[cobirds] Western Warbling Vireo Custer County

About a month ago I wrote bemoaning the fact that Merlin was not recognizing Western Warbling Vireos in the foothills of the Sangre de Cristos.

Well I finally figured it out.  Updated my Merlin and now it's finally recognizing that the forest is full of Western Warbling Vireos!

So anyone out there who has been experiencing Warbling Vireo issues (or any other Merlin issue) -- go to your app store and update!

Mary Kay Waddington

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[cobirds] Next BIRD BOMBS July 9 Summer Hummer Celebration!

Hi CoBirders,

Register now for DFO's BIRD BOMBS: Summer Hummer Celebration!, set to explode on Thurday July 9. This free webinar is just in time for the arrival of Rufous and Calliope Hummingbirds, as Colorado's Hummer Summr heats up. Identification of our hummers is a perennial challenge we look forward to each summer. BIRD BOMBS will offer a helpful look at identification of challenges with Rufous, Broad-tailed, Calliope and Blac-chinned hummers. 

Denver Field Ornitholgists also offers a series of field trips to observe four species of summer hummers. Check out the trips with the Summer Hummer icon on our DFO Field Trip Calendar.  And more hummer opportunties will be added. All DFO field trips have free registration and are open to all. 

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[cobirds] Habitat Blast: Alpine Living available to view

The video of DFO's June 25th BIRD BOMBS Habitat Blast: Alpine Living is available for viewing.  Learn about the bird communities of  Colorado's subalpine forest and alpine zones.  

David suddjian

Littleton, CO

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[cobirds] Boulder Bobolinks

The bobolinks have returned for another year to the open space south and east of the junction of South Boulder  and Cherryvale  Roads in Boulder County.  Several males were present this afternoon (June 28) at 5:05 p.m.  offering good views in flight and perched near the road.  As always, beware of the roadside vegetation - poison ivy is abundant in this area.  But friendlier flora can also be found as Utes Lady Tresses bloom here later in the summer.

Bob Fiehweg and Robin Byers

Boulder

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[cobirds] frozen thrush specimen; and Eastern Bluebird

Hi folks -- If anyone makes regular trips to the Denver Museum NS and would be willing to ferry a frozen little corpse to the staff there, I'd appreciate it. (The C.U. Museum is closed for the summer). I don't drive to Denver any more. I have a beautiful little Swainson's Thrush (frozen) to "donate." It's seems to be always the mountain birds that make the fatal mistake of seeing only the blue sky in a glass window, despite our strings of beads and bird profiles as warnings. On a happier note, after 22 years we finally have a bluebird in the yard; it's an Eastern, not a Mountain. It keeps checking out one of the old swallow nestboxes but this afternoon is singing up the hill as though no female has yet appeared. It seems very late. Possible early nest failure, or deceased mate?? Or 2nd brood? Linda -- -- 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/8F98ED69-AA79-4147-B91B-8C5D023821D0%40comcast.net.

Re: [cobirds] curious hummer behavior

In addition to David’s post, my understanding has been that the female hummingbirds feed their young predominantly insects to give them the protein they need to grow. Makes sense. 

      

Deb Carstensen, Arapahoe county 

Sent from my iPhone

On Jun 26, 2026, at 9:01 PM, David Suddjian <dsuddjian@gmail.com> wrote:



This is a common foraging behavior for Broad-tailed Hummingbirds (and perhaps others) -- feeding on insects over ponds and streams. I've observed females doing this most often. They are really good at it and in certain conditions they do a lot of it, so it seems to work well as a foraging strategy. It is, as you say, remarkable to watch.

David Suddjian

Littleton, CO

On Fri, Jun 26, 2026 at 8:44 PM 'Ron Bolton' via Colorado Birds <cobirds@googlegroups.com> wrote:

I was streamside at the St Vrain River, which was running quite strongly. I observed a hummingbird perhaps hawking for insects on the wing over the stream surface.

Intuitively this seems like an inefficient way to get calories. But it was remarkable to observe.

Comments?

Ron Bolton

Berthoud.

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Re: [cobirds] curious hummer behavior

This is a common foraging behavior for Broad-tailed Hummingbirds (and perhaps others) -- feeding on insects over ponds and streams. I've observed females doing this most often. They are really good at it and in certain conditions they do a lot of it, so it seems to work well as a foraging strategy. It is, as you say, remarkable to watch.

David Suddjian

Littleton, CO

On Fri, Jun 26, 2026 at 8:44 PM 'Ron Bolton' via Colorado Birds <cobirds@googlegroups.com> wrote:

I was streamside at the St Vrain River, which was running quite strongly. I observed a hummingbird perhaps hawking for insects on the wing over the stream surface.

Intuitively this seems like an inefficient way to get calories. But it was remarkable to observe.

Comments?

Ron Bolton

Berthoud.

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