Date   
SANDWICH TERN continues at Hayward Shoreline

Bob Toleno
 

Currently giving distant but diagnostic views from the Least Tern sign for
Juli Chamberlin, Jerry Ting, Bob Dunn, and me. It's preening on the front
of the island in the northeast part of the main tern pond. Black legs, long
black bill with a pale yellow tip. North American lifer for Juli and me!

Bob Toleno
Hayward

Re: SANDWICH TERN continues at Hayward Shoreline

Bob Toleno
 

The bird just left the island and flew past us toward the bay, presumably
to feed. Good luck to anyone who tries! We also saw a Laughing Gull in
transitional plumage on the tern pond, probably the same individual that
has been seen the past three years around this time.

Bob Toleno
Hayward

On Sun, Jun 16, 2019 at 10:31 AM Bob Toleno <@birdnerdbob> wrote:

Currently giving distant but diagnostic views from the Least Tern sign for
Juli Chamberlin, Jerry Ting, Bob Dunn, and me. It's preening on the front
of the island in the northeast part of the main tern pond. Black legs, long
black bill with a pale yellow tip. North American lifer for Juli and me!

Bob Toleno
Hayward

Sandwich Tern (6/16/2019) - photos

Jerry Ting
 

As Bob Toleno stated in his previous posts, the Sandwich Tern reported by Bob Richmond and John Luther continued to be seen in the tern colony pond in Hayward Marsh that can be seen (using a scope) from the Least Tern sign and spent most of the time preening on the south side of the island (37.630029, -122.144366) on northeast of the Least Tern island. I have included 2 distant shots of the bird in my eBird report in which you can see the yellowish tip on the dark bill and dark legs.

https://ebird.org/view/checklist/S57431258

Happy Birding,
Jerry Ting
Fremont

Re: Sandwich Tern (6/16/2019) - photos

John Sterling
 

I received a text message from an expert who I totally trust who saw the bird and determined that it was a hybrid. I’ll let him comment but just wanted to get the word out. Several records in recent years in California have proven to be hybrids. I’m in China so I haven’t seen the bird.
John Sterling
530 908-3836
26 Palm Ave
Woodland, CA 95695

On Jun 17, 2019, at 10:26 AM, Jerry Ting via Groups.Io <jtnikon=yahoo.com@groups.io> wrote:

As Bob Toleno stated in his previous posts, the Sandwich Tern reported by Bob Richmond and John Luther continued to be seen in the tern colony pond in Hayward Marsh that can be seen (using a scope) from the Least Tern sign and spent most of the time preening on the south side of the island (37.630029, -122.144366) on northeast of the Least Tern island. I have included 2 distant shots of the bird in my eBird report in which you can see the yellowish tip on the dark bill and dark legs.

https://ebird.org/view/checklist/S57431258

Happy Birding,
Jerry Ting
Fremont



Re: [CALBIRDS] [EBB-Sightings] Sandwich Tern (6/16/2019) - photos

Alvaro Jaramillo
 

John
Before the hybrid hypothesis catches too much fire. I am convinced that these birds are dark billed Elegants. Dark on the bill in Elegant Terns is common, the rarity in these cases is the extent. They can be nearly all black, like this one I saw in 2013 here in Half Moon Bay:

https://www.flickr.com/photos/alvarojaramillo/9442203562/in/photolist-XsSNif-wSAYus-wnvJR7-fCuq4m-fo8utM-fonLa9-fdmzyT-fdmziP-fdmzr8-dUozc2-d75zfy-d75yGs-d75BBs-cRqARh-agA1zx-9VJghg

The hybrids that have been identified on Isla Rasa, Baja California to my eye are again just Elegants with dark on the bill. There are color photos in the paper:
http://www.marineornithology.org/PDF/40_1/40_1_25-29.pdf
They spot various birds with dark on the bill, and assume they are all backcrosses from some original hybridization some time back. But they did not see any Sandwich (Cabot's) Tern while they performed their study. Again, I do not think they were considering that these were merely a variation in Elegant Tern. The bill shapes of these birds are classic Elegant, no sign of the shorter and straighter bill of Sandwich.
So in summary, I do not think the current bird is a hybrid. I think it is a dark billed Elegant Tern.
Alvaro

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

-----Original Message-----
From: CALBIRDS@groups.io <CALBIRDS@groups.io> On Behalf Of John Sterling
Sent: Sunday, June 16, 2019 8:38 PM
To: jtnikon@...
Cc: EBB-Sightings@groups.io; calbirds@groups.io
Subject: Re: [CALBIRDS] [EBB-Sightings] Sandwich Tern (6/16/2019) - photos

I received a text message from an expert who I totally trust who saw the bird and determined that it was a hybrid. I’ll let him comment but just wanted to get the word out. Several records in recent years in California have proven to be hybrids. I’m in China so I haven’t seen the bird.
John Sterling
530 908-3836
26 Palm Ave
Woodland, CA 95695

On Jun 17, 2019, at 10:26 AM, Jerry Ting via Groups.Io <jtnikon=yahoo.com@groups.io> wrote:

As Bob Toleno stated in his previous posts, the Sandwich Tern reported by Bob Richmond and John Luther continued to be seen in the tern colony pond in Hayward Marsh that can be seen (using a scope) from the Least Tern sign and spent most of the time preening on the south side of the island (37.630029, -122.144366) on northeast of the Least Tern island. I have included 2 distant shots of the bird in my eBird report in which you can see the yellowish tip on the dark bill and dark legs.

https://ebird.org/view/checklist/S57431258

Happy Birding,
Jerry Ting
Fremont







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Re: [CALBIRDS] [EBB-Sightings] Sandwich Tern (6/16/2019) - photos

John Sterling
 

Very good Alvaro. Thanks.
John Sterling
530 908-3836
26 Palm Ave
Woodland, CA 95695

On Jun 17, 2019, at 11:58 AM, Alvaro Jaramillo <chucao@...> wrote:

John
Before the hybrid hypothesis catches too much fire. I am convinced that these birds are dark billed Elegants. Dark on the bill in Elegant Terns is common, the rarity in these cases is the extent. They can be nearly all black, like this one I saw in 2013 here in Half Moon Bay:

https://www.flickr.com/photos/alvarojaramillo/9442203562/in/photolist-XsSNif-wSAYus-wnvJR7-fCuq4m-fo8utM-fonLa9-fdmzyT-fdmziP-fdmzr8-dUozc2-d75zfy-d75yGs-d75BBs-cRqARh-agA1zx-9VJghg

The hybrids that have been identified on Isla Rasa, Baja California to my eye are again just Elegants with dark on the bill. There are color photos in the paper:
http://www.marineornithology.org/PDF/40_1/40_1_25-29.pdf
They spot various birds with dark on the bill, and assume they are all backcrosses from some original hybridization some time back. But they did not see any Sandwich (Cabot's) Tern while they performed their study. Again, I do not think they were considering that these were merely a variation in Elegant Tern. The bill shapes of these birds are classic Elegant, no sign of the shorter and straighter bill of Sandwich.
So in summary, I do not think the current bird is a hybrid. I think it is a dark billed Elegant Tern.
Alvaro

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

-----Original Message-----
From: CALBIRDS@groups.io <CALBIRDS@groups.io> On Behalf Of John Sterling
Sent: Sunday, June 16, 2019 8:38 PM
To: jtnikon@...
Cc: EBB-Sightings@groups.io; calbirds@groups.io
Subject: Re: [CALBIRDS] [EBB-Sightings] Sandwich Tern (6/16/2019) - photos

I received a text message from an expert who I totally trust who saw the bird and determined that it was a hybrid. I’ll let him comment but just wanted to get the word out. Several records in recent years in California have proven to be hybrids. I’m in China so I haven’t seen the bird.
John Sterling
530 908-3836
26 Palm Ave
Woodland, CA 95695

On Jun 17, 2019, at 10:26 AM, Jerry Ting via Groups.Io <jtnikon=yahoo.com@groups.io> wrote:

As Bob Toleno stated in his previous posts, the Sandwich Tern reported by Bob Richmond and John Luther continued to be seen in the tern colony pond in Hayward Marsh that can be seen (using a scope) from the Least Tern sign and spent most of the time preening on the south side of the island (37.630029, -122.144366) on northeast of the Least Tern island. I have included 2 distant shots of the bird in my eBird report in which you can see the yellowish tip on the dark bill and dark legs.

https://ebird.org/view/checklist/S57431258

Happy Birding,
Jerry Ting
Fremont







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Sandwich Tern

Mark Stephenson
 

I privately emailed the observers that saw the “Sandwich Tern” early today and let them know that a Hybrid/ dark billed elegant would be much more likely than an actual Sandwich Tern. Bob Toleno said it appeared that the yellow bled into the lower mandible further than typical which would point towards hybrid/dark billed elegant. Glad somebody else is on the same page as Lucas and I. (Elegant tern background).  Happy BirdingMark&Lucas Stephenson

Re: Sandwich Tern (6/16/2019) - photos

Todd Easterla
 

Surprised no one, other than John Sterling who is out of the country has commented whether the TERN seen and photographed today by a small group of birders was or is a hybrid, or not....? Fritz Steurer and my self did not actually see the bird, but were shown images of the bird and it seemed to clearly show a small amount of orange on the bill, about Midway down the bill mostly on the lower mandible, which would clearly put this bird on the hybrid side.Maybe, it was just an artifact of light but in the photo on the back of the photographers camera it sure seemed to be orange in color, with a yellow tipped mostly black bill.Maybe this group and the photographer will post something about it at a later date ( hopefully sooner than later) so others that don't want to chase a possible hybrid, will not.Thanks,Todd EasterlaEl Dorado Hills, Ca.Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------From: John Sterling <jsterling@...> Date: 6/16/19 8:37 PM (GMT-08:00) To: jtnikon@... Cc: EBB-Sightings@groups.io, calbirds@groups.io Subject: Re: [EBB-Sightings] Sandwich Tern (6/16/2019) - photos I received a text message from an expert who I totally trust who saw the bird and determined that it was a hybrid. I’ll let him comment but just wanted to get the word out. Several records in recent years in California have proven to be hybrids. I’m in China so I haven’t seen the bird. John Sterling530 908-383626 Palm AveWoodland, CA 95695> On Jun 17, 2019, at 10:26 AM, Jerry Ting via Groups.Io <jtnikon=yahoo.com@groups.io> wrote:> > As Bob Toleno stated in his previous posts, the Sandwich Tern reported by Bob Richmond and John Luther continued to be seen in the tern colony pond in Hayward Marsh that can be seen (using a scope) from the Least Tern sign and spent most of the time preening on the south side of the island (37.630029, -122.144366) on northeast of the Least Tern island.  I have included 2 distant shots of the bird in my eBird report in which you can see the yellowish tip on the dark bill and dark legs.> > https://ebird.org/view/checklist/S57431258> > Happy Birding,> Jerry Ting> Fremont> > > >

Monday morning in Heather Farm Park

rosita94598
 

It is not that we have not continued to check birds in Walnut Creek, but there has not been a reason to report anything special until today.  And even the concept of special is subject to interpretation.  Today we had an adult Black-crowned Night-Heron for the first time in a long while, and as we were walking north on the east side of the large pond, Fred spotted something flying south over the water--a Great Blue Heron.   We have not seen one of them in the park for a long time, either.
Otherwise it was plenty of House Finches, Black Phoebes, both Nuttall's and Downy Woodpeckers making noise or being seen, along with some Barn, Violet-Green and Cliff Swallows.  The latter were over the canal bridge spanning the concrete channel of Walnut Creek below the Seven Hills School.  We often see a Red-shouldered Hawk, Song Sparrows are around the entire pond, the occasional Cal Towhee and usually a family of Bushtits, all of which are the regular population in the park and why there has been not much point in reporting.
Hugh B. Harveyalive and well in Walnut Creek

Re: Sandwich Tern (6/16/2019) - photos

Jerry Ting
 

Serve as a messenger here.
Bob Dunn finds some information on Sibley Guides website about the juvenile/immature Sandwich Tern bill coloration which might stir up more discussions about this interesting tern found in Hayward Marsh. Here is the link: https://www.sibleyguides.com/2007/08/sandwich-tern-bill-color-of-juveniles/?fbclid=IwAR0e1PS7dcTSMPX4WTDSbNvYtN_VO__MEKCUaltwbHjbG5qH4bjIAW7u3jI

And here is the link to images with different colors/shapes of presumed juvenile SATE or possible SATE x ELTE hybrid: http://www.martinreid.com/Main%20website/SATE.html

I have changed my eBird sighting from SATE to SATE x ELTE (with the comments that it could be as well a dark billed ELTE) and added 2 more photos. Here is the updated checklist: https://ebird.org/view/checklist/S57431258

Happy Birding,
Jerry Ting
Fremont

Re: [CALBIRDS] [EBB-Sightings] Sandwich Tern (6/16/2019) - photos

Bob Toleno
 

As one of the observers who saw a medium-sized dark-billed tern with a
yellowish bill tip yesterday at Hayward Regional Shoreline, i want to lay
out the timeline and my own analysis of the situation as i see it. On 6/15
at 2:40pm, Bob Richmond found, and then later both he and John Luther
observed what they described as an adult Sandwich Tern in the main tern
nesting pond at Hayward Regional Shoreline. Their observations are recorded
in the eBird checklists below:
https://ebird.org/view/checklist/S57415267
https://ebird.org/view/checklist/S57413288

I can't comment on their sightings other than to note that they were likely
significantly closer than we were for the majority of their observation
time than i and the other observers the next day were. (They are both
permitted to be inside an area where the general public is not allowed.)
Also, i don't know of any photographs that either of them acquired on 6/15.

The next morning (6/16), Jerry Ting, Juli Chamberlin, Bob Dunn, Joel Herr,
and myself spent several hours scoping the tern nesting pond from the Least
Tern sign, the closest publicly accessible spot to view this pond. Jerry
had arrived the earliest, and had already observed a few Elegant Terns
along with one dark-billed tern with a yellowish tip that he obtained a
distant, blurry flight shot of. All of those terns had settled on the far
side of the NE island in the tern pond by the time the rest of us had
arrived. This island is roughly 300-350 meters from where we were standing.
Knowing the bird in question was likely on the back side of that island, we
kept a close watch there.

While we waited, an Elegant Tern or two would occasionally pop up from the
back side of the NE island, then settle back down, sometimes in view,
sometimes out of view. About 70-80 minutes after Juli and i arrived, a
medium-sized black-billed tern with a yellowish tip to the bill flew out
from the back side of that island and landed on the front side, where it
spent the next 15-20 minutes preening and getting us all very excited.
Through our 85mm Swarovski ATX scope with 50x magnification and a 1.7x
magnification extender, we could tell that the bill tip was distinctly
yellowish, with the yellow restricted to approximately the last one inch of
the bill. One oddity was that there seemed to be some pale coloration at
the base of the bill, visible with scope magnification cranked up to the
max (~85x). We knew that some juvenile Sandwich Terns show pale coloration
beyond the tip, but in other respects the bird appeared to be an adult (and
had been described as an adult bird by the two observers from 6/15). The
forehead showed some white, which seemed to indicate it was starting to
transition from alternate to basic plumage, though the black covered the
crown and extended down to the nape. Wing color appeared very pale gray
with darker gray wingtips, and legs were pure black. Crest did not appear
quite as long and shaggy as Elegant Terns.

After approximately 15-20 minutes of preening on the front of that island,
the bird in question flew. It circled around the back of the tern pond then
turned and headed roughly in our direction toward the bay. While flying
past us at a distance of no more than 20-40 meters, Jerry Ting managed to
get a couple of flight shots of the bird, which can be seen in his eBird
checklist here:
https://ebird.org/view/checklist/S57431258

Those shots clearly show fairly extensive orange coloration at the base of
both the upper and lower mandible. They also show the yellow coloration at
the tip seeming to blend somewhat with the black coloration and extend
further down the bill instead of ending in a crisp demarcation that would
normally be expected on Sandwich Tern. The structure of the bill also seems
longer and "droopy" at the tip, exactly like the structure of an Elegant
Tern bill. None of this was evident from our distant scope views, but i'm
confident that the bird in the flight shots is the same one we observed
preening on the front of the island. When i shared this photo with Alvaro
Jaramillo, his opinion was that the photographed bird is an aberrant
dark-billed but otherwise pure Elegant Tern, not a hybrid. Other expert
opinions may differ, but it seems clear that either way, the bird we
observed on 6/16 was not a pure Sandwich Tern.

This leaves open the question about the bird observed on 6/15. I see just
two possibilities:
1) There were two medium-sized terns that both have mostly black bills with
a yellow tip, both present in the same area at roughly the same time,
associating loosely with a small flock of Elegant Terns, one of which was
seen by on 6/15 but (probably) not photographed, and one of which was seen
and/or photographed on 6/16 by myself and others, *yet at no time did any
observers see these two dark-billed terns with yellowish bill tips together*
.
2) There was just one tern with a yellow-tipped black-ish bill, and the
bird seen on 6/15 is the same tern that Jerry photographed on 6/16.

Given the relative rarity of dark-billed Elegant Terns in general, and the
extreme rarity of Sandwich Terns in California, it seems to me unlikely
that one of each would show up at the same time in the same place, but
never be observed together. In the absence of any other photographic
evidence or further sightings of the putative second bird, i think the most
parsimonious explanation is possibility #2 above. I was not present on
6/15, and the observers on that date were very likely much closer to the
bird than we were, so it is entirely possible that the "two-bird theory" is
true. I'll let the observers from 6/15 make their own case for their
sighting. I've edited my own eBird report to dark-billed Elegant Tern for
the bird i observed on 6/16.

Bob Toleno
Hayward

On Sun, Jun 16, 2019 at 10:27 PM Todd Easterla <teasterla@...>
wrote:

Surprised no one, other than John Sterling who is out of the country has
commented whether the TERN seen and photographed today by a small group of
birders was or is a hybrid, or not....? Fritz Steurer and my self did not
actually see the bird, but were shown images of the bird and it seemed to
clearly show a small amount of orange on the bill, about Midway down the
bill mostly on the lower mandible, which would clearly put this bird on the
hybrid side.

Maybe, it was just an artifact of light but in the photo on the back of
the photographers camera it sure seemed to be orange in color, with a
yellow tipped mostly black bill.

Maybe this group and the photographer will post something about it at a
later date ( hopefully sooner than later) so others that don't want to
chase a possible hybrid, will not.

Thanks,

Todd Easterla
El Dorado Hills, Ca.






Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------
From: John Sterling <jsterling@...>
Date: 6/16/19 8:37 PM (GMT-08:00)
To: jtnikon@...
Cc: EBB-Sightings@groups.io, calbirds@groups.io
Subject: Re: [EBB-Sightings] Sandwich Tern (6/16/2019) - photos

I received a text message from an expert who I totally trust who saw the
bird and determined that it was a hybrid. I’ll let him comment but just
wanted to get the word out. Several records in recent years in California
have proven to be hybrids. I’m in China so I haven’t seen the bird.
John Sterling
530 908-3836
26 Palm Ave
Woodland, CA 95695

On Jun 17, 2019, at 10:26 AM, Jerry Ting via Groups.Io <jtnikon=
yahoo.com@groups.io> wrote:

As Bob Toleno stated in his previous posts, the Sandwich Tern reported
by Bob Richmond and John Luther continued to be seen in the tern colony
pond in Hayward Marsh that can be seen (using a scope) from the Least Tern
sign and spent most of the time preening on the south side of the island
(37.630029, -122.144366) on northeast of the Least Tern island. I have
included 2 distant shots of the bird in my eBird report in which you can
see the yellowish tip on the dark bill and dark legs.

https://ebird.org/view/checklist/S57431258

Happy Birding,
Jerry Ting
Fremont








Hayward Elegant Tern question

SteveLombardi
 

Maybe I missed it with all the postings about terns at Hayward, but are the Elegants breeding there?
If so, is this the first season that Elegants have bred at Hayward?

As you probably know, Elegant Terns are nesting for the first time at Don Edwards NWR at the west end of the Dumbarton Bridge.

Steve Lombardi
San Ramon

Hooded Orioles

Derek
 

While editing my ebird entries from this afternoon's bike ride along
the east bay shoreline, including a pair of Hooded Orioles at Oyster
Bay, i noticed a shadow larger than the usual hummingbird's coming
from outside the front window of my house on Dudley Ct. in Piedmont.
I peeked through the blind to find a female Hooded Oriole a couple
feet away in our grevillea bush. I believe this is the first one in my
yard in a couple years; when seen here it's always been in the same
bush.

Derek Heins

Chestnut-sided Warbler in North Berkeley

Oliver James
 

Hello East Bay Birders,

An adult male Chestnut-sided Warbler was first detected singing and then located @ 1 pm on Saturday June 22nd in North Berkeley near Live Oak Park. No photos were obtained. I've not checked to see if this bird continues today (Sunday the 23rd).

Location: Cordonices Creek crosses underneath Walnut St. on the eastern border of Live Oak Park in North Berkeley. Bird was heard and seen in the flowering trees in the creek bed just east of where Cordonices Creek crosses under Walnut St.

Good birding,

Oliver James

Re: Chestnut-sided Warbler in North Berkeley

Derek
 

I tried for it for about 90 minutes this morning starting at 7:30
(with Henry Burton) and then again at noon but no luck. I've never
been there before and was surprised how birdy it was. I posted ebird
using the Rose Garden hot-spot which is adjacent to the park and was
included in the area I birded.

https://ebird.org/view/checklist/S57620039

Derek Heins

On Sun, Jun 23, 2019 at 8:13 AM Oliver James <ojames@...> wrote:

Hello East Bay Birders,

An adult male Chestnut-sided Warbler was first detected singing and then located @ 1 pm on Saturday June 22nd in North Berkeley near Live Oak Park. No photos were obtained. I've not checked to see if this bird continues today (Sunday the 23rd).

Location: Cordonices Creek crosses underneath Walnut St. on the eastern border of Live Oak Park in North Berkeley. Bird was heard and seen in the flowering trees in the creek bed just east of where Cordonices Creek crosses under Walnut St.

Good birding,

Oliver James


Summer Tanager on Mount Diablo

Robert Raffel
 

A Summer Tanager was spotted today along Green Ranch Road on Mount Diablo. I did not see it when I hiked out, but on my return trip, it flew across the road in front of me. More details on ebird. https://ebird.org/view/checklist/S57629229


Robert Raffel

Hooded Orioles and Black-Headed Grosbeak in Hercules

Susana dT
 

We had three pairs of Hooded Orioles at out feeder this season and they are now bringing their kids. There was a little bird bath fight today, video here:
https://www.flickr.com/photos/166553264@N04/48136142101/in/dateposted-public/

A male Black-Headed Grosbeak has been a regular at the feeder too, I have not seen a female yet. Video here:
https://www.flickr.com/photos/166553264@N04/48136143391/in/dateposted-public/

Blue-gray gnatcatchers on lower Meadows Canyon Trail, Tilden

Pam Young
 

Two blue-gray gnatcatchers - appeared to be one male and one female - foraged on and near lower Meadows Canyon Trail in Tilden Park on Saturday afternoon, June 29.

Good birding!

Pam Young
Berkeley

Hooded Orioles and Black-Headed Grosbeak in Hercules

Susana dT
 

The Hooded Oriole families are hanging out near the feeder. I am replenishing it twice a day now. I have a hard time distinguishing mother from kids, these might be 4 kids and adult male. Video here:
https://www.flickr.com/photos/166553264@N04/48176600122/in/dateposted-public/

The Black Headed-Grosbeak decided to try the Oriole's menu. Video here:
https://www.flickr.com/photos/166553264@N04/48176597737/in/dateposted-public/

Re: Blue-gray gnatcatchers on lower Meadows Canyon Trail, Tilden

Jay
 

On Jul 1, 2019, at 1:16 PM, Pam Young via Groups.Io <pamyoung2=mac.com@groups.io> wrote:

Two blue-gray gnatcatchers - appeared to be one male and one female - foraged on and near lower Meadows Canyon Trail in Tilden Park on Saturday afternoon, June 29.

Good birding!

Pam Young
Berkeley