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Black-throated Blue refound
Nina Bai
In same Japanese maple over hanging Moon Viewing Garden. Being seen now high up in tree
(37.7679552, -122.4718533)
-- Nina Bai San Francisco
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Black-throated Blue Warbler at Botanic Garden
Nina Bai
About 30 min ago I had brief but good looks at a Black-throated Blue Warbler in the maple at the Moon Viewing Garden (37.7678855, -122.4716971) before it flew across the path. Trying to relocate if anyone wants to come try their luck.
-- Nina Bai San Francisco
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Tropical Kingbird at Fort Mason
Sitting on wire west of Battery
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Lewis’s at Fort Mason
Just flew over eucalyptuses northwest of garden
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Lewis’s woodpecker
Rachel Lawrence
2 in trees east of Batt Godfrey
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Re: Bobolink at Crissy Field Meadow
Adam Winer
FYI, since there were some "nice find, Adam" messages going across - the bird was first found and identified by Brian Fitch; I found and identified it independently a bit later, but he was definitely on the bird first!
On Fri, Oct 1, 2021 at 7:17 AM Adam Winer <awiner@...> wrote:
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Re: Bobolink at Crissy Field Meadow
C Lou
The bobolink continues at east end of Crissy Field. Usually near meadowlark flock. Calvin Lou SF Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message -------- From: Brian Fitch <fogeggs@...> Date: 10/1/21 8:14 AM (GMT-08:00) To: Cc: SF Birds <sfbirds@groups.io> Subject: Re: [SFBirds] Bobolink at Crissy Field Meadow The Bobolink is one of the palest I’ve seen, and when I spotted it, it was among several Savannahs at the NE corner of the field. It then flew over to the meadowlark flock where Adam was able to get photos. The meadowlarks dispersed shortly after, and I didn’t see the Bobolink again. One clay- colored type is still in yesterday’s location. Brian Fitch
On Fri, Oct 1, 2021 at 7:17 AM Adam Winer <awiner@...> wrote:
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Re: Bobolink at Crissy Field Meadow
Brian Fitch
The Bobolink is one of the palest I’ve seen, and when I spotted it, it was among several Savannahs at the NE corner of the field. It then flew over to the meadowlark flock where Adam was able to get photos. The meadowlarks dispersed shortly after, and I didn’t see the Bobolink again. One clay- colored type is still in yesterday’s location. Brian Fitch
On Fri, Oct 1, 2021 at 7:17 AM Adam Winer <awiner@...> wrote:
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Bobolink at Crissy Field Meadow
Adam Winer
With meadowlarks. Also 4 Greater White-fronted Geese.
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Lark and Clay-Colored Sparrows at Fort Mason
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.
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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
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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
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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
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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
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Another Prairie Warbler
David Armstrong
Looking at it now, Presidio Hills. Favoring the coyote bush just east of the brick building here:
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Another palm warbler SW end of Fort Scott field
Rachel Lawrence
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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
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Re: Hybrid White-crowned x White-throated Sparrow?
Alvaro Jaramillo
Joe
toggle quoted messageShow quoted text
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 birdmight 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
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Re: 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
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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 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:
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