| SFBirds |
| Received |
From |
Subject |
| 7/17/25 11:22 am |
Dominik Mosur via groups.io <dominikmosur...> |
[SFBirds] cont. A. Redstart, breeding notes, arrivals |
| 7/14/25 11:28 am |
Dominik Mosur via groups.io <dominikmosur...> |
[SFBirds] NAZCA Booby Alcatraz 7/14/25 |
| 7/13/25 7:59 am |
David Assmann via groups.io <david_assmann...> |
[SFBirds] Northern Parula continues |
| 7/12/25 1:46 pm |
David Assmann via groups.io <david_assmann...> |
[SFBirds] Local Interest - Dispersing Birds and Returning Shorebirds |
| 7/9/25 6:31 pm |
San Mateo County Bird Alliance via groups.io <office...> |
[SFBirds] Tomorrow Night's Monthly Meeting - Wildlife Photography |
| 7/3/25 7:04 am |
Dominik Mosur via groups.io <dominikmosur...> |
[SFBirds] Continuing MAGNOLIA and AMERICAN REDSTART @ Pine Lake 7/3/25 |
| 7/2/25 7:02 am |
Dominik Mosur via groups.io <dominikmosur...> |
[SFBirds] Magnolia Warbler continues 7/2/25 |
| 6/30/25 10:02 pm |
Aaron Maizlish via groups.io <amm.birdlists...> |
Re: [SFBirds] Magnolia warbler continues |
| 6/30/25 12:04 pm |
Sally M. Walters via groups.io <bajaowl...> |
Re: [SFBirds] Magnolia warbler continues |
| 6/30/25 11:49 am |
Liam Murphy via groups.io <liammsf...> |
[SFBirds] WHITE PELICANS at Crissy |
| 6/30/25 11:02 am |
Nancy Palmer via groups.io <nancy_palmer...> |
[SFBirds] Magnolia warbler continues |
| 6/30/25 7:42 am |
Brian Fitch via groups.io <fogeggs...> |
[SFBirds] Magnolia |
| 6/29/25 10:19 am |
Dominik Mosur via groups.io <dominikmosur...> |
[SFBirds] MAGNOLIA Warbler @ Pine Lake 6/29/25 |
| 6/26/25 11:57 am |
sf_colleen via groups.io <sf_colleen...> |
Re: [SFBirds] American Dipper at McClaren continuing |
| 6/26/25 11:48 am |
sf_colleen via groups.io <sf_colleen...> |
Re: [SFBirds] American Dipper at McClaren continuing |
| 6/26/25 11:04 am |
Steve Kaye via groups.io <stevekaye...> |
Re: [SFBirds] American Dipper at McClaren continuing |
| 6/26/25 7:46 am |
Whitney Grover via groups.io <wlgrover...> |
Re: [SFBirds] American Dipper at McClaren continuing |
| 6/26/25 7:19 am |
Liam Murphy via groups.io <liammsf...> |
[SFBirds] AMERICAN REDSTART Bernal Hill |
| 6/25/25 12:17 pm |
Nancy Palmer via groups.io <nancy_palmer...> |
[SFBirds] American Dipper at McClaren continuing |
| 6/25/25 7:49 am |
C Lou via groups.io <cdlou37...> |
[SFBirds] American dipper at mcnab lake in SF |
| 6/25/25 7:35 am |
C Lou via groups.io <cdlou37...> |
Re: [SFBirds] Southern Waterfront breeding bird miscellany |
| 6/25/25 6:35 am |
Eddie Bartley via groups.io <eddie...> |
Re: [SFBirds] Southern Waterfront breeding bird miscellany |
| 6/24/25 2:26 pm |
Liam Murphy via groups.io <liammsf...> |
Re: [SFBirds] Southern Waterfront breeding bird miscellany |
| 6/22/25 10:19 pm |
gene_ggaschat via groups.io <gene_ggaschat...> |
Re: [SFBirds] Southern Waterfront breeding bird miscellany |
| 6/22/25 11:26 am |
Bob Hall via groups.io <bilgepump100...> |
Re: [SFBirds] Southern Waterfront breeding bird miscellany |
| 6/21/25 7:39 pm |
Liam Murphy via groups.io <liammsf...> |
Re: [SFBirds] Southern Waterfront breeding bird miscellany |
| 6/21/25 6:34 pm |
Eddie Bartley via groups.io <eddie...> |
[SFBirds] Southern Waterfront breeding bird miscellany |
| 6/21/25 8:52 am |
Liam Murphy via groups.io <liammsf...> |
[SFBirds] Confiding MACGILLIVRAYS WARBLER at Elk Glen |
| 6/19/25 10:54 am |
Keith Maley via groups.io <keith.maley...> |
[SFBirds] Least Terns cont. - India Basin |
| |
Date: 7/17/25 11:22 am
From: Dominik Mosur via groups.io <dominikmosur...>
Subject: [SFBirds] cont. A. Redstart, breeding notes, arrivals |
This morning (7/17/25) the first summer male AMERICAN REDSTART found on
7/3 (and last reported in eBird on 7/4) continued in the willows at the
east end of Pine Lake. It's in the same area it was initially located but
is no longer singing which probably explains the lack of any recent reports.
On Sunday (7/13) I confirmed successful breeding of Olive-sided Flycatchers
at Mount Sutro OSP in the course of bi-monthly surveys of the site. Two
recently fledged juveniles were huddling together in an elderberry at the
junction of the Edgewood and Fairy Gates trails approximately 50-75m from
the Cypress tree that held the nest this year. Olive-sided Flycatchers have
nested in this spot for at least the past 4 summers and in nearby sites on
Sutro before then. This is the only site left for nesting Olive-sided
Flycatcher in San Francisco since a fledgling was found on Mount Davidson
c. 2016-17. They were once more widespread.
On a (perhaps) less encouraging note, repeated visits to the Haight-Ashbury
district this spring have resulted in confirmation of breeding White-eyes
in the area of Clayton and Waller. Last week (6+) birds were noted
including at least one somewhat obvious juvenile; visits earlier in spring
typically turned up only 1-3 birds. These are tentatively being identified
as Swinhoe's which is the species that has rapidly colonized Southern
California but I will continue to look into the ID and update the list if I
find out anything more on this.
While the bulk of fall migration is still about a month from kicking off
for passerines there are already a few birds that are starting to come
through.
7/17 - female Bullock's Oriole on Corona Hill
7/13 - male Black-headed Grosbeak, (2) House Wrens, Orange Crowned warbler
on Mount Sutro
Shorebirds on the other hand are already arriving in good numbers. On 7/11
I visited the Yosemite Slough Restoration Unit of Candlestick State
Recreation area. The exposed mudflats of the Slough held: (2) Black-bellied
Plovers, (~20) Least Sandpipers and (7) Greater Yellowlegs along with a
couple of Whimbrels and Curlews. The mudflats of the slough begin to
uncover approximately 3 hours before the peak low tide and at this time the
birds tend to be concentrated in a smaller area and more easily studied.
The most direct access is from the east end of Van Dyke Street.
Happy Summer Birding,
Dominik Mosur
San Francisco
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Date: 7/14/25 11:28 am
From: Dominik Mosur via groups.io <dominikmosur...>
Subject: [SFBirds] NAZCA Booby Alcatraz 7/14/25 |
Alcatraz Biologist Morgan Barnes just sent me photos of an adult Nazca Booby seen from the island a few minutes ago.
Dominik Mosur
San Francisco
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Date: 7/13/25 7:59 am
From: David Assmann via groups.io <david_assmann...>
Subject: [SFBirds] Northern Parula continues |
The NORTHERN PARULA found yesterday by Angie Geiger in the Fort Scott Community Garden continues today over by the sheds.
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Date: 7/12/25 1:46 pm
From: David Assmann via groups.io <david_assmann...>
Subject: [SFBirds] Local Interest - Dispersing Birds and Returning Shorebirds |
An ASH-THROATED FLYCATCHER showed up briefly behind the General's Residence at Fort Mason this morning, a sign that post-breeding dispersal is underway. On Thursday, a WESTERN TANAGER was in the garden at Fort Mason, and SAVANNAH SPARROWS have arrived at Crissy Field. Shorebirds are coming back, many still in alternative plumage (including WESTERN SANDPIPERS at Quartermaster Reach, and WILLETS at Heron's Head that sported breeding plumage). Since the beginning of the month, I've spotted 11 species on shorebirds, including SNOWY PLOVERS at Sunset Dunes Park on Friday (first reported by Rob Cullison on Thursday). A newly fledged ELEGANT TERN at Crissy Lagoon this morning confused me (its straight short bill and almost entirely white head had me speculating about other tern species).
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Date: 7/9/25 6:31 pm
From: San Mateo County Bird Alliance via groups.io <office...>
Subject: [SFBirds] Tomorrow Night's Monthly Meeting - Wildlife Photography |
Tomorrow night, July 10th, our Monthly Meeting features Wildlife Photography from Vishal Subramanyan, who will present his journey as a wildlife photographer in California, from the coast to the mountains. He'll share stories of animals big and small, from shrews to mountain lions, and how he captured these incredible photos.
Subramanyan is an award-winning wildlife photographer and a National Geographic Young Explorer! As a freelance storyteller, he partners with leading conservation organizations in California and beyond to create stories that inspire deeper connections between people and nature. He graduated from UC Berkeley in 2024 with degrees in ecology and statistics. His work has been featured by National Geographic, CNN, NPR, Smithsonian, and the LA Times, and has won prestigious awards, including Wildlife Photographer of the Year.
Join us on ZOOM at 7:00 PM. Registration: https://bit.ly/3HYIZVG
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Date: 7/3/25 7:04 am
From: Dominik Mosur via groups.io <dominikmosur...>
Subject: [SFBirds] Continuing MAGNOLIA and AMERICAN REDSTART @ Pine Lake 7/3/25 |
The Magnolia was been joined by a first summer American Redstart this morning. Both birds currently at SE Willow patch on the edge of pine lake - countersinging.
Happy Summer Birding,
Dominik Mosur
San Francisco
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Date: 7/2/25 7:02 am
From: Dominik Mosur via groups.io <dominikmosur...>
Subject: [SFBirds] Magnolia Warbler continues 7/2/25 |
Singing persistently here: 37.73638, -122.48849 but if you come looking for it don’t glue yourself to one spot as it ranges around the east end of the lake. Best way to find it is to listen for its song.
DM
SF
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Date: 6/30/25 10:02 pm
From: Aaron Maizlish via groups.io <amm.birdlists...>
Subject: Re: [SFBirds] Magnolia warbler continues |
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Date: 6/30/25 12:04 pm
From: Sally M. Walters via groups.io <bajaowl...>
Subject: Re: [SFBirds] Magnolia warbler continues |
Can you confirm gender or age?
Sally M. Walters
Sacramento
<bajaowl...>
> On Jun 30, 2025, at 11:01 AM, Nancy Palmer via groups.io <nancy_palmer...> wrote:
>
> Magnolia warbler found by Dominik yesterday continues but has moved to the north side of the lake in the Eucs. Approximately here: (37.7363972, -122.4884398).
>
> Best,
> Nancy Palmer
> SF
>
>
> Nancy Palmer Photography
> www.nancypalmer.co
> IG: @_nancypalmer
>
>
>> On Jun 30, 2025, at 7:42 AM, Brian Fitch via groups.io <fogeggs...> wrote:
>>
>> Dom’s Magnolia Warbler continues as of 7:30 this morning, singing in the southeastern willows of Pine Lake.
>> Brian Fitch
>
>
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Date: 6/30/25 11:49 am
From: Liam Murphy via groups.io <liammsf...>
Subject: [SFBirds] WHITE PELICANS at Crissy |
Paul Gallaher found 5 American White Pelicans at Crissy lagoon this
morning. 3 of the 5 are still present now at 11:48, pretty near the west
end.
Good birding,
Liam Murphy
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Date: 6/30/25 11:02 am
From: Nancy Palmer via groups.io <nancy_palmer...>
Subject: [SFBirds] Magnolia warbler continues |
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Date: 6/30/25 7:42 am
From: Brian Fitch via groups.io <fogeggs...>
Subject: [SFBirds] Magnolia |
Dom’s Magnolia Warbler continues as of 7:30 this morning, singing in the
southeastern willows of Pine Lake.
Brian Fitch
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Date: 6/29/25 10:19 am
From: Dominik Mosur via groups.io <dominikmosur...>
Subject: [SFBirds] MAGNOLIA Warbler @ Pine Lake 6/29/25 |
Singing away - currently in the alder next to the rec building at east end of lake.
Caution - there’s a concert starting at Stern Grove so the park will be loud and busy for much of the day.
Dominik Mosur
San Francisco
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Date: 6/26/25 11:48 am
From: sf_colleen via groups.io <sf_colleen...>
Subject: Re: [SFBirds] American Dipper at McClaren continuing |
It’s back about the wooden bridge. Pretty close in and very cooperative!
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Date: 6/26/25 11:04 am
From: Steve Kaye via groups.io <stevekaye...>
Subject: Re: [SFBirds] American Dipper at McClaren continuing |
Now it is down by the edge of the pond.
> On Jun 26, 2025, at 7:46 AM, Whitney Grover via groups.io <wlgrover...> wrote:
>
> Dipper continues this morning, just above the wooden bridge. (37.7215705, -122.4152248)
>
> Amazing!
>
> Whitney
>
>
>
>
>
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Date: 6/26/25 7:46 am
From: Whitney Grover via groups.io <wlgrover...>
Subject: Re: [SFBirds] American Dipper at McClaren continuing |
Dipper continues this morning, just above the wooden bridge. (37.7215705, -122.4152248)
Amazing!
Whitney
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Date: 6/26/25 7:19 am
From: Liam Murphy via groups.io <liammsf...>
Subject: [SFBirds] AMERICAN REDSTART Bernal Hill |
Morning all,
I happened upon a singing American Redstart this morning while walking near
the Bernal Hill painted boulders. Pretty skulky bird and fell silent a few
minutes ago, but could still be around.
37.743879,-122.411533
Good birding,
Liam Murphy
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Date: 6/25/25 12:17 pm
From: Nancy Palmer via groups.io <nancy_palmer...>
Subject: [SFBirds] American Dipper at McClaren continuing |
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Date: 6/25/25 7:49 am
From: C Lou via groups.io <cdlou37...>
Subject: [SFBirds] American dipper at mcnab lake in SF |
The American Dipper is in the little pools of water by the inlet stream.Has been along the boardwalk. Not shy.Calvin Lou 748amSent from my Galaxy
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Date: 6/25/25 7:35 am
From: C Lou via groups.io <cdlou37...>
Subject: Re: [SFBirds] Southern Waterfront breeding bird miscellany |
American Dipper still at McNab Lake in McLaren Park.Calvin LouSFSent from my Galaxy
-------- Original message --------From: Eddie Bartley <eddie...> Date: 6/25/25 6:35 AM (GMT-08:00) To: <SFBirds...> Subject: Re: [SFBirds] Southern Waterfront breeding bird miscellany Super cool on two Oystercatcher-lets. Thanks for sharing that happy news Liam! If the barge is indeed where they were hatched, glad it stayed in place long enough for that to happen. They can be very good at hiding despite their size.
So that's a second pair incubating on the Aqua Vista tern pier. Seems a little late in the season for that behavior. Perhaps a second try or maybe they are young parents. Noreen witnessed a nest exchange there yesterday.
Another historic nesting location for BLOY on the southern waterfront has been on Double-rock - located at the southeast yawn of Yosemite Slough. Haven't been there in months but be good to keep an eye out just in case.
Eddie
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Date: 6/25/25 6:35 am
From: Eddie Bartley via groups.io <eddie...>
Subject: Re: [SFBirds] Southern Waterfront breeding bird miscellany |
Super cool on two Oystercatcher-lets. Thanks for sharing that happy news Liam! If the barge is indeed where they were hatched, glad it stayed in place long enough for that to happen. They can be very good at hiding despite their size.
So that's a second pair incubating on the Aqua Vista tern pier. Seems a little late in the season for that behavior. Perhaps a second try or maybe they are young parents. Noreen witnessed a nest exchange there yesterday.
Another historic nesting location for BLOY on the southern waterfront has been on Double-rock - located at the southeast yawn of Yosemite Slough. Haven't been there in months but be good to keep an eye out just in case.
Eddie
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Date: 6/24/25 2:26 pm
From: Liam Murphy via groups.io <liammsf...>
Subject: Re: [SFBirds] Southern Waterfront breeding bird miscellany |
Following up from these messages with a couple updates from Heron's Head:
- LEAST TERNS were present again this afternoon, at least a couple seen
over India Basin and a few more out over the bay. Three small-ish terns
were roosted on the back side of the gravel berm, in a location where I
could only view them distantly. I think they were Forster's Terns but I
couldn't definitively rule out Least.
- I just watched as a BLACK OYSTERCATCHER flew across the water towards the
Recology building and landed on the rusted barge below with the stenciled
name WESTAR XIV. When the bird landed, two still-downy young came running
over to get a taste of whatever their parents was bringing back. So it
seems that while they may have moved off the exposed roof, the
Oystercatchers have once again succeeded in reproducing here.
Cheers,
Liam
On Sat, Jun 21, 2025, 7:39 PM Liam Murphy via groups.io <liammsf=
<gmail.com...> wrote:
> Thanks for these notes Eddie!
>
> On my way out to India Basin today, I saw 4 White-throated Swifts flying
> quite close to the elevated 280 freeway. Since I was driving and in
> traffic, I can't be sure, but the birds were flying in tight proximity, I
> did wonder if they might have been pairs or a family group in the proximity
> of a nest site somewhere in those overpasses. Definitely interesting!
>
> And by the way, 4 or more Least Terns were once again foraging in the
> India Basin around midday. It would be amazing if an area could be
> protected if these birds wanted to attempt to establish a colony on this
> side of the bay. But, as you note, the aggressive pace of redevelopment in
> that part of town makes that seem unlikely.
>
> Good birding, and hoping for more breeding birds in San Francisco!
>
> Liam
>
> On Sat, Jun 21, 2025, 6:34 PM Eddie Bartley via groups.io <eddie=
> <naturetrip.com...> wrote:
>
>> Super cool on the first SF breeding record for Blue-gray Gnatcatcher in
>> the "re-created" hollow in the Presidio, thanks for sharing that good news
>> Dom.
>>
>> Due to the general lack of open space and pittance of quality habitat on
>> the east side of SF (relative to the central ridge and west), breeding of
>> birds is much suppressed on this side of town. Also, it appears the ever
>> burgeoning Raven and Crow populations have eliminated much in the way of
>> backyard songbird breeding compared to 20 years ago. These clever corvids
>> are really good at finding nests.
>>
>> Any bird breeding activity is something to celebrate so I'm adding a few
>> seasonal observations from our Southern Waterfront area ramblings for any
>> folks interested in this sort of thing.
>>
>> *Aqua Vista Park:* About 5 years ago, at some expense and with good
>> intentions the Port of SF installed a Caspian Tern "platform" replete with
>> tern decoys and audio playback (until the solar panel powering it was
>> stolen about a year later). The idea was to replace the dilapidating pier
>> that the terns had adopted and successfully bred at for at least a decade
>> before it finally collapsed during winter storms. Unfortunately the terns
>> never took a liking to the new platform having likely lost their homing
>> mechanism in the two (or 3?) years between the old pier collapse and the
>> new platform installation. The decoys are still there, most all listing on
>> one side now. Noreen and I take a look each spring a time or three in
>> hopes (though less and less each year) that they will re-establish. So it
>> was a fun surprise on two recent visits to see a pair of *BLACK
>> OYSTERCATCHERS *take up territory on the platform. One at a time sitting
>> for long periods of time as if incubating in the exact same location
>> sheltered in part from one of the listing decoys. Quite exposed but who
>> knows, might could work. Coincidentally maybe, this is the first year that
>> we have not been able to detect Black Oystercatchers making a breeding go
>> of it at Heron's Head Park. First noticed an oyster-let there during a
>> butterfly survey about 10 years ago on the dilapidating Lashlighter Pier,
>> which completed it's collapse about four years ago. Oystercatchers then
>> took to breeding on the roof of the Recology recycling center (with many,
>> many Western Gulls) which probably made for an ever-greater exciting first
>> flight for any surviving oyster-lets. Despite those odds, most years in the
>> past ten we've usually seen a young darkish-billed juvenile Oystercatcher
>> foraging along the rip-rap at Heron's Head. Nature can be super resilient
>> that's for sure!
>>
>> *Red-winged Blackbirds, India Basin & Pier 94: *another interesting
>> breeding adaptation is the apparent move of a breeding colony of RW
>> Blackbirds from the very east end of India Basin to Pier 94. Up until the
>> early 2010's at least RWBLs nested in a patch of willows until "The
>> Shipyard" developer apparently decided those willows must go. Maybe they
>> didn't like the occasional campers. Not too long after that, and shortly
>> after the uplands portion of Pier 94 was raised with dredged materials and
>> planted with some natives, a few RW Blackbirds began attempting to nest in
>> the Coyote Brush and Toyon there. We've seen young over the past few years
>> but never as many as this year. Per our eBird reports: seems a few (and
>> only) males show up beginning early December, then more and more males
>> until some females join them about March or April when courtship and
>> nesting is taken on in earnest. We've been out much of June so haven't
>> visited this month but my highest estimate yet was at least 32 individuals
>> with at least 8 young on May 26. Probably many more since, to keep
>> disturbance to a minimum, we tally moving quickly dodging perched alarming
>> males.
>>
>> *White-throated Swifts: *speculative at this point but this past month
>> we have seen several WTSW from the elevated section of I-280 between Caesar
>> Chavez & the 101 split. Could be that they are nesting in the weep-holes on
>> the under-beneath of the freeway - a well documented breeding adaptation of
>> these aviation specialist.
>>
>> Wishing you many happy discoveries!
>>
>> Eddie Bartley
>>
>
>
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Date: 6/22/25 10:19 pm
From: gene_ggaschat via groups.io <gene_ggaschat...>
Subject: Re: [SFBirds] Southern Waterfront breeding bird miscellany |
>
> *Aqua Vista Park:* About 5 years ago, at some expense and with good
> intentions the Port of SF installed a Caspian Tern "platform" replete with
> tern decoys and audio playback (until the solar panel powering it was
> stolen about a year later). The idea was to replace the dilapidating pier
> that the terns had adopted and successfully bred at for at least a decade
> before it finally collapsed during winter storms. Unfortunately the terns
> never took a liking to the new platform having likely lost their homing
> mechanism in the two (or 3?) years between the old pier collapse and the
> new platform installation. The decoys are still there, most all listing on
> one side now.
>
>
This is very interesting! We walk by aqua vista park almost daily and I have two comments:
1. We saw scores if not a hundred terns on the platform this winter. That doesn’t seem to square with your comments about the terns abandoning the area.
2. After the terns were gone, we still noticed tern-looking shapes on the platform, so one day we finally remembered to bring our binoculars and it seemed like a dozen or so dead terns on the platform. It made us sad. I wondered if they had been struck by bird flu or something. So, I was very heartened to read your comment and learn that they were only decoys!
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Date: 6/22/25 11:26 am
From: Bob Hall via groups.io <bilgepump100...>
Subject: Re: [SFBirds] Southern Waterfront breeding bird miscellany |
Liam repeated, "But, as you note, the aggressive pace of redevelopment in that part of town makes that seem unlikely.”
Yes, unlikely but not impossible. However, SF Rec/Park doesn’t employ a biologist of ecologist so, unfortunately, it’s up to us to let them know what’s going on with wildlife in the city. City managers have a lot of interest groups making requests (dog walkers, pickballers) so WE have to become vocal and not assume that the city knows things that seem obvious to us.
I’m asking that you please send an email to the SF Rec/Park Commission, the Indian Basin project manager, Lauren Dietrich Chavez by email at <lauren.chavez...> (she’s kind of on our side on most issues) and the district Supervisor Walton.
Also in the realm of conservation, state listed Tricolored blackbirds have been seen by Dom at Crocker Amazon Park. I hate lawns but the giant lawn actually is a magnate for blackbirds, flickers, herons, swallows, etc. and is much better for birds than the addition 15 acres of plastic playing fields Rec/Park is proposing.
If someone can survey the park and keep the eBrid list current while we fight the conversion to plastic, please do so. The irrigated, mature trees there are also scheduled for demolition. It’s probably getting late in the season to look for nesting evidence.
If you want to comment on the Crocker Amazon situation, please go to KeepCrockerReal.com
Thanks,
Bob Hall
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Date: 6/21/25 7:39 pm
From: Liam Murphy via groups.io <liammsf...>
Subject: Re: [SFBirds] Southern Waterfront breeding bird miscellany |
Thanks for these notes Eddie!
On my way out to India Basin today, I saw 4 White-throated Swifts flying
quite close to the elevated 280 freeway. Since I was driving and in
traffic, I can't be sure, but the birds were flying in tight proximity, I
did wonder if they might have been pairs or a family group in the proximity
of a nest site somewhere in those overpasses. Definitely interesting!
And by the way, 4 or more Least Terns were once again foraging in the India
Basin around midday. It would be amazing if an area could be protected if
these birds wanted to attempt to establish a colony on this side of the
bay. But, as you note, the aggressive pace of redevelopment in that part of
town makes that seem unlikely.
Good birding, and hoping for more breeding birds in San Francisco!
Liam
On Sat, Jun 21, 2025, 6:34 PM Eddie Bartley via groups.io <eddie=
<naturetrip.com...> wrote:
> Super cool on the first SF breeding record for Blue-gray Gnatcatcher in
> the "re-created" hollow in the Presidio, thanks for sharing that good news
> Dom.
>
> Due to the general lack of open space and pittance of quality habitat on
> the east side of SF (relative to the central ridge and west), breeding of
> birds is much suppressed on this side of town. Also, it appears the ever
> burgeoning Raven and Crow populations have eliminated much in the way of
> backyard songbird breeding compared to 20 years ago. These clever corvids
> are really good at finding nests.
>
> Any bird breeding activity is something to celebrate so I'm adding a few
> seasonal observations from our Southern Waterfront area ramblings for any
> folks interested in this sort of thing.
>
> *Aqua Vista Park:* About 5 years ago, at some expense and with good
> intentions the Port of SF installed a Caspian Tern "platform" replete with
> tern decoys and audio playback (until the solar panel powering it was
> stolen about a year later). The idea was to replace the dilapidating pier
> that the terns had adopted and successfully bred at for at least a decade
> before it finally collapsed during winter storms. Unfortunately the terns
> never took a liking to the new platform having likely lost their homing
> mechanism in the two (or 3?) years between the old pier collapse and the
> new platform installation. The decoys are still there, most all listing on
> one side now. Noreen and I take a look each spring a time or three in
> hopes (though less and less each year) that they will re-establish. So it
> was a fun surprise on two recent visits to see a pair of *BLACK
> OYSTERCATCHERS *take up territory on the platform. One at a time sitting
> for long periods of time as if incubating in the exact same location
> sheltered in part from one of the listing decoys. Quite exposed but who
> knows, might could work. Coincidentally maybe, this is the first year that
> we have not been able to detect Black Oystercatchers making a breeding go
> of it at Heron's Head Park. First noticed an oyster-let there during a
> butterfly survey about 10 years ago on the dilapidating Lashlighter Pier,
> which completed it's collapse about four years ago. Oystercatchers then
> took to breeding on the roof of the Recology recycling center (with many,
> many Western Gulls) which probably made for an ever-greater exciting first
> flight for any surviving oyster-lets. Despite those odds, most years in the
> past ten we've usually seen a young darkish-billed juvenile Oystercatcher
> foraging along the rip-rap at Heron's Head. Nature can be super resilient
> that's for sure!
>
> *Red-winged Blackbirds, India Basin & Pier 94: *another interesting
> breeding adaptation is the apparent move of a breeding colony of RW
> Blackbirds from the very east end of India Basin to Pier 94. Up until the
> early 2010's at least RWBLs nested in a patch of willows until "The
> Shipyard" developer apparently decided those willows must go. Maybe they
> didn't like the occasional campers. Not too long after that, and shortly
> after the uplands portion of Pier 94 was raised with dredged materials and
> planted with some natives, a few RW Blackbirds began attempting to nest in
> the Coyote Brush and Toyon there. We've seen young over the past few years
> but never as many as this year. Per our eBird reports: seems a few (and
> only) males show up beginning early December, then more and more males
> until some females join them about March or April when courtship and
> nesting is taken on in earnest. We've been out much of June so haven't
> visited this month but my highest estimate yet was at least 32 individuals
> with at least 8 young on May 26. Probably many more since, to keep
> disturbance to a minimum, we tally moving quickly dodging perched alarming
> males.
>
> *White-throated Swifts: *speculative at this point but this past month we
> have seen several WTSW from the elevated section of I-280 between Caesar
> Chavez & the 101 split. Could be that they are nesting in the weep-holes on
> the under-beneath of the freeway - a well documented breeding adaptation of
> these aviation specialist.
>
> Wishing you many happy discoveries!
>
> Eddie Bartley
>
>
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Date: 6/21/25 6:34 pm
From: Eddie Bartley via groups.io <eddie...>
Subject: [SFBirds] Southern Waterfront breeding bird miscellany |
Super cool on the first SF breeding record for Blue-gray Gnatcatcher in the "re-created" hollow in the Presidio, thanks for sharing that good news Dom.
Due to the general lack of open space and pittance of quality habitat on the east side of SF (relative to the central ridge and west), breeding of birds is much suppressed on this side of town. Also, it appears the ever burgeoning Raven and Crow populations have eliminated much in the way of backyard songbird breeding compared to 20 years ago. These clever corvids are really good at finding nests.
Any bird breeding activity is something to celebrate so I'm adding a few seasonal observations from our Southern Waterfront area ramblings for any folks interested in this sort of thing.
*Aqua Vista Park:* About 5 years ago, at some expense and with good intentions the Port of SF installed a Caspian Tern "platform" replete with tern decoys and audio playback (until the solar panel powering it was stolen about a year later). The idea was to replace the dilapidating pier that the terns had adopted and successfully bred at for at least a decade before it finally collapsed during winter storms. Unfortunately the terns never took a liking to the new platform having likely lost their homing mechanism in the two (or 3?) years between the old pier collapse and the new platform installation. The decoys are still there, most all listing on one side now. Noreen and I take a look each spring a time or three in hopes (though less and less each year) that they will re-establish. So it was a fun surprise on two recent visits to see a pair of *BLACK OYSTERCATCHERS* take up territory on the platform. One at a time sitting for long periods of time as if incubating in the exact same location sheltered in part from one of the listing decoys. Quite exposed but who knows, might could work. Coincidentally maybe, this is the first year that we have not been able to detect Black Oystercatchers making a breeding go of it at Heron's Head Park. First noticed an oyster-let there during a butterfly survey about 10 years ago on the dilapidating Lashlighter Pier, which completed it's collapse about four years ago. Oystercatchers then took to breeding on the roof of the Recology recycling center (with many, many Western Gulls) which probably made for an ever-greater exciting first flight for any surviving oyster-lets. Despite those odds, most years in the past ten we've usually seen a young darkish-billed juvenile Oystercatcher foraging along the rip-rap at Heron's Head. Nature can be super resilient that's for sure!
*Red-winged Blackbirds, India Basin & Pier 94:* another interesting breeding adaptation is the apparent move of a breeding colony of RW Blackbirds from the very east end of India Basin to Pier 94. Up until the early 2010's at least RWBLs nested in a patch of willows until "The Shipyard" developer apparently decided those willows must go. Maybe they didn't like the occasional campers. Not too long after that, and shortly after the uplands portion of Pier 94 was raised with dredged materials and planted with some natives, a few RW Blackbirds began attempting to nest in the Coyote Brush and Toyon there. We've seen young over the past few years but never as many as this year. Per our eBird reports: seems a few (and only) males show up beginning early December, then more and more males until some females join them about March or April when courtship and nesting is taken on in earnest. We've been out much of June so haven't visited this month but my highest estimate yet was at least 32 individuals with at least 8 young on May 26. Probably many more since, to keep disturbance to a minimum, we tally moving quickly dodging perched alarming males.
*White-throated Swifts:* speculative at this point but this past month we have seen several WTSW from the elevated section of I-280 between Caesar Chavez & the 101 split. Could be that they are nesting in the weep-holes on the under-beneath of the freeway - a well documented breeding adaptation of these aviation specialist.
Wishing you many happy discoveries!
Eddie Bartley
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Date: 6/21/25 8:52 am
From: Liam Murphy via groups.io <liammsf...>
Subject: [SFBirds] Confiding MACGILLIVRAYS WARBLER at Elk Glen |
Singing male, west end of lake, here:
37.767443,-122.482723
Frequently singing from exposed or high perch
Good birding,
Liam Murphy
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Date: 6/19/25 10:54 am
From: Keith Maley via groups.io <keith.maley...>
Subject: [SFBirds] Least Terns cont. - India Basin |
At least 6 foraging here: (37.7343444, -122.3745461) Great close-up views and photo opps- best I’ve had in SF.
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