Saturday, 29 August 2026

[cobirds] Mount Zion Hawk Watch at Windy Saddle Park (29 Aug 2026) 22 Raptors

Mount Zion Hawk Watch at Windy Saddle Park
Golden, Greater Denver, Colorado, USA

To see hourly weather data and details of migrant raptors, look up this watch at hawkcount.org. This is a new raptor migration site identified and designated in mid-September 2024. This is Colorado's 1st fall hawk watch site, and the second hawk watch in Colorado. To get to the site which is along Lookout Mountain Rd. in Golden, enter either Windy Saddle Park or Mount Zion into Google Maps on your favorite navigation app, or enter the coordinates 39.7368,-105.2454. From the parking lot ascend the stone steps to the watch site. EVERYONE IS WELCOME TO THE HAWK WATCH TO ENJOY THE SPECTACLE OF RAPTOR MIGRATION, EVEN IF YOU KNOW NOTHING ABOUT IDENTIFYING RAPTORS IN FLIGHT. We will help you to learn Raptor ID if you are interested. See https://groups.google.com/g/cobirds/c/Oznn4uc6MBk

Daily Raptor Counts: Aug 29, 2026
Species Day's Count Month Total Season Total
Black Vulture 0 0 0
Turkey Vulture 5 86 86
Osprey 0 1 1
Bald Eagle 0 1 1
Northern Harrier 0 1 1
Sharp-shinned Hawk 0 3 3
Cooper's Hawk 2 12 12
American Goshawk 0 0 0
Broad-winged Hawk 0 0 0
Red-tailed Hawk 12 115 115
Rough-legged Hawk 0 0 0
Swainson's Hawk 2 10 10
Ferruginous Hawk 0 0 0
Golden Eagle 0 0 0
American Kestrel 1 20 20
Merlin 0 0 0
Peregrine Falcon 0 1 1
Prairie Falcon 0 1 1
Mississippi Kite 0 0 0
Unknown Accipitrine 0 0 0
Unknown Buteo 0 1 1
Unknown Falcon 0 0 0
Unknown Eagle 0 0 0
Unknown Raptor 0 1 1
Total: 22 253 253


Observation start time: 08:15:00
Observation end time: 13:30:00
Total observation time: 5.25 hours
Official Counter Ajit Antony
Observers: Liza Antony



Visitors:
Many hikers were curious and we explained what we were doing. A couple with 3 children was especially interested and wanted to know more about how thermals form. The children wanted to know whether we could see bears, and I said we didn't. I asked them after explaining about raptor migration, which way did they think the raptors were migrating in this season, and one of them pointed West. I asked him what season would come after the next one? Their mother help them to winter. I asked what would they feed when there's are feet of snow on the ground. One of the children volunteered that they "build up enough stores to last all winter," and I said You're thinking of bears. That's why raptors migrate, I explained. They wanted to know if hawks migrate alone and I explained about the flocking behavior of BW and SW on migration. They wanted to know how far hawks migrate to, and I explained that BW and SW go as far as Argentina, and I showed them range maps on the Merlin app, which of course the children were very interested in. I showed them 2 TV high up, and 1 of them flew South and I explained that that could be a migrant. The father said he would get the Merlin app. We showed another couple a distant RT migrating. Another couple wanted to know whether the we were here daily, and whether we did this " before this time of your life," and I explained that I have been doing this for 40 years, and Liza for 11 years.

Weather:
Minimal smoke over Denver today. Mostly cloudy, but there were thin cirrus clouds allowing hot sunshine to shine through. Later, as usual for this site, cumulus clouds formed and increased from the West. The last 0.5 hours had a few drops of rain.

Raptor Observations:
Today was the first day that we had more migrants flying over the horizon with absolutely none of them flying SSE past the 2 antenna on the east end of Lookout Mountain. This is more like the flights we had when we counted in September in 2024. The first local raptors were two RT diving on each other, and they succulent flew very high already by 9:27 a.m. DST. The first migrant was an RT at 9:44 a.m. flying over Green Mountain, but very high c. 10� AGL, because of good lift of 18 ft per second and high thermals at 12,825 ft. AGL, a mile above the watch, according to the Soaring Forecast of the NWS. At 12:41 p.m. Liza found an easily visible RT over North Table Mountain, which flew through the Kestrel Channel but a little below eye level, then dropped against the conifers of the North face of Lookout Mountain where we were startled to see it had a white tail! Krider's? I was able to find it in my scope and it had the distal half of the tail dusky, a dirty looking belly and the usual white scapulars. Since it had brown on the dorsal wings we decided it wasn't a pure Harlan's Hawk but had Harlan's ancestry. It rose to the top of Lookout Mountain, circled, was attacked a few times by another RT, flew eastward for a while, and we couldn't believe it wasn't a migrant, and finally at 12:48 p.m. it finally did, followed by the other RT. Non-migrant raptors: CH 1, AK 1, TV 16, RT 17. While looking at the Kestrel Channel for any raptors, I suddenly had an insight as to why they fly along it. Windy Saddle is the saddle between Lookout Mountain and Mount Zion, and the prevalent late morning and afternoon East winds originating from Denver blow through the saddle, which kestrels and others use as a highway. Many of the raptors took around 5 minutes gaining height and circling around before they finally migrated, so it was good having Liza today.

Non-raptor Observations:
RECR 2, WTSW 3, TOSO 1, SPTO 1, WEBL 3, MOCH 1, BGGN 1, VGSW 13, AMRO 1, CORA 4, Bushtit 2.

Predictions:
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 86. South wind 5 to 9 mph, with gusts as high as 15 mph. The winds are aloft are predicted from the SW>WSW.


Report submitted by Ajit Antony (aiantony@earthlink.net)
More information at hawkcount.org: [Site Profile] [Day Summary] [Month Summary]




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[cobirds] Bird Conservancy of the Rockies - Barr Lake Banding Report, 8/29/26

First day of week 2, our slowest day of the season.  (However, we are slightly ahead of where we were on this same day in 2020, which was our biggest year ever.)  

Although Wilson's Warblers continue to drive the daily totals, the first big wave (147 to date, all but 2 hatch year birds) seems to have passed.  Our total new birds today was 23:

Hammond's Flycatcher 1
Northern House Wren 2
Yellow Warbler 4
Townsend's Warbler 1
Wilson's Warbler 13
Yellow-breasted Chat 1
Brewer's Sparrow 1

We are open Tuesday through Saturday, weather permitting, through October 23.  Most weekday mornings there is a visitor session from 7:30 to 8:30, and on the weekends there are sessions at 8, 9 and 10 a.m.  Reservations are needed; here is the link.   Please join us......It looks like it will be a great year to visit Barr!

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

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[cobirds] Colorado Birding Challenge is Taking Off!

COBirders,

As of today we have 18 teams registered for the COBC in 17 counties!

There is still time to sign up. Simply visit the Campaign Page, and click Register. Registration is discounted for Team Captains and free for team members. Or you can choose the Bird Your Own Way category, which is free for everyone.

Simply fill in your team name, indicate the category and county, upload some photos if you like and complete the registration and you are all set!

You can support one or more teams by visiting the Campaign Page, and clicking Donate. You will have the choice of making a general donation or contributing to a specific team(s).

ALL DONATIONS WILL BE MATCHED 100% UP TO $10,000 THANKS TO A VERY GENEROUS DONATION, SO PLEASE CONSIDER DONATING TODAY!

Good birding,

Peter Burke
CFO Board of Directors

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[cobirds] Chico Basin Ranch Banding Station Report- August 29, 2026

Another quiet day of birds on the Ranch. We had some quality, regardless of not much quantity. First of the season birds were Common Yellowthroat and Olive-sided Flycatcher. Anyone ever observing an Olive-sided Flycatcher up close would say Wow! what a beak on that bird! The better to catch insects with my dear! 
16 New Banded Birds
Wilson's Warbler- 1
Yellow Warbler- 1
Common Yellowthroat- 1
N. House Wren- 1
Western Wood-Pewee- 2
Least Flycatcher- 1
Olive-sided Flycatcher- 1
Western Tanager- 1
Gray Catbird- 2
Yellow-breasted Chat- 1
Red-breasted Nuthatch- 2
Brown Thrasher- 2

3 Recaptures
Gray Catbird- gained wt. from original banding date
Western Flycatcher- gained wt from original banding date
N. House Wren- stayed the same wt.

The banding station will be closed tomorrow and reopen on Monday at sunrise. You may visit the ranch tomorrow by registering online at Aiken Audubon website www.aikenaudubon.com
Hoping for a good migration wind to blow next week. Who knows? Only time will tell.
Have a great Weekend!

Julie Shieldcastle
Bander, Chico Basin Ranch
Bird Conservancy of the Rockies

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Friday, 28 August 2026

[cobirds] Mount Zion Hawk Watch at Windy Saddle Park (28 Aug 2026) 48 Raptors

Mount Zion Hawk Watch at Windy Saddle Park
Golden, Greater Denver, Colorado, USA

To see hourly weather data and details of migrant raptors, look up this watch at hawkcount.org. This is a new raptor migration site identified and designated in mid-September 2024. This is Colorado's 1st fall hawk watch site, and the second hawk watch in Colorado. To get to the site which is along Lookout Mountain Rd. in Golden, enter either Windy Saddle Park or Mount Zion into Google Maps on your favorite navigation app, or enter the coordinates 39.7368,-105.2454. From the parking lot ascend the stone steps to the watch site. EVERYONE IS WELCOME TO THE HAWK WATCH TO ENJOY THE SPECTACLE OF RAPTOR MIGRATION, EVEN IF YOU KNOW NOTHING ABOUT IDENTIFYING RAPTORS IN FLIGHT. We will help you to learn Raptor ID if you are interested. See https://groups.google.com/g/cobirds/c/Oznn4uc6MBk

Daily Raptor Counts: Aug 28, 2026
Species Day's Count Month Total Season Total
Black Vulture 0 0 0
Turkey Vulture 24 81 81
Osprey 0 1 1
Bald Eagle 0 1 1
Northern Harrier 0 1 1
Sharp-shinned Hawk 0 3 3
Cooper's Hawk 3 10 10
American Goshawk 0 0 0
Broad-winged Hawk 0 0 0
Red-tailed Hawk 18 103 103
Rough-legged Hawk 0 0 0
Swainson's Hawk 0 8 8
Ferruginous Hawk 0 0 0
Golden Eagle 0 0 0
American Kestrel 2 19 19
Merlin 0 0 0
Peregrine Falcon 0 1 1
Prairie Falcon 0 1 1
Mississippi Kite 0 0 0
Unknown Accipitrine 0 0 0
Unknown Buteo 0 1 1
Unknown Falcon 0 0 0
Unknown Eagle 0 0 0
Unknown Raptor 1 1 1
Total: 48 231 231


Observation start time: 08:15:00
Observation end time: 15:00:00
Total observation time: 6.75 hours
Official Counter Ajit Antony
Observers:



Visitors:
In the morning an older hiker ask me if I were bird watching and I explained what I was looking for. He wanted to know if I was a professor here. I said I am a retired urologist and I counted migrant hawks even while I was working, even in the pre-cell phone era carrying a pager! He said a bird would call outside his window and he did not know what it was for years, and finally he was able to figure out it was a black capped chickadee using the birdnet app. I told him about Merlin, and he put it on his phone. I explained what the scope does for me, and let him look at one of the antenna through it. A young woman said Pretty cool when I told her what I was doing. As I was shouldering my backpack to leave 3 young men came up and of course wanted to know what I was doing. They were from Ramsey New Jersey which is only 45 minutes from where I used to live in NY. Two of them were visiting the one who lives now in Denver. When I explained, they could not believe that raptors migrated as far as Argentina. I showed them the range map. And back in spring as well, I told them. They had innumerable questions such as can I make out all the 16 species we can see here? I said I wouldn't be here if I couldn't! They want to know the fastest raptors. PG and GE in a stoop. One of them noticed a raptor easily visible in flight. I was able to show them the white translucent windows of a juvenile RT. 15 minutes later I was finally able to leave. They wanted a photograph with me and asked 2 others who were up there to take a picture. One of them said to make us smile "Say red-tailed hawk," having listened to my conversation with the 3 men, he admitted.

Weather:
The by now usual wildfire smoke over Denver but not over the horizon. It was cool when the wind blew, and sweaty and hot when it did not. There was a large cloud to the east and south temporarily and intermittently blocking off the Sun.At different times during the day there was virga in many different. I heard thunder from the South and it was around 10 mi away past the watch. There was 5 minutes of light drizzle at the beginning of the 11:00 MST hour and a few drops 2 hours later. Rain that was initially predicted for noon did not show up at all in any significance.

Raptor Observations:
The first raptor found was a migrant below the crest of Green Mountain, while I was looking at 2 CORA, followed by 2 more along the same flight channel 1 and 4 minutes later. Green Mountain north end is 3.6 miles from this watch, and it is fortunate that it is treeless, with a smooth looking warm brown color of mainly grassland with scattered groups of shrubs, not that it's really easy finding raptors that distant against the face of the mountain, but is far preferable to trying to find them against the trees and houses between the watch and Denver. A majority of the migrants were found somewhere in relation to Lookout Mountain, especially the east end with the antennae. Some were found flying either over Green Mountain or west of Green Mountain which would be over the Dinosaur Ridge hawk watch which we cannot see from this location because of Lookout Mountain. A CH was fortuitously discovered west of the West-most antenna on Lookout Mountain while I was looking at 2 TV. Non-migrant raptors: RT mainly in groups of 2, 3, 4 a total of 12, with pairs of them chasing each other; TV 16 including 14 at one time with two RT over Lookout Mountain, none of whom turn out to be migrants after watching them for 10 minutes though some of them seem to fly in the right direction before turning around. The last 0.5 hours was the only time period without any migrants, until the last 4 minutes when 2 TV went through. The flight paths I could see today were just east of Lookout Mountain, around the easternmost 2 antenna on Lookout Mountain going directly SSE, from the same location going towards the SSW/SW flying over most of Lookout Mountain, and either over Green Mountain or just west of Green Mountain i.e. over the location of the Dinosaur Ridge Hawk Watch.

Non-raptor Observations:
BGGN 1, ROWR 1, BTHU 1, WEBL 1, GTTO 1, RBNU 1, WTSW 3, MOCH 1, SPTO 1, WBNU 1 interior West subspecies. Two young women hikers found elk in a clearing on Lookout Mountain and showed us. There were 5. Of course, they wanted to know whether I was a researcher, and I explained.

Predictions:
A 20 percent chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 66. West wind 5 to 8 mph. The winds aloft are predicted to be light from the WNW>NW>S.


Report submitted by Ajit Antony (aiantony@earthlink.net)
More information at hawkcount.org: [Site Profile] [Day Summary] [Month Summary]




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[cobirds] Bird Conservancy of the Rockies - Barr Lake Banding Report, 8/28/26

Today was the slowest day of our first week. Our daily totals have pretty much been driven by Wilson's Warblers and, to a lesser extent, Yellows and House Wrens, all of which were down today.  It seemed like the hottest and most humid morning we've had.  Tomorrow is forecast to be cooler; hope that happens!

Here's today's 33 new and 1 return:

Hammond's Flycatcher 1
Dusky Flycatcher 1
Western Flycatcher 1
Black-capped Chickadee 1
Red-breasted Nuthatch 1
Northern House Wren 2
Golden-crowned Kinglet 1
Yellow Warbler 5 new, 1 return banded in 2023
Townsend's Warbler 1
Wilson's Warbler 17
Yellow-breasted Chat 1
Song Sparrow 1

We are open Tuesday through Saturday, weather permitting, through October 23.  Most weekday mornings there is a visitor session from 7:30 to 8:30, and on the weekends there are sessions at 8, 9 and 10 a.m.  Reservations are needed; here is the link.   Please join us......It looks like it will be a great year to visit Barr!

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

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[cobirds] Chico Basin Ranch Banding Station Report- August 28, 2026

A quiet day at the banding station. The new species for the season was an adult Lazuli Bunting. She had a dried up brood patch so I was glad to see she was successful in nesting. There was a Western Tanager singing early and a Red-headed Woodpecker called near the banding station as well.
23 New Banded Birds
Wilson's Warbler- 7
Orange-crowned Warbler- 2
N. Yellow Warbler- 1
MacGillivray's Warbler- 2
Western Flycatcher- 1
Western Wood-Pewee- 1
Willow Flycatcher- 1
N. House Wren- 1
Lesser Goldfinch- 1
Chipping Sparrow- 1
Lazuli Bunting- 1
Swainson's Thrush- 1
Gray Catbird- 2
Brown Thrasher- 1

6 Recaptures- All gained weight from their original banding date
Wilson's Warbler- 2
N. House Wren
Gray Catbird- gained almost 3 grams since yesterday!
Brown Thrasher
Red-breasted Nuthatch

The Banding station will be open tomorrow at sunrise until @11:30 AM. If interested in visiting the banding station, please register on the Aiken Audubon website www.aikenaudubon.com.

Enjoy the Day!

Julie Shieldcastle
Chico Basin Ranch, Bander
Bird Conservancy of the Rockies

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