/28/22

It is like a switch was flipped - 5 days with Yellow Warblers dominating and today we did not band any, replaced by 26 Wilson's Warblers.  Fall is coming!  40 new birds total today:

Mourning Dove 1 (We have caught 8 MODOs this season, matching 2006 for the most caught in one season.  Judging from the numbers around at the outer nets, there will probably be more.)

Dusky Flycatcher 1

Hammond's Flycatcher 1 FOS

Red-breasted Nuthatch 2 FOS

Orange-crowned Warbler 3

MacGillivray's Warbler 2 FOS

Common Yellowthroat 1

Wilson's Warbler 26

Chipping Sparrow 2 FOS

Song Sparrow 1

If you'd like to enjoy fall birds up close and personal, please come visit!  Click here to make a reservation - we are offering one-hour slots (up to 15 visitors at a time) from 7:30-8:30 most weekdays (closed Mondays), and 8-9, 9-10, and 10-11 on weekends.  We look forward to seeing many of you during the season!

Meredith McBurney
Bander, Barr Lake Station
Bird Conservancy of the Rockies

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[cobirds] Unknown bird in Indian Peaks, Boulder County

Hi all,

I was birding just outside Indian Peaks Wilderness Area, near Brainard Lake, and had 4 robin-sized birds with grayish breasts fly over and land in a nearby tree. I was able to get an audio of a call that they were making (attached, admittedly poor quality, sorry) and Merlin couldn't figure it out. I checked birds that fit the geography, size, and color, but found none with a call like this. I checked Townsend Solitaire, Pine Grosbeak (although the bills were more thrush than grosbeak), Olive-Sided Flycatcher (not gray, but...), and even Mountain Bluebird (maybe they were all juveniles?), but none of these have a call that is even close.

Any insights from the experts?

Thanks,

Van Rudd

Louisville, CO

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[cobirds] Dinosaur Ridge - Denver Field Ornithologists (27 Aug 2022) 2 Raptors

Dinosaur Ridge - Denver Field Ornithologists
Colorado, USA

Daily Raptor Counts: Aug 27, 2022
Species	Day's Count	Month Total	Season Total
Black Vulture	0	0	0
Turkey Vulture	0	0	0
Osprey	0	0	0
Bald Eagle	0	0	0
Northern Harrier	0	0	0
Sharp-shinned Hawk	0	0	0
Cooper's Hawk	0	2	2
Northern Goshawk	0	0	0
Red-shouldered Hawk	0	0	0
Broad-winged Hawk	0	0	0
Red-tailed Hawk	2	8	8
Rough-legged Hawk	0	0	0
Swainson's Hawk	0	1	1
Ferruginous Hawk	0	0	0
Golden Eagle	0	0	0
American Kestrel	0	2	2
Merlin	0	0	0
Peregrine Falcon	0	0	0
Prairie Falcon	0	0	0
Mississippi Kite	0	0	0
Unknown Accipiter	0	0	0
Unknown Buteo	0	0	0
Unknown Falcon	0	0	0
Unknown Eagle	0	0	0
Unknown Raptor	0	0	0
Total:	2	13	13

Observation start time:	08:30:00
Observation end time:	12:00:00
Total observation time:	3.5 hours
Official Counter	Ajit Antony
Observers:	Carol Cwiklinski, Liza Antony, Steve Small

Visitors:
A young woman presumably seeing the "Hawk Watch" sign asked if we could see hawks here, and when I said yes, and she asked "Right now?" I said no, that they fly through intermittently. I was thinking that the sign may be somewhat misleading to non-birders, suggesting that one could see hawks here all the time. This reminds me in 1979 when we were just starting to bird around our home in Croton New York and had bought a Peterson Field guide we found the Brinton Brook Bird Sanctuary so we eagerly went there. At that time we knew nothing about bird migration and went there, and were quite disappointed that here was a bird sanctuary with hardly any birds we could see!

Weather:
The forecast today was for NW winds changing in the afternoon to NE winds. NW winds are what we hope for at Eastern hawk watches in the middle of September for huge numbers of Broad-winged Hawks, though this is early in the season for a good migration I was curious what we would see. Thermal clouds started forming by 9 AM EST. These are capped by puffy rotating clouds resulting from adiabatic cooling of thermals. In the 10 AM EST hour large clouds were just north and just south of the watch helping us find hawks against the white background, as finding hawks against a perfectly blue sky if they are very high is next to impossible.

Raptor Observations:
I was very fortunate to have Carol Cwiklinski and Steve Small help with the count with their immense experience at this site. They found practically all the hawks. Their example gives me something to aspire to. The 1st raptor we thought was an RT at 8:42 AM EST coming in from the north which then dropped in a stoop, so not counted. The only countable migrants were 2 RT hi and directly overhead that Steve found while looking at an airplane. At 11:04 AM Steve saw a Golden Eagle flying north. At 11:20 AM he saw a TV flapping a lot which is unusual for that species, then finding an adult GE probably the reason for the TV's panic. I was able to pick the GE in my scope. At 10:14 AM Carol found an adult Swainson's Hawk (cleanly cut well-defined two-tone wings with "black in back" and well-defined dark bib) which went past the site â€" we were happy to count it, and then turned around and flew North, hunting â€" not counted. At 10:33 AM a very high SWHA and an RT flying north. In the last hour 2 TV looked like they were migrating but didn't. Turkey Vulture 2, Red-tailed Hawk 2 (adult, immature).

Non-raptor Observations:
Woodhouse's Scrub-Jay 3, Common Raven 6 together, Barn Swallow 3, Blue-gray Gnatcatcher and Black-capped Chickadee heard,

---

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 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
Eagles, Bald Eagles, Northern harrier, Osprey, Peregrine Falcons, Prairie
Falcons, Cooper's and Sharp-shinned Hawks, American Kestrels, Merlin, and Turkey
Vultures. Northern Goshawk is rare 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 a
Hawk Counter and volunteers from 9:30 AM to 5:30 PM from March 1st to May 14th,
weather permitting.

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 - Barr Banding Report, 8/27/22

Our daily total continues in the mid-40s, Yellow Warblers again dominated, and we had a nice mix of first of season species today.  The star of the show was an Olive-sided Flycatcher, a rarity for the station (last one was caught in 2011).  Other FOS are identified below:

Olive-sided Flycatcher 1

Dusky Flycatcher 1

House Wren 4

Brown Thrasher 1 FOS

European Starling 1 FOS

Yellow Warbler 23

Townsend's Warbler 1 FOS

American Redstart 1 FOS

Wilson's Warbler 7

Song Sparrow 4

American Goldfinch 1 FOS

If you'd like to enjoy fall birds up close and personal, please come visit!  Click here to make a reservation - we are offering one-hour slots (up to 15 visitors at a time) from 7:30-8:30 most weekdays (closed Mondays), and 8-9, 9-10, and 10-11 on weekends.  We look forward to seeing many of you during the season!

Meredith McBurney
Bander, Barr Lake Station
Bird Conservancy of the Rockies

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[cobirds] A Changed (Again) Willow Spring Open Space - Arapahoe

Englewood Dam at Willow Spring Open Space was built, in 1936, to control storm water runoff in the southern suburbs of Denver. This dam is a large mound of earth; there is a foot path at its top and at its base. It's regularly maintained to prevent erosion -- mostly owing to trail users who bike, run, or sled up and down the dam (against the open space's regulations). 

Over the past few years, Beavers have further altered the open space. Building a dam within the dam, they've created a small pond. The pond, in turn, has attracted Snowy Egrets, Black-crowned Herons, Coots, dabbling ducks, and a stray Willet or two. Barn Swallows (and others) feed over it. Songbirds -- particularly Song Sparrows, Red-winged Blackbirds, and House Finches -- are usually numerous in the scruff (willows, hemlock, plum, and others) along the Beaver dam. 

But because Englewood Dam is built to control storm water runoff, the open space changed markedly during the early August rains. Water jumped the Willow Creek's meager banks, as well as the Beaver's dam. The rains submerged trails, plants, and habitats. I don't really know how high it got or how far it spread -- but wild roses and about-to-bloom Curlycup Gumweed were encased in mud, a foot or two up the plants, approx. 50-75 feet from the creek.

Visiting the dam after the rains was amazing. The space looked very much unlike Centennial. 

But it left me wondering what happened to the Beavers, the Red-wings, the Common Yellowthroats, and the Coyotes that live in the areas covered by water. Presumably, the Coyotes trotted somewhere drier for a time. Presumably, the Beavers moved elsewhere, though I'm unsure of where elsewhere is when the water levels change so rapidly and substantially. And I guess many of the birds, who (hopefully) had finished nesting and had fledglings who were fully able to fly, dispersed.

I've been to the open space since the waters have retreated. At dusk, a week or so ago, it was quieter. No sign of the Beavers, no Coyote howls, far fewer Blackbirds. This morning, much of the same. The pond seems shallower, perhaps owing to some damage to the Beaver dam. But perhaps that's just my pessimism.

Barn Swallows, however, were numerous. As were Western Kingbirds. There seemed to be at least two families feeding around the open space and, especially, what remains of the beaver pond. 

I didn't get a solid count of the Kingbirds, owing to how much they were moving around. There were at least 6, but perhaps as many as 10.

I had the good fortune to aim my binoculars at a Western Kingbird as it expelled a pellet. First time I've seen that.

An Eastern Kingbird and a Say's Phoebe were also hunting near the beaver dam. (I continue to wait for my first local Cassin's Kingbird. I expect that if I encounter one, it will be at Willow Spring Open Space.)

Farther up the creek, there were a few warblers in a narrow collection of trees off of Willow Creek. I got really, really poor looks -- but one struck me as not unlike a Nashville Warbler. (I didn't report it as such, given how poor my looks were.)

Other forms of life were just as remarkable. An impressive patch of purple asters was blooming at the Holly Street entrance. Bees were visiting. A single penstemon, along the base of the dam, had a few stray blooms. Heath aster is just beginning to bloom. Sand wasps were particularly active and numerous amid the defoliated rabbitbrush on the eastern edge of the open space. A few Palmer's Penstemons, in the same area, looked to have enjoyed the August rains. Perhaps they'll put on a display next year and reseed vigorously.

I don't know how the Beaver pond will continue to change and what that means for the birds who've come to rely on its wetness. I'm curious to watch and, given the extremes of Colorado's climate, just a bit anxious, too. (I'd already begun imagining visits from migrating Green Herons, Ibises, Avocets...) 

Finally, an odd consequence of the flooding. The water moved huge amounts of sand, covering portions of the Willow Creek Trail (until the city or county cleaned it). The sand was particularly deep in an area where Bobcats live. You can imagine what a giant pile of sand looks like to any cat -- a massive litter box. And so, during one of my walks soon after the flood, I encountered far more Bobcat scat along the trail than I'd seen previously. 

- Jared Del Rosso
Centennial, CO

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[cobirds] Custer County Red-headed Woodpecker

DFO's field trip to Custer County yesterday encountered two adult Red-headed Woodpeckers in the town of Wetmore. eBird shows just five other reports of RHWO (perhaps of just 4 birds) for Custer County, with the most recent ten years ago. Here is a picture of one of ours by Diane Roberts. 

Ph. Diane Roberts

We had a fun and diverse day, observing 95 species in the county despite some rain curtailing our actions. Other birds of interest were Clark's Nutcrackers flying west at the county line at Hwy 96 (along the edge of occurrences in Custer, and these seemed to be flying out of Pueblo County in an area with just open juniper woodland, so not typical settings), and two Eastern Phoebes at DeWeese Reservoir. Wetmore was hopping with different birds - four species of hummers at a feeder there in just a few minutes. That area and up Greenwood Road had a number of Lewis's Woodpeckers, Evening Grosbeaks, Blue Grosbeaks, Cassin's Kingbird, and Band-tailed Pigeons. A flock of 53 was exciting as they zoomed over, some featured in this nice flight shot by Gary Witt. Habitat for shorebirds is presently excellent at the head of DeWeese Reservoir, where Grape Creek flows in. There were quite a few shorebirds to look at. 

Ph. Garry Witt

Spaces are available on other adventurous DFO county excursions, now scheduled in varied directions.  https://dfobirds.org/FieldTrips.aspx

David Suddjian

Ken Caryl Valley

Littleton, CO

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[cobirds] Rio Blanco opportunity on Monday

DFO has a Monday 8/29 field trip reaching west to Rio Blanco County in the Flat Tops, birding also in Grand and Routt. This is a great one day opportunity to bird in Rio Blanco on a field trip. Right now we have 5 people in our group and for logistical reasons it would be great to add 2-3 more. We have drivers ready to drive. If you would like to try this opportunity with DFO, you can check out the details and register here:

https://dfobirds.org/FieldTrips/Register.aspx?TripID=14031

David Suddjian

Littleton, CO

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[cobirds] P.S. Just the SNEGs are displaying.

The BCNHs have left already!

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[cobirds] Snowy Egrets at Washington Park

I didn't count the BCNHs and SNEGs this year for Citizen Science re: the birds' breeding activities on the island in Grasmere Lake in the south part of Washington Park. But I thought I would go over last night and watch them come in to roost and count them, to see if they are about the same numbers as past years before they migrate. They were. Two of us counted 157 fly in and roost, from 6:40 - 7:50 p.m. It is fun to watch them come in - sometimes just two at a time, sometimes 8 and sometimes 33. Last night, one hundred and eight  flew in from the southeast (coming in from a day of R&R at Cherry Creek?) and fifty-one from the south or southwest (coming in from the Platte River?). Since it's an exciting sight inside Denver, I recommend this activity before they migrate in early September. The numbers go down as the calendar gets closer to Sept. 8, so catch them now if you're inclined. 

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[cobirds] Bird Conservancy of the Rockies - Barr Banding Report, 8/26/22

We continue on our good start for the season, with another 44 new birds, half of which were Yellow Warblers - it appears to have been a good breeding season here for this lovely species.   Early migrants just trickling in.  Here's today's new birds:

Mourning Dove 1

Western Wood-pewee 3

House Wren 7

Orange-crowned Warbler 1

Yellow Warbler 22

Northern Waterthrush 1

Common Yellowthroat 1

Wilson's Warbler 4

Clay-colored Sparrow 1

Song Sparrow 3

If you'd like to enjoy fall birds up close and personal, please come visit!  Click here to make a reservation - we are offering one-hour slots (up to 15 visitors at a time) from 7:30-8:30 most weekdays (closed Mondays), and 8-9, 9-10, and 10-11 on weekends.  We look forward to seeing many of you during the season!

Meredith McBurney
Bander, Barr Lake Station
Bird Conservancy of the Rockies

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[cobirds] Where do the birds go after breeding

Hi

In Colorado, birds breeding in our forests, start to move south when the breeding season concludes. It has always been assumed that the young fledging hangs around the nest site and then slowly shuffle their way south. But recently it's been discovered that the young actually leave the forest as fast as they can and head for the safety of the dense thickets that are along the edges of the forests, along roadsides, in clear cuts and any other places where the thickets occur. Thickets are where all the actions is; protection from raptors which can't squeeze their way through the tangled thicket branches, insects are plentiful and the berries are juicy. So what should we conclude from this information. Maybe instead of wasting time endlessly time peering through tall leafy trees, it maybe more productive in stead focusing on the thickets?

This information was adapted from Scott Weidensaul's 2021, A World on the Wing…

Bob Righter

Denver, CO

[cobirds] Bird Conservancy of the Rockies - Barr Banding Report, 8/25/22

Yellow Warblers and House Wrens continue to dominate our captures, as we banded another 48 birds this morning.   Here's today's list:

Mourning Dove 1 (This was our 6th of the season, close to a record number.  Two adults and four hatch year birds, two of which were so young they could have flown straight from the nest into our nets.  All caught in essentially the same area.)

Downy Woodpecker 2 (an adult female and a young male, caught together)

Western Wood-pewee 3

Cassin's Vireo 1

House Wren 12

Yellow Warbler 23

Common Yellowthroat 3

Wilson's Warbler 1

Yellow-breasted Chat 1

Clay-colored Sparrow 1

If you'd like to enjoy fall birds up close and personal, please come visit!  Click here to make a reservation - we are offering one-hour slots (up to 15 visitors at a time) from 7:30-8:30 most weekdays (closed Mondays), and 8-9, 9-10, and 10-11 on weekends.  We look forward to seeing many of you during the season!

Meredith McBurney
Bander, Barr Lake Station
Bird Conservancy of the Rockies

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[cobirds] Yard Birds, Douglas

We see lots of juveniles this month. One day, 14 junior Spotted Towhees. Several fledgling Gray-headed Juncos and Mountain and Western Bluebirds. 12 fledgling Robins gorging on a Chokecherry bush.

House Finches, Black-headed Grosbeaks, and Lesser Goldfinches feeding begging youngsters. Chickadees (Mtn. & Black-capped) grab seeds and maybe take them to their kids, maybe stash them.  Nuthatches (White-breasted and Pygmy) like the suet and occasionally the thistle feeder. A fair selection of Hummingbirds, mostly Broad-tailed. A Cooper's Hawk youngster kekking for food & attention. One Cooper's crashed into our dotted window, but flew off and apparently didn't injure itself.

Our dotted windows seem to work pretty well at helping the birds avoid our windows.

Swallows have dispersed. So far, no fall migrants of note.

Hugh

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[cobirds] Bird Conservancy of the Rockies - Barr Banding Report, 8/24/22

Another pleasant early day of banding; 46 new birds banded.  Continue to have the expected large numbers of summer resident Yellow Warblers and House Wrens, but also got our first Wilson's Warblers, 2 young females arriving right on schedule.  Here's the breakdown of today's new birds:

Mourning Dove 3

Western Wood-pewee 3

Traill's Flycatcher 1

Willow Flycatcher 1

Dusky Flycatcher 1

Black-capped Chickadee 2

Black-capped/Mountain hybrid 1

House Wren 11

Yellow Warbler 18

Common Yellowthroat 2

Wilson's Warbler 2

Yellow-breasted Chat 1

If you'd like to enjoy fall birds up close and personal, please come visit!  Click here to make a reservation - we are offering one-hour slots (up to 15 visitors at a time) from 7:30-8:30 most weekdays (closed Mondays), and 8-9, 9-10, and 10-11 on weekends.  There is space this week!  We look forward to seeing many of you during the season!

Meredith McBurney
Bander, Barr Lake Station

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[cobirds] Dinosaur Ridge - Denver Field Ornithologists (24 Aug 2022) 7 Raptors

Dinosaur Ridge - Denver Field Ornithologists
Colorado, USA

Daily Raptor Counts: Aug 24, 2022
Species	Day's Count	Month Total	Season Total
Black Vulture	0	0	0
Turkey Vulture	0	0	0
Osprey	0	0	0
Bald Eagle	0	0	0
Northern Harrier	0	0	0
Sharp-shinned Hawk	0	0	0
Cooper's Hawk	1	2	2
Northern Goshawk	0	0	0
Red-shouldered Hawk	0	0	0
Broad-winged Hawk	0	0	0
Red-tailed Hawk	5	6	6
Rough-legged Hawk	0	0	0
Swainson's Hawk	0	1	1
Ferruginous Hawk	0	0	0
Golden Eagle	0	0	0
American Kestrel	1	2	2
Merlin	0	0	0
Peregrine Falcon	0	0	0
Prairie Falcon	0	0	0
Mississippi Kite	0	0	0
Unknown Accipiter	0	0	0
Unknown Buteo	0	0	0
Unknown Falcon	0	0	0
Unknown Eagle	0	0	0
Unknown Raptor	0	0	0
Total:	7	11	11

Observation start time:	08:00:00
Observation end time:	12:30:00
Total observation time:	5 hours
Official Counter	Ajit Antony
Observers:

Visitors:
A few hikers coming north along the Hogback Trail missed the turn going down and seem puzzled when they hit a dead end at the Hawk Watch. I told them where the trail went and were reassured when I told them there were others who made the same mistake.

Weather:
The forecast for Morrison CO called for NW winds changing to the first hour but at the watch the winds came from the East. By 8:15 a.m. EST there were small puffy thermals forming far to the West which became tall cumulus clouds which seem to come in the direction of the watch as well as slightly Southward -- the winds seemingly from the NW. I wondered if the wind from the East that I was experiencing was a ridge lift effect.

Raptor Observations:
The first migrant was an adult male AK at 8:32 a.m. EST which flew just over the watch. The first 2 local TV were seen over Mount Morrison at 9:05 a.m. EDT and a minute later 2 low just north of the watch. RT 1. In the fourth hour an RT over the ridge to the NW was chased for about 5 minutes by a CH, neither migrating. I was observing mainly towards the NW and W as the cedars north of the watch prevented a direct view North, occasionally walking over to observe from east of the cedars to observe South Table Mountain and North Table Mountain and Green Mountain where I did not see any raptors; nor do I expect to see too many as there seems to be no mechanism for creating thermals on that side, while to the West there is a continuous ridge lift from Wyoming (upto which there is a continuous line of roughly north-south mountains beginning in Alaska) along the Colorado Rockies.

Non-raptor Observations:
Woodhouse's Scrub-Jay 5, Black-capped Chickadee 3, American Crow 1, House Finch 2, House Wren (heard). A paraglider with a red and white parachute to the north. As I was about to leave another one which was blue and yellow, which was the one I had seen two days ago which flew past the watch and soared over Mount Morrison.

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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]

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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
Eagles, Bald Eagles, Northern harrier, Osprey, Peregrine Falcons, Prairie
Falcons, Cooper's and Sharp-shinned Hawks, American Kestrels, Merlin, and Turkey
Vultures. Northern Goshawk is rare 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 a
Hawk Counter and volunteers from 9:30 AM to 5:30 PM from March 1st to May 14th,
weather permitting.

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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