Sunday, 30 August 2026

[cobirds] Mount Zion Hawk Watch at Windy Saddle Park (30 Aug 2026) 45 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 30, 2026
Species Day's Count Month Total Season Total
Black Vulture 0 0 0
Turkey Vulture 11 97 97
Osprey 0 1 1
Bald Eagle 0 1 1
Northern Harrier 0 1 1
Sharp-shinned Hawk 0 3 3
Cooper's Hawk 0 12 12
American Goshawk 0 0 0
Broad-winged Hawk 0 0 0
Red-tailed Hawk 28 143 143
Rough-legged Hawk 0 0 0
Swainson's Hawk 5 15 15
Ferruginous Hawk 0 0 0
Golden Eagle 1 1 1
American Kestrel 0 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: 45 298 298


Observation start time: 08:00:00
Observation end time: 13:00:00
Total observation time: 5 hours
Official Counter Ajit Antony
Observers: Zak Hepler



Visitors:
A few hikers were interested in what we were doing. One Trail Runner shouted Hi hawkman, I saw you yesterday, and he ran down the steps. Zak interacted with the hikers very well and answered their questions. A 5-year-old girl came up and said to her mother I wish we had a telescope to see things (she knew more than many adults, who think my scope is a camera), then said I wish we had binoculars. I could do no less than offer her my binoculars to look through.

Weather:
The first day we've had in August without any smoke haze over Denver, Denver International Airport to the east and Mount Blue Sky to the west both at 39 km/25 miles were easily visible. Extensive cloud cover though mostly altoccumulus and usual cumulus developing in the west and moving eastward by the afternoon. In the beginning of the 11:00 o'clock MST hour there were only a few drops of rain, and increasingly dark clouds to the West. At 1:55 p.m. DST I could see rain falling to the West and it kept getting closer, and when it began drizzling I decided to leave.There were 50 lightning strikes 20 mi WNW. It began raining on my way down. I was almost all the way down when the rain stopped and I briefly thought of going back up, but the dark clouds to the west and extensive rain falling from the clouds there changed my decision.

Raptor Observations:
Zak found the first migrant raptors which were 3 swainson's Hawk to the NE below us, directly over the windsock, just at the edge of North Table Mountain, somewhat difficult to see and follow. Right after that there were 2 more SW and 2 RT which migrated, while I was following the original 3 which were far ahead of the others - a big advantage having two of us observing. The resident RT on Lookout Mountain repeatedly dove on the SW. The adult GE had molting secondaries and primaries. Many of the migrant raptors were seeing initially fairly high above the horizon going directly to the SSE, while the rest to a scene around the antenna on the east of Lookout Mountain, either flying SSE or going across Lookout Mountain toward the SSW or SW. Non-migrant raptor sightings: CH 3 juvenile, two of them were seen over North Table Mountain and they dove on each other repeatedly, flew together making a squeaky whistling sound that never heard before, which I found on the Peterson website associated with Nathan Pieplow's Peterson's Field Guide to Bird Sounds of Western North America, which he designates 'juvenile squeal.' The other juvenile CH flew South along the Kestrel Channel, came back and dove straight at us landing in back of a bush only 12 ft from us and a little below us, and within 30 seconds flying off without anything in its talons. Evidently only 20-30% of their hunting forays are successful. RT 16. TV 7, 6 of which were roused by a migrating RT from one of the antenna they were perched on, by diving very close to them.

Non-raptor Observations:
CONI 1, WOSJ 1, MOCH 3, WTSW 2, NOFL 2, VGSW 13, WBNU 1, RBNU 1, WEBL 3, SPTO 1, WEKI 1, BTHU 3, AMCR 2, CORA 5, GTTO 1, SAPH 1. I have noticed that while most weather comes from west to east, storms that start in the west seem to go to the NW and the SW of the hawk watch, fortunately bypassing us.

Predictions:
A chance of showers and thunderstorms, mostly cloudy, with a high near 80. Light and variable wind becoming east 5 to 7 mph in the afternoon.


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




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[cobirds] Clark’s Nutcrackers Alamosa

Yesterday 8/29 I drove up the road to Zapata Falls in Alamosa County, looking for Pinyon Jays. Near the top, just under 9,000’ the first birds I saw were two Clark’s Nutcrackers, then three more, then two of them going at it with a Sharp-shinned Hawk…within a minute I was able to see ten in the air in a wide circle of view. At every pull-off I saw one or two more, and their raucous calls were prevalent. The Pinyon Pine cones weren’t open, mostly greenish and sap-covered, and the birds were landing tree-top, pecking them apart. The lower I drove back towards the valley floor the less I saw, but at my last stop at 8400’ I was surprised to count eleven. I hadn’t seen this concentration of Clark’s Nutcrackers before, perhaps food sources up higher are sparse. I didn’t feel like getting scolded by eBird, so I’ll just say here, my count, considering I saw some of the birds more than once, was 66. One of the Clark’s single-note calls is similar to Pinyon Jay, a fun challenge. I did see one small flock of about 6 PIJA. Dan Stringer Larkspur, CO -- -- You received this message because you are subscribed to the Google Groups "Colorado Birds" group. To post to this group, send email to cobirds@googlegroups.com For more options, visit this group at http://groups.google.com/group/cobirds * All posts should be signed with the poster's full name and city. Include bird species and location in the subject line when appropriate. * Join Colorado Field Ornithologists https://cobirds.org/membership/ --- You received this message because you are subscribed to the Google Groups "Colorado Birds" group. To unsubscribe from this group and stop receiving emails from it, send an email to cobirds+unsubscribe@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/cobirds/B75F837E-99AE-411C-863A-4E45BEFBD6F5%40icloud.com.

[cobirds] COBC and eBird

COBirders,
An added benefit from CFO's annual Colorado Birding Challenge is the data we generate by reporting our sightings using eBird. Documenting the status and distribution of birds throughout the state benefits researchers, conservation efforts and government. Last year's COBC generated over 400 eBird checklists...that would be enough to elevate us to #4 on the list below!

Screenshot 2026-08-30 at 9.41.14 AM.png
Note that Colorado is ranked #5 for the number of eBird checklists submitted this month in spite of being ranked 20th by population and 9th by number of bird species (per official state bird checklist totals according to an AI bot), so coming in 5th for eBird checklists is noteworthy. Shoutout to Ted Floyd!

You can contribute to this year's COBC!

1. Form a team with one or more friends and register in one of the five COBC categories by visiting the COBC Campaign Page and clicking "Register." New this year is the Big Sit category where you can choose an area like Barr Lake or even your backyard and keep eBird checklists throughout the day!

2. Support a team with a donation or pledge by visiting the COBC Campaign Page and clicking "Donate." You have the option of contributing to the COBC in general, or selecting a specific team or teams from the drop down menu! 

Donations to the COBC will be matched 100% thanks to the generosity of a CFO member who provided a challenge grant to CFO of up to $10,000! Help us maximize this gift by donating today!

Good birding,

Peter Burke
CFO Board of Directors

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[cobirds] BIRD BOMBS: Fall Out October 15 at 7pm

Take cover for DFO's BIRD BOMBS: Fall Out on October 15 at 7PM Mountain Time. Discuss identification of some Autumn bird challenges and things we look forward to as Fall unfolds. 

David Suddjian
Littleton, CO
BIRD BOMBS 2026 Oct 15 Fall Out.png

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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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