Friday, 16 October 2026

[cobirds] ABDU's at Monument Library Pond Flagged as "Exotic Escapee"

Greetings all,

I and others have recently reported American Black Ducks at the Monument Library Pond. I don't profess to know about categories that include "Exotic Escapee" and I'm curios why this occurrence seems to be the only one out of a good number of other previous reports in Colorado that are not flagged as Exotic Escapee. They have recently appeared in "Species Map," where they did not occur as recently as a week ago. I did not expect that that would be so based upon my reading on the various categories.

Is someone aware of who released them or what farm they escaped from? Once again, I don't claim to know, and I'm not a reviewer, I'm just curious.

Thanks to all of those who contribute to this forum as well as the Colorado birding community in general.

Tom Behnfield
Lakewood, CO
behnfield@gmail.com




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[cobirds] Re: Bird I.D.

Likely a White-breasted Nuthatch

Tom Behnfield
Lakewood, CO

On Friday, October 16, 2026 at 7:02:32 AM UTC-6 Kit Basom wrote:

A friend (not a birder) texted me from Flagstaff yesterday, excited that she had just identified a "wheat crusted nut patch!" I assume her phone's voice recognition system is to blame. 

—Kit


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[cobirds] Bird I.D.


A friend (not a birder) texted me from Flagstaff yesterday, excited that she had just identified a "wheat crusted nut patch!" I assume her phone's voice recognition system is to blame. 

—Kit


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Thursday, 15 October 2026

[cobirds] Mount Zion Hawk Watch at Windy Saddle Park (15 Oct 2026) 1 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: Oct 15, 2026
Species Day's Count Month Total Season Total
Black Vulture 0 0 0
Turkey Vulture 0 21 269
Osprey 0 0 26
Bald Eagle 0 2 7
Northern Harrier 0 7 25
Sharp-shinned Hawk 0 10 29
Cooper's Hawk 0 58 238
American Goshawk 0 0 0
Broad-winged Hawk 0 7 109
Red-tailed Hawk 1 104 579
Rough-legged Hawk 0 0 0
Swainson's Hawk 0 5 194
Ferruginous Hawk 0 0 1
Golden Eagle 0 6 20
American Kestrel 0 12 141
Merlin 0 1 5
Peregrine Falcon 0 0 1
Prairie Falcon 0 0 2
Mississippi Kite 0 0 0
Unknown Accipitrine 0 1 4
Unknown Buteo 0 1 8
Unknown Falcon 0 0 0
Unknown Eagle 0 0 0
Unknown Raptor 0 6 16
Total: 1 241 1674


Observation start time: 11:15:00
Observation end time: 14:00:00
Total observation time: 2.75 hours
Official Counter Ajit Antony
Observers:



Visitors:
A couple asked me if I were hawk watching, which is more than most visitors know. He said his sister is involved with a hawk watch, and she turned out to be Janet Peters the coordinator of the Dinosaur Ridge Spring Hawk Watch in Golden, Colorado. I said she is a dynamo, I know her well and I have worked with her at Dinosaur Ridge, and that she was excellent getting different organizations to donate money to the hawk watch. Another couple told me that I 'chose a good place to sightsee.' I explained what I was doing. Another hiker wanted to know what I was looking for and when I told him he wanted to know if it was a specific species of hawk. I explained that we can potentially see 17 species here, migrating.

Weather:
4 a strong cold front went through between Tuesday night and Wednesday morning but it drizzled all day yesterday and into late this morning. I checked the forecast for the percentage risk of rain and checked the CDOT highway webcams and came up to the watch by 12:15 p.m. MDT. There were strong Level 4-5 winds coming from the north which is an unusual direction for us here in fall without rain or snow accompanying, so I was curious whether hawks would use the 19 mph tailwinds aloft streaming straight down from Canada to fly today. We all know that the first or second day after a cold front goes through is the best for migrant hawks, but I didn't know whether they would fly here today or not. With the strong winds I was sure that only large strong hawks would migrate.

Raptor Observations:
The first local RT was seen at 12:39 MDT and there were 6 local RT soaring high using the ridge lift over Lookout Mountain. Only 1 RT migrated. I had good cloud cover all over to be able to check the entire sky and be sure that there were no other migrants. Non-hawk watches may wonder whether I had missed any hswks flying over the clouds, but generally hawks fly below the clouds because that's where the lift is. The heavily overcast sky and the wet ground after the rain prevented any good thermals from forming. The Soaring forecast predicted zero lift, and height of thermals of only 4,419 ft above ground level by 2:00 p.m. MDT. This probably explains the lack of migrants. A GE to the NE.

Non-raptor Observations:
Common Raven 14

Predictions:
Sunny, with a high near 57. Light and variable wind becoming east around 6 mph. The winds aloft at a height the hawks would migrate at is expected to be light from the SE.


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




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[cobirds] Re: Is this a Cassin's kingbird?

This bird was at mountaindale cabins & rv resort which is on the southern edge of El Paso county and partly in Fremont county.

Bill

On Wednesday, October 14, 2026 at 8:21:32 AM UTC-6 Bill Kosar wrote:
I saw this bird in the summer about 3 years ago and could not get a very good picture of it. It was high up in the Ponderosa's on  a campground west of 115 near Florence.

Thanks for any comments, I am not sure of what county I was in.

Bill Kosar    El Paso county
1Z7A5555_cr.jpg

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[cobirds] Yearbirder now in Microsoft Store

Hi folks,

Yearbirder, the free app I developed to help you analyze your eBird sightings and organize your bird photos and recordings, is now available in the Microsoft Store.

This has two benefits for Windows users. For your security, Microsoft reviews and signs every app in the Store, so Yearbirder now installs without the security warnings you may have seen before. The Store also updates the app automatically whenever I release a new version. If those warnings prevented you from trying Yearbirder before, this is an easier and safer way to install it. The Store listing is at: https://apps.microsoft.com/detail/9PKH7PL7F5G2

If you already run Yearbirder on Windows and want to switch to the Store version, please uninstall the old one first so you do not end up with two copies on your computer. The Store version opens your existing Yearbirder media catalog, photos and recordings, so you will not lose any data, but it starts with fresh settings — you will need to re-open your eBird data file and re-enter your eBird API key if you use one. If you would rather not use the Microsoft Store, you can keep downloading the app from https://www.yearbirder.org/download.

Mac users should also download from https://www.yearbirder.org/download. Those versions are signed with my Apple Developer ID and notarized by Apple for your security. The current version is 2.20.

I hope people find Yearbirder useful. My download stats show more than 100 downloads so far, and I suspect most of those came from COBirds readers.

If you use Yearbirder, please email me with what you like and any improvements you might suggest.

Good birding,

Richard Trinkner
Boulder

PS: Getting Yearbirder into the Microsoft Store has been a pretty long journey and learning curve for me.  If having the app in the Store is helpful, please let me know!

Wednesday, 14 October 2026

Re: [cobirds] Couch's Kingbird Feather Conditions - Arapahoe

Yes, same here. Thank you, Colin.

Will be interesting / revelatory to see if the bird persists here through the cold and rain weather -- and the forecast frost on Friday morning.

- Jared Del Rosso
Centennial, CO

On Tuesday, October 13, 2026 at 7:33:29 PM UTC-6 Nathan Pieplow wrote:
Thanks, Colin. This is precisely the analysis I hoped someone would provide!

Nathan Pieplow
Boulder

On Tue, Oct 13, 2026 at 4:29 PM 'Colin Woolley' via Colorado Birds <cob...@googlegroups.com> wrote:
This looks like what we'd call a second-year bird (hatched in 2025 and now in its 2nd calendar year). Young kingbirds will often undergo an eccentric pre-formative molt, meaning they replace outer primaries and inner secondaries in their first fall. This is fairly unusual (but the norm for kingbirds) as for most species, young birds won't replace any flight feathers in their first fall. However, the eccentric molt pattern will start somewhere in the middle of the primaries and proceed outward, while also starting in the middle of the secondaries and proceed inwards, such that juvenile flight feathers (inner primaries and outer secondaries) are still retained through the first cycle. In this bird we see that the molt started with p1 and is going outward, and has made it as far as p8, with p9-p10 still retained but likely to drop soon. The secondaries have also started to molt, beginning with s1. This is the standard pre-basic molt pattern seen in adult birds, and not the eccentric pre-formative we'd see in a young bird. The cool part here is, because the outer p9-10 are clearly juvenile based on shape, we can say that this bird is undergoing its 2nd pre-basic molt (i.e. starting its 2nd cycle). If the p9-10 had already dropped and started growing in anew, we wouldn't be able to tell a second-year from any bird that could be older. This also means that this kingbird didn't molt outer primaries during its pre-formative molt last fall, which according to the Pyle Guide is not as common but may be seen more often in COKI in particular compared to other kingbirds. That also explains why the p9-10 are so very worn out; they are juvenile feathers and perhaps 16+ months old at this point and have more wear and tear than any feather this bird will have the rest of its life. Here's a diagram based on this photo from eBird.
Screenshot 2026-10-13 143750.png
Having so many photos of this individual bird in the Macauley Library is great, and shows how valuable this resource is for studying molt. Keep taking pictures of messy, molty birds!

Colin Woolley
Wheat Ridge

On Tuesday, October 13, 2026 at 2:02:04 PM UTC-6 Buzz Schaumberg wrote:
Thank you.



On Tuesday, October 13, 2026, 12:57 PM, Paul Malinowski <pilla...@gmail.com> wrote:

Interesting link, Nathan. Thank you. Here's a photo I got Friday showing the distinct orange crown patch on her.

COKI-261009-2.jpg

Paul Malinowski
Littleton, CO 

On Mon, Oct 12, 2026 at 6:05 PM Nathan Pieplow <npie...@gmail.com> wrote:
Hi all,

I got a spread-wing photo of the Couch's Kingbird that shows not all the flight feathers are worn:


The outermost two primaries, P10 and P9, are very worn, but the next few are fresh. Comparing their shapes with those at https://www.birds.cornell.edu/crows/kingbirdsX.htm makes it clear that the Colorado Couch's must be a female. I suspect it is a juvenile female, based on molt pattern, primary shapes, and the bare patches in the underwing visible in Paul Malinowski's photo, but I am not great at ageing birds by molt, so I'd love to hear other opinions. Juveniles are not supposed to have the orange crown patch which many people (not me) reported seeing.

Nathan Pieplow
Boulder

On Sat, Oct 10, 2026 at 8:45 AM David Suddjian <dsud...@gmail.com> wrote:
Jared, This BIRD BOMBS episode I'm Molting! offers a good primer on feather molt in our birds. 

David

On Sat, Oct 10, 2026 at 7:30 AM Paul Malinowski <pilla...@gmail.com> wrote:
Jared, I noticed that too this afternoon. Look at the bare spots in this photo as well as the worn feathers.

COKI-261009-1.jpg

Paul Malinowski
Littleton, CO

On Fri, Oct 9, 2026 at 6:49 PM Jared Del Rosso <jared.d...@gmail.com> wrote:
I enjoy reading Birds of the World, but I don't understand plumages, molts, and the terminology used to describe them. So it's hard for me to understand what the Couch's Kingbird currently at Marjorie Perry Nature Preserve in Arapahoe County should look like. But the bird, who I visited for the first time this afternoon, looks to be really worn to me. Could someone out there who both has access to Birds of the World and understands the terms of molting, offer some perspective on this?

Here's a couple photos from this afternoon that show what I mean.

Screenshot 2026-10-09 at 6.46.43 PM.png

Screenshot 2026-10-09 at 6.47.28 PM.png

- Jared Del Rosso
Centennial, CO

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