Re: [cobirds] late warblers in CO

[Willem van Vliet]

Great questions!  Christiaan Both (Groningen University) has been examining
some of them. See, for example:
https://research.rug.nl/en/publications/climate-change-breeding-date-and-nestling-diet-how-temperature-di


Willem

On Fri, Dec 2, 2022 at 3:44 PM DAVID A LEATHERMAN 
wrote:

> Kudos to Lori Z. in Fort Collins for finding a very late Northern
> Waterthrush along the Poudre which was warbler species #19 on my draft list
> for CO since November 1, 2022.  Brandon and Tyler have added Cape May and
> American Redstart, respectively, for a total so far of 21.  People fluent
> in eBird archives can probably find a palm record for CO since November 1
> and I seem to recall a bay-breasted in nw CO (or was that October?).
>
> Whatever the total is, it's almost as good as what we get during the
> supposed "primetimes" of late May and September.  And I'd love to know the
> reason for the late flush of these individuals that "didn't get the memo"
> about when it's best to migrate.  Are they mostly first-time migrants (i.e.
> young born last summer) from late-starting first or second nests?  Are they
> just not wired correctly?  Are the late adults we see individuals that
> didn't nest at all, or that had failed nests, late nests, or what?  I was
> sent a NYT article that makes the case for various species of forest
> rodents that feed on forest tree seeds in Maine having different
> personalities.  Why not birds?  Are some birds simply procrastinators?  Are
> more late migrants these days surviving than would have been the case "in
> the old days" because current late autumn weather tends to be milder?  Do
> they pass on this timing to their offspring next summer?  Is a
> proliferation of urban plantings that support the kind of foods needed to
> pull off a late migration part of it?  Maybe it just *seems* like there
> are more late migrants because more of us are looking than used to be the
> case (see David Suddjian's recent graphs of increasing eBird checklists).
> Lots of questions begging answers.
>
> Dave Leatherman
> Fort Collins
>
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> .
>


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Re: [cobirds] late warblers in CO

[Todd Deininger]

Palm Warbler, Nov 13, 2011 Boulder City

On Fri, Dec 2, 2022, 3:44 PM DAVID A LEATHERMAN 
wrote:

> Kudos to Lori Z. in Fort Collins for finding a very late Northern
> Waterthrush along the Poudre which was warbler species #19 on my draft list
> for CO since November 1, 2022.  Brandon and Tyler have added Cape May and
> American Redstart, respectively, for a total so far of 21.  People fluent
> in eBird archives can probably find a palm record for CO since November 1
> and I seem to recall a bay-breasted in nw CO (or was that October?).
>
> Whatever the total is, it's almost as good as what we get during the
> supposed "primetimes" of late May and September.  And I'd love to know the
> reason for the late flush of these individuals that "didn't get the memo"
> about when it's best to migrate.  Are they mostly first-time migrants (i.e.
> young born last summer) from late-starting first or second nests?  Are they
> just not wired correctly?  Are the late adults we see individuals that
> didn't nest at all, or that had failed nests, late nests, or what?  I was
> sent a NYT article that makes the case for various species of forest
> rodents that feed on forest tree seeds in Maine having different
> personalities.  Why not birds?  Are some birds simply procrastinators?  Are
> more late migrants these days surviving than would have been the case "in
> the old days" because current late autumn weather tends to be milder?  Do
> they pass on this timing to their offspring next summer?  Is a
> proliferation of urban plantings that support the kind of foods needed to
> pull off a late migration part of it?  Maybe it just *seems* like there
> are more late migrants because more of us are looking than used to be the
> case (see David Suddjian's recent graphs of increasing eBird checklists).
> Lots of questions begging answers.
>
> Dave Leatherman
> Fort Collins
>
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> 
> .
>

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Re: [cobirds] late warblers in CO

[Marty W]

 Thank you as always, Dave Leatherman! I (and so many) always love your
observations, photos, explanations & information, and especially (as here)
your musings & speculations (based as they are on science and an
experienced, open & inquiring mind)!! Always sharp & insightful.

Marty Wolf
NW CO Spgs

On Fri, Dec 2, 2022 at 10:44 PM DAVID A LEATHERMAN 
wrote:

> Kudos to Lori Z. in Fort Collins for finding a very late Northern
> Waterthrush along the Poudre which was warbler species #19 on my draft list
> for CO since November 1, 2022.  Brandon and Tyler have added Cape May and
> American Redstart, respectively, for a total so far of 21.  People fluent
> in eBird archives can probably find a palm record for CO since November 1
> and I seem to recall a bay-breasted in nw CO (or was that October?).
>
> Whatever the total is, it's almost as good as what we get during the
> supposed "primetimes" of late May and September.  And I'd love to know the
> reason for the late flush of these individuals that "didn't get the memo"
> about when it's best to migrate.  Are they mostly first-time migrants (i.e.
> young born last summer) from late-starting first or second nests?  Are they
> just not wired correctly?  Are the late adults we see individuals that
> didn't nest at all, or that had failed nests, late nests, or what?  I was
> sent a NYT article that makes the case for various species of forest
> rodents that feed on forest tree seeds in Maine having different
> personalities.  Why not birds?  Are some birds simply procrastinators?  Are
> more late migrants these days surviving than would have been the case "in
> the old days" because current late autumn weather tends to be milder?  Do
> they pass on this timing to their offspring next summer?  Is a
> proliferation of urban plantings that support the kind of foods needed to
> pull off a late migration part of it?  Maybe it just *seems* like there
> are more late migrants because more of us are looking than used to be the
> case (see David Suddjian's recent graphs of increasing eBird checklists).
> Lots of questions begging answers.
>
> Dave Leatherman
> Fort Collins
>
> --
> --
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> bird species and location in the subject line when appropriate
> * Join Colorado Field Ornithologists https://cobirds.org/CFO/Membership/
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> 
> .
>

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[cobirds] Re: Upper Texas Coast trip with Boulder Co. Audubon

[mvjo...@gmail.com]

2023right?

On Monday, November 28, 2022 at 3:32:01 PM UTC-7 goldene...@gmail.com wrote:

> This trip is offered through Boulder County Audubon's, "Interludes With 
> Nature" series of special fundraising outings.  The monies raised are used 
> to support scholarships for our Teen Naturalist Program.  Each year, we 
> send 2-3 promising young naturalists to National Audubon's Hog Island Camp 
> off the coast of Maine, where luminaries such as Kenn Kaufman and Scott 
> Weidensaul lead seminars.  
>
> Upper Texas Coast: Migration Birding With the Best
>
> Leaders: Bill Kaempfer and John Vanderpoel
> Dates: Friday, April 14, 2022 to Saturday, April 22, 2022
> Fees: $1595 per person, double occupancy, +$500 single premium ($500 
> deposit upon registering, balance due by January 20)
> Limited to 8 people, location is birding hot spots surrounding Winnie, 
> Texas
> Registration: Please see How to Register for an Interludes Trip 
>  to 
> register. 
>
> Join elite birders, John Vanderpoel and Bill Kaempfer, for eight nights 
> and seven full days of birding during spring migration on the Upper Texas 
> Coast.  We will bird all of the famous hotspots including High Island, 
> Anahuac National Wildlife Refuge, Sabine Woods, Bolivar Peninsula, Boykin 
> Springs (Big Thicket National Preserve), and more. 
>
> Expect to see up to 200 species including 25-30 warblers; shorebirds, 
> waders, and rails; Brown-headed Nuthatch, Red-cockaded Woodpecker, 
> Bachman’s, Nelson’s and Seaside Sparrows and much, much more. Questions? 
> Email John Vanderpoel at: jvand...@peregrinevideo.co
>
> The fee of $1595.00 (double occupancy, single premium, +$500) includes all 
> transportation during your stay, admission fees, 8 nights of lodging, and 2 
> stellar leaders (who are volunteering their time!). 
>
> We gather on Friday, April 14th, after 2 p.m., at a hotel close to *Bush 
> Intercontinental Airport, “Staybridge Suites, Houston IAH Airport East”* 
> (free shuttle). On Saturday morning, April 15th, the leaders will arrive at 
> the hotel with a 15 passenger van to begin the birding trip. Saturday 
> evening, April 15, everyone will check into the Comfort Inn and Suites at 
> Winnie, TX for 7 nights. *EXCLUDED* is airfare to Bush Intercontinental 
> Airport and meals (other than breakfasts which are provided at the hotels). 
> Please note, if you want to fly into Hobby Airport, you must make your own 
> way to Staybridge Suites on Friday the 14th and then back to Hobby from 
> Bush IAH on Saturday, April 22.
>
> -- 
> Todd Deininger
> Longmont, CO
>
> Latest on Flickr 
> youtube.com/@DeiningerProductions
>
>
> "Someone who thinks logically is a nice contrast to the real world."
> -- unknown
>

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[cobirds] late warblers in CO

[DAVID A LEATHERMAN]

Kudos to Lori Z. in Fort Collins for finding a very late Northern Waterthrush 
along the Poudre which was warbler species #19 on my draft list for CO since 
November 1, 2022.  Brandon and Tyler have added Cape May and American Redstart, 
respectively, for a total so far of 21.  People fluent in eBird archives can 
probably find a palm record for CO since November 1 and I seem to recall a 
bay-breasted in nw CO (or was that October?).

Whatever the total is, it's almost as good as what we get during the supposed 
"primetimes" of late May and September.  And I'd love to know the reason for 
the late flush of these individuals that "didn't get the memo" about when it's 
best to migrate.  Are they mostly first-time migrants (i.e. young born last 
summer) from late-starting first or second nests?  Are they just not wired 
correctly?  Are the late adults we see individuals that didn't nest at all, or 
that had failed nests, late nests, or what?  I was sent a NYT article that 
makes the case for various species of forest rodents that feed on forest tree 
seeds in Maine having different personalities.  Why not birds?  Are some birds 
simply procrastinators?  Are more late migrants these days surviving than would 
have been the case "in the old days" because current late autumn weather tends 
to be milder?  Do they pass on this timing to their offspring next summer?  Is 
a proliferation of urban plantings that support the kind of foods needed to 
pull off a late migration part of it?  Maybe it just seems like there are more 
late migrants because more of us are looking than used to be the case (see 
David Suddjian's recent graphs of increasing eBird checklists).  Lots of 
questions begging answers.

Dave Leatherman
Fort Collins

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[cobirds] Boulder Evening Grosbeaks

[Alan Bell]

Flock of 25 Evening Grosbeaks scratching in the leaves in our year north of 
Boulder.

Alan Bell
Boulder

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