[cobirds] Bird Conservancy of the Rockies - Barr Banding Station Report, 8/31/24

Despite the heat, we continue to post decent numbers, with Wilson's Warblers leading the way.  I will report on how our second week this year compares with the 5-year average second week tomorrow.  But I can already say that we have surpassed the 5-year average for Wilson's (although we are way behind for Yellow Warblers and House Wrens, two other very common species this time of year).  As I've mentioned before, the Wrens and Yellows that we catch at this time of year are mostly summer residents, while the Wilson's are migrating through.

We banded 32 birds today, plus we caught 13 birds that had been previously banded this season.  Here are the new ones:

Mourning Dove 1

 Traill's Flycatcher 1 (I have been asked about why we often use "Traills" as opposed to "Willow" Flycatcher.  The updated (2022) Pyle Guide, which is basically the bander's bible, provides a fairly complex measuring system for separating the two species Willow and Alder.  When we have time, we will apply the formula and do the separation, but often we don't.  We believe that most if not all of what we call Traill's are Willows, which is the  species most likely to be found here.)

House Wren 1

Yellow Warbler 2

Townsend's Warbler 3

Common Yellowthroat 1

Wilson's Warbler 21

Brewer's Sparrow 1

Song Sparrow 1

We are banding Tuesday through Sunday mornings (closed Mondays).  There is a public session most weekday mornings from 7:30-8:30, and three time slots on weekends, at 8, 9, and 10 a.m. There is a $7 fee and registration is required – click here to register!

Let me know if you have any questions,

Meredith McBurney
Bander - Barr Lake Banding Station
Bird Conservancy of the Rockies

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[cobirds] HOW TO PARTICIPATE IN THE 2024 COBC

COBirders,

The Colorado Birding Challenge will take place on Saturday, Sept. 14th. This is the fourth year of the COBC, and the first time CFO has held it in fall! We hope you will all participate this year by taking part in one of the challenge categories and/or by supporting one or more of the teams. You can learn more on CFO's website: cobirds.org/cobc.

How do I set up a team?

To start a team, simply go to the COBC page on CFO's website (cobirds.org/cobc/) and click REGISTER. You will be prompted to select one of the four categories and which county you want to bird in. There is a registration fee for The Challenge and The Green Challenge, whereas The Under-25 Challenge and Bird As You Like categories are free.

Once you have registered, you will receive a confirmation email with a link to set up your team's COBC page. Here you can list details like your team's name, your team members, the county you'll bird in, your species goal and your fundraising target. Your team page has a donation link so that your supporters can contribute to your fundraising goal, so everyone on your team can share the link to your COBC team page with friends and family and on social media.

Does each person have to register, or just the team leader? 

Only the team leader needs to register, and there is only one registration fee per team!

How do I list the members of my team?

Individual team members can be listed on the team's COBC page.

How do I know which county to participate in?

You can bird in whichever county you like. You can review the par values, the number of species that can be expected for each county in mid-September according to eBird, on the COBC website, which may affect your decision. Otherwise there are no restrictions!

How can I join an existing team?

Unfortunately we are not able to match people with open teams at this stage. The best solution is to start your own team and find one or more people to join you! Another option would be to post to COBirds or the CFO Facebook Group that you are interested in joining a team in one or more counties near you!

Best,

Peter Burke

COBC Committee Chair

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Re: [cobirds] Long-tailed Jaeger and Sabine's Gull (both adults) at Chatfield

Nice description of the bird Joey and so useful, the exact location.

Cheers

Charlie

Denver

On Fri, Aug 30, 2024 at 8:04 AM 'Joey Kellner' via Colorado Birds <cobirds@googlegroups.com> wrote:

Adult Long-tailed Jaeger at Chatfield.  White chest, black cap, dark wings with pencil thin, white primary shafts; pointed wings, thinner wings than nearby Ring-billed Gulls that it was chasing.

Seen from the marina sandspit, but it was near the outlet tower.  Look for the small flock of Ring-billed Gulls that are following a group of cormorants.

An adult Sabine's Gull is also being seen near this flock.

Joey Kellner
Littleton, Colorado

Joey.

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Littleton, Colorado
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[cobirds] Bird Conservancy of the Rockies - Barr Banding Station Report, 8/30/24

A somewhat slower (and warmer) day; Wilson's continued to dominate, but we also had an interesting mix of other species, 27 birds total:

Mourning Dove 1

Warbling Vireo 1

House Wren 2

Swainson's Thrush 1 (FOS)

American Robin 3 (these were all young, with spotted breasts, caught in the same run in nets near each other; probably siblings)

Sage Thrasher 1 (another very young bird)

Yellow Warbler 1

MacGillivray's Warbler 1

Common Yellowthroat 1

Wilson's Warbler 13

Brewer's Sparrow 1 (FOS)

Chipping Sparrow 1 

We are banding Tuesday through Sunday mornings (closed Mondays).  There is a public session most weekday mornings from 7:30-8:30, and three time slots on weekends, at 8, 9, and 10 a.m. There is a $7 fee and registration is required – click here to register!

Let me know if you have any questions,

Meredith McBurney
Bander - Barr Lake Banding Station
Bird Conservancy of the Rockies

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[cobirds] CSR Addendum, 8/30/24

Hi again,

Telling my wife what I was doing she reminded me of a great Wilson's day at Chico Basin Ranch, that I had missed.

September 16, 2009, Brian Gibbons was the RMBO bander, I was extracting, and banding in tandem with Brian, and Jill was the double- recorder. 143 WIWA (!), and only 16 other birds all day, including Orange-crowned Warbler, in second place, with 4.

Gee, those days are fun!

Steve Brown
Colo Spgs

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[cobirds] Banding at CSR, El Paso Co, Fri

Hey COBirders,
I saw the posts by Meredith and SeEtta, and thought I'd comment, too.

1. I have seen some big Wilson's days at Clear Spring Ranch, usually in September, sometimes in the 20's and 30's. One such day was the day after the nasty September blizzard a couple years ago.
2. The best ever was at Barr Lake 9/14/07, when Starr Nicely was banding (I was just recording data that season). We had so many Wilson's at opening that only 10 nets even got opened. 103 WIWA in 4 hours, at one point 27 in one net! 2 banders, 2 extractors, one recorder, and two "bag runners" carrying out emptied bags and bringing back full ones. It was intense and fun.

3. I start banding at CSR on 8/1 each "fall" to work on the Yellow Warblers that are already moving. My experience in helping at Chico Basin Ranch was that most YEWA had already moved past by the time we opened around Labor Day. I have been banding A LOT of them in August at CSR since 2014. Most years about 100+. This year is the best ever. So far I've banded over 175, although numbers have diminished this week.

4. The other early migrant I see a lot of is Chipping Sparrow. Numbers are all over the place, with some falls seeing "few", maybe 150-200, one year 2500. This August started slowly for CHSP, but it has been bonkers this week. They usually arrive in flocks, hitting the nets like machine gun bullets, and sometimes filling the nets. Consequently, when that happens, there is no way to safely and in a timely manner band them all. For the record, then I band a sample of 10-12, and quickly release (and count) the rest.
This week I've netted 85, 95, 105, 145, and Wednesday 202. Almost all have been hatch-year birds this week, while earlier it was an even mix of hatch-year and adults (mostly adult females with residual brood patches visible).

5. Another note - this has also been a banner year for Lazuli Buntings. This is their month, too, but again, numbers the last decade have been all over the place. Some years a handful show up, other years 50-60. This month I've banded 150, already the most ever for me. Two weeks ago it was predominantly adult males being caught, this week almost all kids.

6. CSR is a good place to band Northern Waterthrush, too. Most falls I catch 15-20. The first three weeks this month I noticed I hadn't seen any yet, which was interesting, but that changed this week also, with 15 in just four days. Back on track!

So… I band for about 90 days in the fall, usually 8/1-10/31 (but most years I don't make it to Halloween because of cold and snow). A good fall for me is netting around 1600 birds. This year I'm already at 1400. Whew. (My busiest season was the fall I caught 2500 CHSP. That year I totaled about 4500 birds!)

Oh, and I've only banded about 15 Wilson's Warblers so far this fall. That will change.

More soon,
Steve Brown
Colo Spgs


Sent from my iPad

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[cobirds] Hummer ID help (Boulder)

Hi folks,

It's migrating hummingbird season at the Boulder Community Gardens at the moment.  I'd appreciate help with the ID of the attached bird. I'm torn between Black-chinned and Broad-tailed. The photos are of the same individual.

Reasons in favor of Black-chinned:

1. No visible rufous in the tail.  I saw the bird well with binoculars, but didn't get a photo of the bird in flight.
   
2. Limited rufous on flanks.
   
3. No white eye ring.
   
4. Grayish cap.
   
5. More vertical posture.
   

Reasons in favor of Broad-tailed:

1. Tail seems to extend further from wingtips than shown in Sibley.
   
2. Bill doesn't seem as curved as in Sibley.
   
3. Spots in cheeks.
   

Thanks,

Richard Trinkner

Boulder

[cobirds] Long-tailed Jaeger and Sabine's Gull (both adults) at Chatfield

Adult Long-tailed Jaeger at Chatfield.  White chest, black cap, dark wings with pencil thin, white primary shafts; pointed wings, thinner wings than nearby Ring-billed Gulls that it was chasing.

Seen from the marina sandspit, but it was near the outlet tower.  Look for the small flock of Ring-billed Gulls that are following a group of cormorants.

An adult Sabine's Gull is also being seen near this flock.

Joey Kellner
Littleton, Colorado

Joey.

Joey Kellner
Littleton, Colorado
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Re: [cobirds] Bird Conservancy of the Rockies - Barr Banding Station Report, 8/29/24

Barr Banding Station caught 29 Wilson's Warblers today.  I counted 19 Wilson's Warblers during a 39 minute birding session on the Canon City Riverwalk on Monday and the only other bird I saw was a White-breasted Nuthatch--I have never seen so many Wilson's in such a short period of time.  Hopefully these big pushes of Wilson's Warblers indicates they had a good breeding season this year.

SeEtta Moss 

Canon City 

On Thu, Aug 29, 2024, 7:06 PM meredith <meredithmcburney@gmail.com> wrote:

This was the best day of our season so far, with a much cooler morning and the first influx of Wilson's Warblers.  Caught a total of 41 new birds (our biggest day before today was 33):

Trail's Flycatcher 1

American Robin 1 (FOS)

Orange-crowned Warbler 1

Yellow Warbler 3

Townsend's Warbler 1 (FOS)

American Redstart 1 (FOS)

Northern Waterthrush 2

Wilson's Warbler 29 

Song Sparrow 1

Lincoln's Sparrow 1

Yellow Warblers and House Wren, perhaps our two most common summer residents, remain well below normal, but, if today is any indication, Wilson's Warblers, our most commonly caught species, may be doing okay.  So the story may be changing a bit.  

We are banding Tuesday through Sunday mornings (closed Mondays).  There is a public session most weekday mornings from 7:30-8:30, and three time slots on weekends, at 8, 9, and 10 a.m. There is a $7 fee and registration is required – click here to register!

Let me know if you have any questions,

Meredith McBurney
Bander - Barr Lake Banding Station
Bird Conservancy of the Rockies

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[cobirds] Bird Conservancy of the Rockies - Barr Banding Station Report, 8/29/24

This was the best day of our season so far, with a much cooler morning and the first influx of Wilson's Warblers.  Caught a total of 41 new birds (our biggest day before today was 33):

Trail's Flycatcher 1

American Robin 1 (FOS)

Orange-crowned Warbler 1

Yellow Warbler 3

Townsend's Warbler 1 (FOS)

American Redstart 1 (FOS)

Northern Waterthrush 2

Wilson's Warbler 29 

Song Sparrow 1

Lincoln's Sparrow 1

Yellow Warblers and House Wren, perhaps our two most common summer residents, remain well below normal, but, if today is any indication, Wilson's Warblers, our most commonly caught species, may be doing okay.  So the story may be changing a bit.  

We are banding Tuesday through Sunday mornings (closed Mondays).  There is a public session most weekday mornings from 7:30-8:30, and three time slots on weekends, at 8, 9, and 10 a.m. There is a $7 fee and registration is required – click here to register!

Let me know if you have any questions,

Meredith McBurney
Bander - Barr Lake Banding Station
Bird Conservancy of the Rockies

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[cobirds] Cherry Creek Reservoir -- Sept 2!

Co-birders . . ..

It's that time gain (although this note is going on late):  Time to bird around Cherry Creek Reservoir —the fifth annual Labor Day Circum-Lake-Ation at Cherry Creek State Park. Given the rise in the lake level this year, it will be very interesting to see what changes there have been in bird-life (e.g., "Pelican Point" is virtually gone).

The day begins at Tower 6:30am, and heads clockwise around the lake. Folks can go the whole route, or check-out as they need. The whole walk is about 11 miles, so come prepared with food and water (and sunscreen)

We've often had a "shuttle" from the 12-mile Picnic Area  back to Tower Loop. My hope is that we'll be able to do something similar this year (as 12-mile picnic area access is blocked off the last I checked).

This is not any kind of "official" outing. I started it during COVID as something to do on Labor Day. Now it's habit!

If you're interested in joining me, have questions, etc., send me an email at this address. Or my cell is 303-501-6659.

Bird on!

Gary Brower

[cobirds] Bird Conservancy of the Rockies - Barr Banding Station Report, 8/28/24

We banded 14 birds today, keeping us ahead of last year's super-slump, but well below the 5-year average for this time of year at the old station.   We had a fairly nice stream of birds early on, and then, of course, it got hot again - we closed about a third of our nets early due to heat.  I went back and looked at last year's temperatures, and it was 10-15 degrees cooler at this time; that probably impacts the actual number of birds and how active they are.  Unfortunately, the forecast is for continued hot weather.........

Here are today's 14 new birds (we also recaught 6 birds banded earlier this season):

Black-capped Chickadee 1

Yellow Warbler 1

Common Yellowthroat 1

Wilson's Warbler 9

Yellow-breasted Chat 1

American Goldfinch 1

We are banding Tuesday through Sunday mornings (closed Mondays).  There is a public session most weekday mornings from 7:30-8:30, and three time slots on weekends, at 8, 9, and 10 a.m. There is a $7 fee and registration is required – click here to register!

Let me know if you have any questions,

Meredith McBurney
Bander - Barr Lake Banding Station
Bird Conservancy of the Rockies

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[cobirds] Sept 1: First Sunday Bird Watching at Greenlee Wildlife Preserve, Lafayette

Everyone, including beginning birders, are invited to experience the fun and discovery of bird watching at the Greenlee Wildlife Preserve on the first Sunday of each month year-round. Knowledgeable bird watchers will be on hand with binoculars, spotting scopes, and learning tools to assist in the fun activity of identifying birds in their natural habitats.

No RSVP required - drop by anytime between the hours of 1:00 and 3:00 PM. Park in Waneka Lake lot and walk around the lake to Greenlee or park on nearby Waneka Lake Trail. Make sure to bring water and stay hydrated.

For more information on the Sept 1 event: https://www.boulderaudubon.org/all-events/lafayette-birds-first-sunday-bird-watching-sept-2024

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[cobirds] BCAS Field Trip: Old St. Vrain Road, Aug 30

Join local birder Carl Starace to bird along Old St. Vrain Road.  Possible birds are Wild Turkey, Canyon Wren, Gray Catbird, Plumbeous Vireo, Violet Green Swallow.

Friday, Aug 30
7:30 am - 10:30 am

Limit 18. For more information and to sign up: https://www.boulderaudubon.org/all-events/old-st-vrain-road-carl-starace-august-2024

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[cobirds] BCAS Field Trip: Wings and Songs - Birdwatching and Music, Sept 1

Mozart had a pet starling. Sibelius identified personally with swans. Beethoven, Handel and Vivaldi all wrote duets for nightingales and cuckoos, and Dvorak is said to have written the song of the Scarlet Tanager on his shirt cuff.

Join naturalist Dave Sutherland at Walden Ponds to explore ways that composers of classical music captured the essence of birds. Beautiful bird-themed musical selections and amazing bird viewing guaranteed.

This field trip is jointly sponsored by Boulder County Audubon Society and the Boulder Philharmonic Orchestra as part of the Musical Hikes program.

Sunday, September 1
9 am - 11 am

Limit 20. For more information and to sign up: https://www.boulderaudubon.org/all-events/wings-and-songs-birdwatching-and-music-sept-2024

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[cobirds] Bird Conservancy of the Rockies - Barr Banding Station Report, 8/25 & 8/27/24

Let's see.......Sunday, 8/25, was so slow I didn't even want to think about it......only 8 birds banded:

Western Wood-pewee 1

House Wren 3

Common Yellowthroat 2

Wilson's Warbler 1

Song Sparrow 1

Then, on my day off, I started thinking about my decision to use an average of the last 5 years to measure how well we were performing this season at the new station.  Last year was the worst in over a decade, and I decided to take a look at how this year was fairing compared to that.  

And, we are, after five days, slightly ahead of where we were last year.  So,  I will be thinking about whether we are starting to come out of last year's super-slump as well as a longer term picture and the impact of the move.  

The biggest change so far appears to be a continued decrease in Yellow Warblers.  Down last year, and indications so far are they will be down further this season.  

So, here are today's totals, on another hot, humid day, 23 birds:

Mourning Dove 1

Downy Woodpecker 1

Western Wood-pewee 1

Trail's Flycatcher 1

Dusky Flycatcher 2

House Wren 5

Orange-crowned Warbler 1 (FOS)

Yellow Warbler 1

MacGillivray's Warbler 1

Common Yellowthroat 2

Wilson's Warbler 7

We are banding Tuesday through Sunday mornings (closed Mondays).  There is a public session most weekday mornings from 7:30-8:30, and three time slots on weekends, at 8, 9, and 10 a.m. There is a $7 fee and registration is required – click here to register!

Let me know if you have any questions,

Meredith McBurney
Bander - Barr Lake Banding Station
Bird Conservancy of the Rockies

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

An even slower day; perhaps due to the heat, maybe due in part to the Cooper's Hawk who was patrolling our most southern nets and got caught in our 9 a.m. run.  Made for an exciting mid-morning for visitors, volunteers and staff.

As we start looking at first week numbers, we are short on our most common early birds, both of which breed at Barr - Yellow Warblers and House Wrens.  

Here's the breakdown of today's 14 new birds:

Cooper's Hawk 1

Mourning Dove 1

Downy Woodpecker 1

Western Wood-pewee 2

Western Flycatcher 1

House Wren 4

Yellow Warbler 1

Common Yellowthroat 3 

There are slots open for visitors tomorrow,  Sunday, at 8, 9 and 10 a.m.  Next week we have weekday sessions (Tues-Fri, closed Mon) at 7:30.  There is a $7 fee and registration is required – click here to register!

Let me know if you have any questions,

Meredith McBurney
Bander - Barr Lake Banding Station
Bird Conservancy of the Rockies

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[cobirds] Bird Conservancy of the Rockies - Barr Banding Station Report, 8/23/24

A warmer, slower, quieter day. Twenty-two new birds, compared with 33 yesterday, and very typical species for this time of  year:

Western Wood-pewee 1

Willow Flycatcher 1

Warbling Vireo 1

Black-capped Chickadee 1

White-breasted Nuthatch 1, banded last year on 9/28 at the "historic" banding station

House Wren 2

Yellow Warbler 8

MacGillivray's Warbler 2

Common Yellowthroat 1

Wilson's Warbler 3

Song Sparrow 1

Weekend visitor hours start tomorrow, with sessions at 8 and 9 a.m.  On weekdays (Tues-Fri, closed Mon) we have one session at 7:30.  There is a $7 fee and registration is required – click here to register!

Let me know if you have any questions,

Meredith McBurney
Bander - Barr Lake Banding Station
Bird Conservancy of the Rockies

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[cobirds] Westminster magpies!

While driving east on highway 36 on Thursday evening , I saw a flock of at least 50 magpies gathered near the Church Ranch exit.  They were sitting in trees, bushes and on the ground.  There is a patch of open space here and  a prairie dog town.

Paula Hansley

Louisville 

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

We had a perfectly lovely first day of banding at our new station at Barr. Enough birds to get a sense of how the station will work without being overwhelmed.  And a lovely mix - 33 birds of 15 species, including 5 warblers, one of which is rarish for Barr (see photo).

Here's the breakdown:

Western Wood-pewee 1

Dusky Flycatcher 1

Western Flycatcher 1

Warbling Vireo 1

House Wren 7

Yellow Warbler 6

Black and White Warbler 1

MacGillivray's Warbler 1

Common Yellowthroat 2

Wilson's Warbler 4

Yellow-breasted Chat 1

Song Sparrow 3

Lazuli Bunting 1

Bullock's Oriole 1

American Goldfinch 2

We'd love to share this combination of year-round birds, summer residents and early fall migrants with you!  Weekend visitor hours start this Saturday, with sessions at 8, 9, and 10.  On weekdays (Tues-Fri, closed Mon) we have one session at 7:30.  There is a $7 fee and registration is required – click here to register!

Let me know if you have any questions,

Meredith McBurney
Bander - Barr Lake Banding Station
Bird Conservancy of the Rockies

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RE: [cobirds] cool observations in hot weather (Bldr Cnty)

Interesting post, Linda.

 

Caching seeds from natural sources or feeders as a winter seed supply supplement is a major activity of all our nuthatch species at this time of year.  Two things strike me about this: (1) it has to be a strategy evolved as a hedge against the unreliability of local conifer and other seed crops that, when available, constitute the bulk of nuthatch winter food.  In the case of conifers, a “bumper” crop only happens every 3-5 years, and (2) amounts to a “throw stuff at the wall and hope some of it sticks” type of activity, given the amount of poaching from other seed-eating birds and tree squirrels.  I would love to know what % of seeds stored away by an individual nuthatch the providing nuthatch actually gets to eat.  I would wager it is very low.  Given that suspicion, I have often wondered if the frenzy of activity it involves for weeks and weeks, multiple trips from source to sink per hour, how this caching can be worth it.  One assumes it has to be or they wouldn’t do it but the “profit margin” can’t be large.  I think birds are like most of us living paycheck to paycheck and clipping coupons.  If you’re a gull that knows the way to the San Jose (or other) landfill, different deal.

 

As for the blue grosbeaks starting a nest at this time of year, that seems pretty normal for a double-brooded species.  I do not think it necessarily implies a problem with the first 2024 nesting attempt.

 

You mention Kentucky coffeetree (Gymnocladus dioicus), which is native to the eastern U.S. and being planted more and more in Colorado urban areas.  It seems to do well here and I used to think it was one of these “plastic” trees with few insects or body parts fed upon by local birds or other wildlife (i.e., of little ecological value).  But in recent years fox squirrels are becoming increasingly fond of extracting beans from the seed pods, sort of the way they have been doing with honeylocust and other legumes for decades.  If anybody sees a bird eating coffeetree beans, I’d like to hear the details.  Of course, this tree is not related to the true coffee trees (Coffea caniphora variety arabica and C. c. variety robusta, mostly) but the beans were roasted by native peoples and early Europeans in N.A. as a coffee substitute.

 

Dave Leatherman

Fort Collins

 

From: 'Linda Andes-Georges' via Colorado Birds <cobirds@googlegroups.com>
Sent: Thursday, August 22, 2024 12:04 PM
To: Co-birds <cobirds@googlegroups.com>
Subject: [cobirds] cool observations in hot weather (Bldr Cnty)

 

Hello, birdwatchers (those who twitch and those who do not):

 

This past week as the heat continued despite blessedly cloudy late afternoons, I noticed two behaviors odd enough that I had to resort to the reference books to find out what was going on.

 

The first I'm sure most of you have already noticed, but I'm late to this party: Our local WB Nuthatch pair began raids on a fairly frantic level of the birdseed I throw on our deck (in my case, purely to establish the kitty-TV programming for the day-- and they also enjoy the mouse-watching channel).

 

The nuthatches were coming and going regularly and at first I thought maybe they were feeding chicks, but when I had time to observe closely, I could see that they took each seed to a favorite tree (Kentucky coffee with its nicely grooved bark), Japanese sophora, with its trunk cleavages, and plains cottonwood, also, groovy bark). Then they would march around on the branches until they found a fissure suitable for seed storage. Lots of noisy pounding, then a return trip to the deck. I had no idea they were such seed-eaters in winter, or that they dedicated their hunting in August to this degree.

 

The other odd behavior that made me consult the good ole CO Atlas, was that of a female Blue Grosbeak. On Aug. 20, no sooner, she was gathering nesting material among our wildflowers. I'm used to hearing the grosbeaks singing and chink-calling in late summer or early fall, but starting over with a brood? We speculated that the first nest had been blown down thanks to the high winds in these storm cells. 

 

Talk about resilient nature...

 

 

Linda

 

 

Personal landcape: Now known as Boulder County (CO). We nest in shortgrass prairie whose caretakers for centuries were the Hinóno’éí (Arapaho) and Cheyenne Nations. Colorado’s Front Range is also home to The Ute & many other Native peoples. Reconozco que vivo en el territorio de las naciones Hinóno’éí (Arapaho) y Cheyenne, según el 1851 Tratado de Fort Laramie; y que el estado de Colorado al esté de las Montañas Rocosas es territorio de Utes y muchos otros pueblos indígenas

 

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[cobirds] cool observations in hot weather (Bldr Cnty)

Hello, birdwatchers (those who twitch and those who do not):

This past week as the heat continued despite blessedly cloudy late afternoons, I noticed two behaviors odd enough that I had to resort to the reference books to find out what was going on.

The first I'm sure most of you have already noticed, but I'm late to this party: Our local WB Nuthatch pair began raids on a fairly frantic level of the birdseed I throw on our deck (in my case, purely to establish the kitty-TV programming for the day-- and they also enjoy the mouse-watching channel).

The nuthatches were coming and going regularly and at first I thought maybe they were feeding chicks, but when I had time to observe closely, I could see that they took each seed to a favorite tree (Kentucky coffee with its nicely grooved bark), Japanese sophora, with its trunk cleavages, and plains cottonwood, also, groovy bark). Then they would march around on the branches until they found a fissure suitable for seed storage. Lots of noisy pounding, then a return trip to the deck. I had no idea they were such seed-eaters in winter, or that they dedicated their hunting in August to this degree.

The other odd behavior that made me consult the good ole CO Atlas, was that of a female Blue Grosbeak. On Aug. 20, no sooner, she was gathering nesting material among our wildflowers. I'm used to hearing the grosbeaks singing and chink-calling in late summer or early fall, but starting over with a brood? We speculated that the first nest had been blown down thanks to the high winds in these storm cells. 

Talk about resilient nature...

Linda

Personal landcape: Now known as Boulder County (CO). We nest in shortgrass prairie whose caretakers for centuries were the Hinóno'éí (Arapaho) and Cheyenne Nations. Colorado's Front Range is also home to The Ute & many other Native peoples. Reconozco que vivo en el territorio de las naciones Hinóno'éí (Arapaho) y Cheyenne, según el 1851 Tratado de Fort Laramie; y que el estado de Colorado al esté de las Montañas Rocosas es territorio de Utes y muchos otros pueblos indígenas

[cobirds] Next BIRD BOMBS: Assfeet Sept 12 and video of BIRD BOMBS: Colorado Plovers

The video of the latest BIRD BOMBS: Colorado Plovers is available for viewing (due to an editing issue there is about 5 minutes of just the first slide before the presentation begins, so please just advance to 5:00 minutes). All 29 episodes of BIRD BOMBS are in the Denver Field Ornithologists' BIRD BOMBS video library.  They are also available on DFO's Youtube channel, too!  

Register now for the next BIRD BOMBS: Assfeet due to explode on September 12 at 7 pm Mountain time. Explore the identification of Colorado's grebes. See the attached slide for an explanation of the name, and pardon my French, as they say :-). 

David Suddjian

Littleton, CO

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[cobirds] Re: Barn Owl, night migrants east of Louisville

In the San Luis Valley, the very few Barn Owls we have in fair seasons are pretty much gone in winter. I only have one winter record and I believe the rest leave the area for warmer temps down the Rio Grande. 

John Rawinski

Monte Vista, CO

On Tuesday, August 13, 2024 at 9:21:17 AM UTC-6 Paula Hansley wrote:

CObirders,

While watching for Perseids and looking for the Aurora early (2-4:30 am) this morning, I heard several very interesting bird calls near Coal Creek, including a raspy Barn Owl, Wild Turkey, and an Upland Sandpiper, Lesser Yellowlegs, and possible Solitary Sandpiper(Merlin?) calling while flying overhead when thr clouds obscured the sky about 4 am.. 

Paula Hansley 

Boulder County

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Re: [cobirds] Birder Challenge Counties Available

Okay...Thanks Chuck!

On Wednesday, August 21, 2024 at 8:41:12 AM UTC-6 Charles Hundertmark wrote:

CFO has a new registration system for the Colorado Birding Challenge this year, and we haven't yet found a way to make visible which counties have teams. There is currently one team signed up for Conejos County. Other than that, it is unlikely that there will be many teams birding in your part of the state, so you could pretty much pick your preferred county. And there is no reason more than one team can't bird a county. Of course, we would like to have as many counties covered as we can. But concerns about which counties are taken should not interfere with the other goals of raising funds for CFO and a bird conservation project and, most important, having a great day birding with your birding friends.

Chuck Hundertmark

On Aug 21, 2024, at 8:05 AM, mvjo...@gmail.com <mvjo...@gmail.com> wrote:

I tried to find the location that showed which counties were still available. Had no luck. Someone know where I could find it?  I did not want to register if there were not any available in my area. Thanks. 

Smith Reservoir was popping with migrants. Five species of warblers and a gazillion sparrows. A total of 45 species, including 2 Wood Ducks. 

John Rawinski

'Monte Vista, CO

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Re: [cobirds] Birder Challenge Counties Available

CFO has a new registration system for the Colorado Birding Challenge this year, and we haven't yet found a way to make visible which counties have teams. There is currently one team signed up for Conejos County. Other than that, it is unlikely that there will be many teams birding in your part of the state, so you could pretty much pick your preferred county. And there is no reason more than one team can't bird a county. Of course, we would like to have as many counties covered as we can. But concerns about which counties are taken should not interfere with the other goals of raising funds for CFO and a bird conservation project and, most important, having a great day birding with your birding friends.

Chuck Hundertmark

On Aug 21, 2024, at 8:05 AM, mvjo...@gmail.com <mvjohnski@gmail.com> wrote:

I tried to find the location that showed which counties were still available. Had no luck. Someone know where I could find it?  I did not want to register if there were not any available in my area. Thanks. 

Smith Reservoir was popping with migrants. Five species of warblers and a gazillion sparrows. A total of 45 species, including 2 Wood Ducks. 

John Rawinski

'Monte Vista, CO

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[cobirds] Birder Challenge Counties Available

I tried to find the location that showed which counties were still available. Had no luck. Someone know where I could find it?  I did not want to register if there were not any available in my area. Thanks. 

Smith Reservoir was popping with migrants. Five species of warblers and a gazillion sparrows. A total of 45 species, including 2 Wood Ducks. 

John Rawinski

'Monte Vista, CO

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Re: [cobirds] bird id help boulder county gross reservoir area

Northern goshawks are a much more bulky bird .juvenile  Goshawks have thicker vertical streaking on the chest and belly.  Goshawks have a light superciliary line, and have large white  undertail coverts 

On Mon, Aug 19, 2024 at 2:31 PM <jhmoss@gmail.com> wrote:

August 19, 2024 2:31 PM

 

What gave it away?

 

Jim Moss

From: cobirds@googlegroups.com <cobirds@googlegroups.com> On Behalf Of Scott Rashid
Sent: Monday, August 19, 2024 11:08 AM
To: Pieter Strauss <pstrauss451@gmail.com>
Cc: Colorado Birds <cobirds@googlegroups.com>
Subject: Re: [cobirds] bird id help boulder county gross reservoir area

 

Coopers

 

On Mon, Aug 19, 2024 at 11:07 AM Pieter Strauss <pstrauss451@gmail.com> wrote:

 

I'm bad with raptors. I'm guessing that it is a juvenile Northern Goshawk.
Raptors I have identified in my backyard are American Kestrels, Sharp shinned Hawks, Bald  Eagles, Redtailed Hawks, Ospreys-- but this one's got me stumped.
Size is larger than a Sharp shinned, but, I think, smaller than a Redtailed.
Any clues greatly appreciated.
BTW it appears to be missing a leg.

--Pieter

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[cobirds] Bird banding at Barr Lake this fall...........

As most of you know, Bird Conservancy has needed to move the location of its long-term banding station at Barr Lake this year because of the work being done by the Farmers Reservoir and Irrigation Company (FRICO) to reinforce the dike on the eastern border of the reservoir.

The 2024 station will be located in an area off of the Niedrach Trail; instead of going right after you cross the bridge over the canal, you go left and follow the signs; it is a short ¼ mile walk.  As disappointed as we are to be ending our streak of banding at the same location for decades (we even managed to run the station successfully the year of Covid), we are intrigued to see what difference, if any, a half mile and somewhat more protected habitat will make.

Developing a new banding set-up is no small task – making decisions about how many nets, choosing locations that we hope will give us a good mix of bird species but not interfere with other Park activities/priorities, clearing brush, etc.  We – Bird Conservancy staff and what may be the world's best volunteer team – have spent the past week doing that.  Now, we can't wait to find out how good our guesses were! 

As always, we want to share the experience will all of you!  Our system for visitors has not changed - there will be a 7:30-8:30 session each weekday morning (Tues-Fri, closed on Mon), and three sessions   - at 8, 9, and 10 on weekends.  The first day for visitors is this coming Saturday, 8/24, and we will run through 10/23.  There is a $7 fee and registration is required – click here to register!

Let me know if you have any questions,

Meredith McBurney
Bander - Barr Lake Banding Station
Bird Conservancy of the Rockies

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Re: [cobirds] More magpies!

Growing up in Englewood in the Denver suburbs in the 1960's, we had plenty of Black-billed Magpies at our house.  They spent lots of time poking around the lawn looking for food.  We had a pet collie, and the magpies seemed to particularly relish teasing her, landing on the lawn near her and then taking off at the last possible minute as she tried to catch them.  This was repeated constantly, providing exercise and stimulation for both species I imagine.

Jim Nelson

Bethesda, MD

On Monday, August 19, 2024 at 03:07:05 PM EDT, carolmccasland via Colorado Birds <cobirds@googlegroups.com> wrote:

I have been reluctant to add my comments, but so many have shared their wonderful stories of Black-billed Magpies, I have to chime in.  I am a volunteer at the Denver Zoo.  A pair of BB Magpies have nested in a tree that stands between a yard of ungulates and a yard where African Wild Dogs reside.  This summer, I watched as 2 adult magpies and 4 juvies cavorted in the Wild Dog habitat, picking up bits left over from a feeding for the dogs.  The dogs repeatedly charged at the birds, but weren't successful in grabbing any!  It was especially fun to watch our 3-legged dog join in the chase!  This was all enrichment the keepers probably hadn't thought up!

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