Date   

Bobolink at Crissy Field Meadow

Adam Winer
 

With meadowlarks. Also 4 Greater White-fronted Geese.


Lark and Clay-Colored Sparrows at Fort Mason

David Assmann
 

There were 10 species of sparrow at Fort Mason this morning, including a LARK and a CLAY-COLORED SPARROW. A LINCOLN'S SPARROW, a WHITE-THROATED SPARROW, and 6 SAVANNAH SPARROWS were the other interesting sparrows.  Many GOLDEN-CROWNED SPARROWS were singing.


Re: Crissy this AM- Sept 30 ; CC Sparrow; Brewers Sparrow ,Teal, WT Kite

H Cotter
 

All,
There is some differing opinion on the Brewers sparrow I reported earlier and may be a well marked CC Sparrow.
I am looking into it but will retract Brewers for now,

Hugh


On Thu, Sep 30, 2021 at 12:54 PM H Cotter via groups.io <chatwren=gmail.com@groups.io> wrote:
There was a Brewer's Sparrow, Clay-colored Sparrow, WT Kite , White Pelican and the continuing teal at Crissy this morning.

Clay colored was along the main path at the west end; Brewer's was in the main field in the middle, north ( almost in line with Fort Point Brewery).
The Pintail, GW Teal and BW type Teal was also towards the west end but not close enough to look at properly.

Hugh






Bernal Hill

Donna Hayes
 

This morning I had repeated sightings of an acorn woodpecker on Bernal Hill. It seemed to be circling the hill, as I saw it on both the northern and southern sides. Last seen flying south.

I also saw my FOS Townsend’s warbler. Maybe I’m late to the game.

A few people told us about crows mobbing a red-tail hawk at the top of the hill. I didn’t see this myself, although did observe 20+ crows above the hill. One person told us the hawk had a damaged wing. Anyone know anything about this? Later,I did see two adult red tails circling above the north side.

Also observed: 3 dark-eyed juncos, several pygmy nuthatches, singing white crown sparrows, 2 black phoebes that seemed to be having a confrontation.

Interesting birding!
Donna Hayes


Crissy this AM- Sept 30 ; CC Sparrow; Brewers Sparrow ,Teal, WT Kite

H Cotter
 

There was a Brewer's Sparrow, Clay-colored Sparrow, WT Kite , White Pelican and the continuing teal at Crissy this morning.

Clay colored was along the main path at the west end; Brewer's was in the main field in the middle, north ( almost in line with Fort Point Brewery).
The Pintail, GW Teal and BW type Teal was also towards the west end but not close enough to look at properly.

Hugh






Crissy this evening - Sept 29th ; Teal

H Cotter
 

I stopped at Crissy late this evening - 6.45 pm.
On the lagoon was a single White Pelican.
At the west end was a single Pintail, GW Teal and a potential BW Teal. It was getting dark but this bird appeared to show a pale spot at the base of the bill and the bill seemed to be ok for BW teal.
Will need to check it out again tomorrow to confirm.

Hugh


Another Prairie Warbler

David Armstrong
 

Looking at it now, Presidio Hills. Favoring the coyote bush just east of the brick building here:

https://maps.app.goo.gl/isXY8Nnc1kdhLGiR6

2 Acorn Woodpeckers up the hill in a dead pine as well.

Also early this morning I had a Tennessee Warbler with other warblers at Golden Gate Heights Park. Also an RB Sapsucker in this location. Sorry for the delayed report.

David


Another palm warbler SW end of Fort Scott field

Rachel Lawrence
 



Another Northern Parula

Rachel Lawrence
 

I can’t remember if this has been reported a few days ago but it’s in Dragonfly creek, flew from north slope bushes into alders


Re: Hybrid White-crowned x White-throated Sparrow?

Alvaro Jaramillo
 

Joe
Bad use of language. Tree line Taiga is what I should have said, too
shrubby for Tundra and certainly not forest. I don't know if they take
muskeg, openings in the Black Spruce swamps, but they may do. But I think of
them as dry shrubby tree line vegetation, tree line due to latitude or
altitude.
Alvaro

Alvaro Jaramillo
alvaro@...
www.alvarosadventures.com

-----Original Message-----
From: SFBirds@groups.io <SFBirds@groups.io> On Behalf Of Joe Morlan
Sent: Wednesday, September 29, 2021 8:51 AM
To: Alvaro Jaramillo <chucao@...>
Cc: 'Adam Winer' <awiner@...>; 'SF Birds' <sfbirds@groups.io>
Subject: Re: [SFBirds] Hybrid White-crowned x White-throated Sparrow?

On Tue, 28 Sep 2021 23:30:36 -0700, "Alvaro Jaramillo"
<chucao@...> wrote:

White-throated being a forest bird, and White-crowned being a Taiga bird
might be why that hybrid combo is so rare or unrecorded.

Not sure what you mean by this. Isn't Taiga is the same thing as boreal
forest?
--
Joseph Morlan, Pacifica, CA


Re: Hybrid White-crowned x White-throated Sparrow?

Joe Morlan
 

On Tue, 28 Sep 2021 23:30:36 -0700, "Alvaro Jaramillo"
<chucao@...> wrote:

White-throated being a forest bird, and White-crowned being a Taiga bird might be why that hybrid combo is so rare or unrecorded.
Not sure what you mean by this. Isn't Taiga is the same thing as boreal
forest?
--
Joseph Morlan, Pacifica, CA


Re: Hybrid White-crowned x White-throated Sparrow?

Alvaro Jaramillo
 

Adam

    I hope it hangs around and molts for you. Part of the evaluation of what features to categorize as important might be age dependent. If you can age it as an adult, vs a youngster, that would be key. White-crowned is not individually variable, just age variation really (restricting to gambelli). Golden-crowned is complex with lots of individual and age related variation during the non-breeding season. White-throated is a true weirdo with age, and then a plumage dichotomy as adults. So how those genes mix and match is one thing, and the age will matter as well in how some of the features are expressed. Good fun.

   White-throated being a forest bird, and White-crowned being a Taiga bird might be why that hybrid combo is so rare or unrecorded. Golden-crowned takes shrubby habitats closer to forest, and certainly more humid/mesic than White-crowned on average. Although Goldens and White-crowns overlap widely in Alaska and BC. I cannot explain how Goldens come into contact with White-throats, but this does seem more likely than White-crowns and White-throats.

   BTW, once heard a White-crown in Alaska singing a perfect Golden-crowned song.

Birds are weird, that is why we like them.

Alvaro

 

Alvaro Jaramillo

alvaro@...

www.alvarosadventures.com

 

From: SFBirds@groups.io <SFBirds@groups.io> On Behalf Of Adam Winer
Sent: Tuesday, September 28, 2021 10:37 PM
To: Alvaro Jaramillo <chucao@...>
Cc: SF Birds <sfbirds@groups.io>
Subject: Re: [SFBirds] Hybrid White-crowned x White-throated Sparrow?

 

Alvaro,

 

Thanks for the feedback!  And, yeah, gambeli x Golden-crowned was where I started (and may be where I end).  If nothing else, a few Golden-crowned had just arrived that morning, making it pretty easy to imagine a Golden-crowned hybrid showing up with the same crowd.  It's also a better attested hybrid combo (though there aren't any eBird reports in SF of that combo either). And birdsoftheworld's species accounts make it sound like there's no firm evidence of any White-crowned x White-throated Sparrow hybrid ever having occurred!

 

What I'll say is that this bird phenotypically matches the things that have previously been called White-crowned x White-throated, and doesn't (to my eye) match the things that have been called White-crowned x Golden-crowned.  Specifically, sorting through Macaulay:

 

 

... the "WCSPxWTSP" (in the sense of what people have reported as such, not any absolute statement that they are such):

 

- Show no golden tones to the crown, whereas all "WCSPxGCSP" do (unsurprisingly! the gold in the crown is probably the first clue that they were looking at a hybrid with GCSP)

- Have very short and thin postocular stripes, whereas most (but not all) of the "WCSPxGCSP" show postocular stripes that connect to black at the back of the neck

- Have fairly thin crown stripes, especially towards the front, with the central white crown stripe coming all the way to the bill, whereas most (but not all) of the "WCSPxGCSP" have fairly broad crown stripes especially towards the bill, with black meeting over the bill.

 

(I'm not personally noticing any particularly consistent differences between the two buckets in bill or back coloring, though there's clearly variation on both counts.)

 

I think that the bird in my yard matches each of those characteristics. That doesn't mean, of course, that it *is* a WCSP x WTSP. I may be overvaluing facial pattern, for one;  and also how do I know that some of the claimed WCSP x WTSPs aren't actually WCSP x GCSP? (or, ugh, an F2 backcross - we've already established that backcrosses find their way to my yard!)

 

At any rate, definitely an interesting bird, and it's fun to try to puzzle this through.

 

Cheers,

Adam

 

On Tue, Sep 28, 2021 at 7:21 PM Alvaro Jaramillo <chucao@...> wrote:

Adam

   Amazing looking bird! Hey, if you had sent me this sight unseen with locality/date my thought would have been to call it a Golden-crowned x White-crowned hybrid. The reasons include the overall tone of color above, the noticeable gray wash on breast, the strongly marked crown stripes, long primary projection, and the pink tone to the bill. All suggest a Golden x gambelli White-crowned to me.

Alvaro

 

Alvaro Jaramillo

alvaro@...

www.alvarosadventures.com

 

From: SFBirds@groups.io <SFBirds@groups.io> On Behalf Of Adam Winer
Sent: Tuesday, September 28, 2021 5:52 PM
To: SF Birds <sfbirds@groups.io>
Subject: [SFBirds] Hybrid White-crowned x White-throated Sparrow?

 

Yesterday morning, along with an influx of Golden-crowned Sparrows, I had an odd Zonotrichia in my yard that I'm fairly confident is a hybrid White-crowned x White-throated Sparrow - or, at least, I'm fairly confident is a match for birds others have called that hybrid combo.

 

It's not a very commonly observed hybrid (this would be the first eBird record for San Francisco!), but there are a number of photos from around California and outside, which this bird matches well. (Macaulay Library has quite a few such photos.)

 

Salient features, at least by my eye:

 

- A short and thin black postocular stripe

- Thin crown stripes, with the impression of a pale blob in the lores where a White-throated might have a yellow spot

- A poorly differentiated, but definitely present pale throat and white submoustachial

- A largely pink bill, unlike either the yellow or orange of typical White-crowned ssps for this area

- A rather tan color to the supercilium, neither gray nor white

- Faint streaking on the underparts

 

Neat bird!  But I haven't seen it since.

 

Cheers,

Adam Winer

 

 


Re: Hybrid White-crowned x White-throated Sparrow?

Adam Winer
 

Alvaro,

Thanks for the feedback!  And, yeah, gambeli x Golden-crowned was where I started (and may be where I end).  If nothing else, a few Golden-crowned had just arrived that morning, making it pretty easy to imagine a Golden-crowned hybrid showing up with the same crowd.  It's also a better attested hybrid combo (though there aren't any eBird reports in SF of that combo either). And birdsoftheworld's species accounts make it sound like there's no firm evidence of any White-crowned x White-throated Sparrow hybrid ever having occurred!

What I'll say is that this bird phenotypically matches the things that have previously been called White-crowned x White-throated, and doesn't (to my eye) match the things that have been called White-crowned x Golden-crowned.  Specifically, sorting through Macaulay:


... the "WCSPxWTSP" (in the sense of what people have reported as such, not any absolute statement that they are such):

- Show no golden tones to the crown, whereas all "WCSPxGCSP" do (unsurprisingly! the gold in the crown is probably the first clue that they were looking at a hybrid with GCSP)
- Have very short and thin postocular stripes, whereas most (but not all) of the "WCSPxGCSP" show postocular stripes that connect to black at the back of the neck
- Have fairly thin crown stripes, especially towards the front, with the central white crown stripe coming all the way to the bill, whereas most (but not all) of the "WCSPxGCSP" have fairly broad crown stripes especially towards the bill, with black meeting over the bill.

(I'm not personally noticing any particularly consistent differences between the two buckets in bill or back coloring, though there's clearly variation on both counts.)

I think that the bird in my yard matches each of those characteristics. That doesn't mean, of course, that it *is* a WCSP x WTSP. I may be overvaluing facial pattern, for one;  and also how do I know that some of the claimed WCSP x WTSPs aren't actually WCSP x GCSP? (or, ugh, an F2 backcross - we've already established that backcrosses find their way to my yard!)

At any rate, definitely an interesting bird, and it's fun to try to puzzle this through.

Cheers,
Adam

On Tue, Sep 28, 2021 at 7:21 PM Alvaro Jaramillo <chucao@...> wrote:

Adam

   Amazing looking bird! Hey, if you had sent me this sight unseen with locality/date my thought would have been to call it a Golden-crowned x White-crowned hybrid. The reasons include the overall tone of color above, the noticeable gray wash on breast, the strongly marked crown stripes, long primary projection, and the pink tone to the bill. All suggest a Golden x gambelli White-crowned to me.

Alvaro

 

Alvaro Jaramillo

alvaro@...

www.alvarosadventures.com

 

From: SFBirds@groups.io <SFBirds@groups.io> On Behalf Of Adam Winer
Sent: Tuesday, September 28, 2021 5:52 PM
To: SF Birds <sfbirds@groups.io>
Subject: [SFBirds] Hybrid White-crowned x White-throated Sparrow?

 

Yesterday morning, along with an influx of Golden-crowned Sparrows, I had an odd Zonotrichia in my yard that I'm fairly confident is a hybrid White-crowned x White-throated Sparrow - or, at least, I'm fairly confident is a match for birds others have called that hybrid combo.

 

It's not a very commonly observed hybrid (this would be the first eBird record for San Francisco!), but there are a number of photos from around California and outside, which this bird matches well. (Macaulay Library has quite a few such photos.)

 

Salient features, at least by my eye:

 

- A short and thin black postocular stripe

- Thin crown stripes, with the impression of a pale blob in the lores where a White-throated might have a yellow spot

- A poorly differentiated, but definitely present pale throat and white submoustachial

- A largely pink bill, unlike either the yellow or orange of typical White-crowned ssps for this area

- A rather tan color to the supercilium, neither gray nor white

- Faint streaking on the underparts

 

Neat bird!  But I haven't seen it since.

 

Cheers,

Adam Winer

 

 


Re: Hybrid White-crowned x White-throated Sparrow?

Alvaro Jaramillo
 

Adam

   Amazing looking bird! Hey, if you had sent me this sight unseen with locality/date my thought would have been to call it a Golden-crowned x White-crowned hybrid. The reasons include the overall tone of color above, the noticeable gray wash on breast, the strongly marked crown stripes, long primary projection, and the pink tone to the bill. All suggest a Golden x gambelli White-crowned to me.

Alvaro

 

Alvaro Jaramillo

alvaro@...

www.alvarosadventures.com

 

From: SFBirds@groups.io <SFBirds@groups.io> On Behalf Of Adam Winer
Sent: Tuesday, September 28, 2021 5:52 PM
To: SF Birds <sfbirds@groups.io>
Subject: [SFBirds] Hybrid White-crowned x White-throated Sparrow?

 

Yesterday morning, along with an influx of Golden-crowned Sparrows, I had an odd Zonotrichia in my yard that I'm fairly confident is a hybrid White-crowned x White-throated Sparrow - or, at least, I'm fairly confident is a match for birds others have called that hybrid combo.

 

It's not a very commonly observed hybrid (this would be the first eBird record for San Francisco!), but there are a number of photos from around California and outside, which this bird matches well. (Macaulay Library has quite a few such photos.)

 

Salient features, at least by my eye:

 

- A short and thin black postocular stripe

- Thin crown stripes, with the impression of a pale blob in the lores where a White-throated might have a yellow spot

- A poorly differentiated, but definitely present pale throat and white submoustachial

- A largely pink bill, unlike either the yellow or orange of typical White-crowned ssps for this area

- A rather tan color to the supercilium, neither gray nor white

- Faint streaking on the underparts

 

Neat bird!  But I haven't seen it since.

 

Cheers,

Adam Winer

 

 


Hybrid White-crowned x White-throated Sparrow?

Adam Winer
 

Yesterday morning, along with an influx of Golden-crowned Sparrows, I had an odd Zonotrichia in my yard that I'm fairly confident is a hybrid White-crowned x White-throated Sparrow - or, at least, I'm fairly confident is a match for birds others have called that hybrid combo.

It's not a very commonly observed hybrid (this would be the first eBird record for San Francisco!), but there are a number of photos from around California and outside, which this bird matches well. (Macaulay Library has quite a few such photos.)

Salient features, at least by my eye:

- A short and thin black postocular stripe
- Thin crown stripes, with the impression of a pale blob in the lores where a White-throated might have a yellow spot
- A poorly differentiated, but definitely present pale throat and white submoustachial
- A largely pink bill, unlike either the yellow or orange of typical White-crowned ssps for this area
- A rather tan color to the supercilium, neither gray nor white
- Faint streaking on the underparts

Neat bird!  But I haven't seen it since.

Cheers,
Adam Winer


P9270072_Export.jpg
P9270070_Export.jpg
P9270051_Export.jpg


Vesper Sparrow in Bison Paddock

Nina Bai
 

Visible now from fence here (37.7691558, -122.4981745)



--
Nina Bai
San Francisco


Purple Martin

David Assmann
 

Flew over Fort Mason heading south 


Re: Lark Sparrow at Fort Mason

Keith Maley
 

Lark Sparrow continues in a small sparrow flock foraging around the 101 building this afternoon- 3:00 pm. 


On Sep 27, 2021, at 10:42 AM, David Assmann via groups.io <david_assmann@...> wrote:

West of the garden


Re: Clay-colored Sparrow

Stephen Schulz
 

Sorry about my brevity.  It was just east of the Murphy windmill in GGP, presumably the same bird as reported yesterday.

Steve Schulz
Mobile: 415 608-0160

On Monday, September 27, 2021, 01:33:53 PM PDT, Dario Taraborelli <dario.taraborelli@...> wrote:





Thanks Steve, what's the brick house?

On Mon, Sep 27, 2021 at 1:18 PM Stephen Schulz via groups.io <steveschulz1@...> wrote:
Seen with flock of mostly white crowns on bark path about 15 m east of the brick house at about 1:00 p.m.




--
Steve Schulz
San Francisco





--
Steve Schulz
San Francisco


Re: Clay-colored Sparrow

Dario Taraborelli
 

Thanks Steve, what's the brick house?


On Mon, Sep 27, 2021 at 1:18 PM Stephen Schulz via groups.io <steveschulz1=yahoo.com@groups.io> wrote:
Seen with flock of mostly white crowns on bark path about 15 m east of the brick house at about 1:00 p.m.


--
Steve Schulz
San Francisco

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