Re: SWAINSON'S THRUSH
Dear Sylvia and EBB,toggle quoted messageShow quoted text
Just to add my two cents. The "Birds of Northern
California" is an amazing resource and has more
than stood the tests of time since its
publication. Just to emphasize what Joe said,
the Swainson's Thrush bar graphs on p. 58 shows
this thrush in two roles. The first is its role
as a breeding summer resident in the wet coastal
forests and mountains of northern California and
the second is as a passage migrant both through
areas where they breed and areas where they do
not. If you live on the wet bayside coast of
Alameda or Contra Costa counties where these
birds breed, then the first bar graph is your
best guide, otherwise, the second bar graph will show you when to expect them.
For what it's worth, at the Coyote Creek Riparian
Station near Milpitas, we banded 2458 Swainson's
during the spring passage from 1986-1996 and 1996
Swainson's during the fall passage for those same
years. This is a location where this thrush has
not nested in a hundred years, so these are all
passage birds. For the fall passage the 5th
percentile date for these records was 3 Sep and
the 95th percentile date was 13 Oct (that is, 90%
of all birds came through between 3 Sep and 13 Oct).
At 09:23 PM 9/1/2016, Joseph Morlan jmorlan@... [EBB_Sightings] wrote:
Re: SWAINSON'S THRUSH
Golden Gate Audubon hosts a digital version of "Birds of Northern
California" which has useful bar-graphs showing expected arrival and
The graph on page 58 shows Swainson's Thrush to be common through early
September becoming uncommon through the end of the month and rare through
indicates the species departs Marin County in mid-October.
On Thu, 1 Sep 2016 19:30:52 -0700, "Sylvia Sykora slsykora@...
[EBB_Sightings]" <EBB_Sightings-noreply@...> wrote:
How late do Swainson's Thrush remain here in autumn? I've had one coming to the water, morning and evening, all week, latest today, Thursday, September 1.--
Joseph Morlan, Pacifica, CA
Re: SWAINSON'S THRUSH
Bob Power <rcpower@...>
This may or may not be helpful, from PRBO's species account (yes, I know -- Pt. Blue).
Departure date from breeding grounds: According to McCaskie (1988), departs Coast and Mountain regions late August through October. PRBO banding data for Marin County (1996 and 1997) -- latest capture dates October 16, 1996 and October 4, 1997.
Spring and Fall migration period: While SWTH is rare in Interior and Basin regions during the summer months, abundance peaks in Spring (April through May) and Fall (August through September) in these regions (McCaskie 1988) -- possibly indicating peak of Spring and Fall migration period in California.
And at the same time, we're on the front end of Hermit Thrush arrival dates.
How late do Swainson's Thrush remain here in autumn? I've had one coming to the water, morning and evening, all week, latest today, Thursday, September 1.
nr. Skyline and Castle
Baird's Sandpipers at Waterbird Park, Martinez
I plead guilty to putting sightings on eBird and not posting. So I'm going to engage in some behavior modification going forward.
Six East Bay birders stopped at the park when returning from Napa. We birded from the main parking lot, then went to the west side of the park via Arthur Avenue off I-680. We parked at the first pullout on the service road leading north, then walked to where we could see the south end of the water. Scoping the shoreline and inlets, we found four BAIRD'S SANDPIPERS, then discovered a fifth when scoping from the wood overlook near the tunnel to the plant. The birds were there around 11:45 and remained when we left about an hour later.
eBird report: http://ebird.org/ebird/view/checklist/S31363399
Wilson's Warbler - Antioch yard - 3/31
Yesterday (8/31/2016), we had good looks at a male Wilson’s Warbler that was drinking from the dripper at our bird bath. We also had a Wilson’s Warbler in the yard a week ago.
Paul and Nancy Schorr
Baird's Sandpipers, McNabney Marsh, Martinez
Hugh Harvey and I, after a bit of searching, were able to get a decent look at four BAIRD'S SANDPIPERS on the east edge of the south end of McNabney Marsh (Waterbird Regional Preserve), Martinez. This viewing location is accessed from the service road to the Mt. View Sanitary District offices.
After you pass through the gate at the end of Arthur Rd., park along the narrow asphalt pull-out on the right. Do not park on the grass shoulder. Walk north a hundred yards until you have a clear view of the water. For those unfamiliar with this marsh, here's a Google Maps link: https://goo.gl/maps/XhecUQwoBKS2
The four birds were scattered among just a few Western Sandpipers allowing for an ideal contrast in size, bill shape and overall color tone.
Possible Calidris ferruginea in CoCo County
I've just got hopeful respond opinion from Pete Dunten, Contra Costa eBird reviewer about interesting Calidris, whose I observed recently in Waterbird Preserve in Martinez (see eBird checklist with description of the individual) and Pete's comment)
I would like to add a few more details, which can be helpful in identifying the Calidris but not well seen in my poor quality photos ..... breast is washed with warm orange/peach; rest of ventral white without any markings on belly or flanks, legs definitely black and relatively long.
Is this indeed Curlew Sandpiper?, or something else?. All comments and opinions welcome
Albert W. Linkowski
California Quail chicks - very late brood?
Is this late in the season for such a hatch?
Yesterday, August 28, we had two adult California Quail and six very tiny chicks in our backyard in northeastern Lafayette. It was impressive to see the two adults acting as lookout and guardian. It seemed that one would take a high point and watch the perimeter while the other adult coached. When first observed about 5 pm we could see that one of the chicks was lagging behind and not alert and responsive as the others were. About 6 pm we saw a chick flopping on the ground and clearly in great distress. By 6:30 it was dead. The dead chick's torso was only 5 cm long.Today the two adults and the remaining five are back, working the same ground.
Pectoral Sandpiper - Coyote Hills Aug 28
Yesterday evening while walking around the Main Marsh at Coyote Hills RP, I saw my first Pectoral Sandpiper of the year.
It was foraging with Yellowlegs near the edges of the Marsh.
Contra Costa birds Sunday August 28
Rosita took a walk to Heather Farm after 5 PM and then called me. She had a small duck and a sandpiper at the large, mostly natural pond. It was a Spotted Sandpiper on the rocks along the island edge when seen from the large oak on the west side. The duck was mixed with some Canada Geese by that time. I studied it quite a bit, and it appears to be a juvenile Green-winged Teal. It is mostly colored like the average female duck, but is small, has a black bill and a bit of a buffy streak under the tail. It never opened its wings.
Earlier, I met Stephanie Woods and her husband, Ken, along the bike/walking trial west of the Olympic/Reliez Station Road intersection. They were too far west for the normal location of the Western Screech-Owl which has been reported since February. I told them to meet me farther east along the wooden railing, and sure enough, the owl was in its typical spot about 15 feet up in an oak tree. Chick wrote me after I was home and admitted he was not a botanist/arborist.
Hugh B. Harvey
Re: Screech Owl in Lafayette
We live near there and my wife has seen the same owl two times. The last was with my sister, and they were watching the tree right at dusk, when suddenly, the owl left the tree and flew very close to them. They were awe struck.
Today's GGAS Hayward Shoreline walk was lucky enough to see two cavorting Prairie Falcons just south of Frank's Dump. The two were rough 'n tumble playing over the bay as they flew SW. Both birds seemed streaked and I'm thinking they were juveniles. Siblings?
Screech Owl in Lafayette
About 1/4 mile up from the Lafayette end of the Lafayette-Moraga Trail is a large conifer on the right.
In a large cavity about 15 feet up and plainly visible is a Screech Owl.
Point Reyes 100 Birds Challenge for 100 Years of the National Park Service
Carlo Arreglo <auntiestrophe@...>
The goal of the event was to find 100 bird species on the Centennial Anniversary date of the creation of the National Park Service --also called Founder's Day--and this was no gimme as the date occurred before peak migration. However, birders from Vallejo, Napa, Berkeley, San Francisco, and Marin County made it out to Point Reyes National Seashore and met at the Bear Valley Visitor Center for the 8:00am start time. Some were familiar faces to me, most new but all made it out there to see if we could grind out 100. Park staff joined in as well. We broke up into squads and covered the locations below.
And I am happy to report that we not only met the goal of 100 but reached 133!
What a wonderful way for this park--well known as a birding hotspot--to celebrate the 100th birthday of the NPS! And this would not have been possible without the sacrifice of time and effort made by the folks below. If there were a prize for most sightings by squad (squad goals?), it would certainly go to Dominik Mosur and Michael Park (joined in part by Noah Arthur). The duo-ish nearly got 100 on themselves at 97 species. The Hamiltons were close at 88 species.
I hope the participants had a fun time! Full list below. Please email me directly if you have any questions. Reporters may have photos of some of the more "highlight" birds. Please also check eBird.
Hope to see you in the seashore soon, thanks, and we'll do this again at the next NPS centennial!Carlo Arreglo
Park RangerPoint Reyes National Seashore--
NPS Centennial Anniversary Event: Point Reyes 100 BirdsChallenge for 100 Years of the National Park Service
August 25, 2016
Participants: Carlo Arreglo, Bob Atwood, Cynthia Boyer, Sarah Codde, John Dell’Osso, Ken Ealy, Daniel George, Denise and David Hamilton, Matt Lau, Dominik Mosur, KathleenMugele, Joey Negranne, Michael Park, PeterSeubert, Sarah Wakamiya, and David Wimpfheimer
Locations:Bear Valley Visitor Center and Earthquake TrailTomales Point Trail
Pierce Point RanchMuddy Hollow Trail Limantour Beach and SpitDrake's BeachRCA BuildingPoint Reyes Lighthouse Fish DocksFive BrooksNorth BeachAbbott's LagoonMt. Vision RoadWhite House poolPierce Point Road, Teal pond and other ponds.
| Red-throated Loon |
| Pacific Loon |
| Common Loon |
| Pied-billed Grebe |
| Red-necked Grebe |
| Sooty Shearwater |
| American White Pelican |
| Brown Pelican |
| Double-crested Cormorant |
| Brandt's Cormorant |
| Pelagic Cormorant |
| Great Blue Heron |
| Green Heron |
| Black-crowned Night-Heron |
| Snowy Egret |
| Great Egret |
| Wood Duck |
| Mallard |
| Gadwall |
| Surf Scoter |
| Ruddy Duck |
| Turkey Vulture |
| Osprey |
| White-tailed Kite |
| Bald Eagle |
| Northern Harrier |
| Cooper's Hawk |
| Red-tailed Hawk |
| American Kestrel |
| Peregrine Falcon |
| California Quail |
| Virginia Rail |
| Sora |
| American Coot |
| Snowy Plover |
| Semipalmated Plover |
| Killdeer |
| Black Oystercatcher |
| Greater Yellowlegs |
| Lesser Yellowlegs |
| Wandering Tattler |
| Long-billed Curlew |
| Sanderling |
| Western Sandpiper |
| Least Sandpiper |
| Baird's Sandpiper |
| Dowitcher sp. |
| Red-necked Phalarope |
| Heermann's Gull |
| Ring-billed Gull |
| California Gull |
| Herring Gull |
| Western Gull |
| Caspian Tern |
| Common Murre |
| Pigeon Guillemot |
| Marbled Murrelet |
| Mourning Dove |
| Band-tailed Pigeon |
| Barn Owl |
| Great Horned Owl |
| Anna's Hummingbird |
| Selasphorus sp. |
| Belted Kingfisher |
| Acorn Woodpecker |
| Nuttall's Woodpecker |
| Downy Woodpecker |
| Hairy Woodpecker |
| Pileated Woodpecker |
| Northern Flicker |
| Red-breasted Sapsucker |
| Western Wood Pewee |
| Dusky Flycatcher |
| Pacific slope Flycatcher |
| Black Phoebe |
| Tree Swallow |
| Violet-green Swallow |
| Cliff Swallow |
| Barn Swallow |
| Hutton's Vireo |
| Warbling Vireo |
| Steller's Jay |
| California Scrub-Jay |
| American Crow |
| Common Raven |
| Chestnut-backed Chickadee |
| Oak Titmouse |
| Bushtit |
| Red-breasted Nuthatch |
| Pygmy Nuthatch |
| Brown Creeper |
| Rock Wren |
| Bewick's Wren |
| House Wren |
| Pacific Wren |
| Marsh Wren |
| Golden-crowned Kinglet |
| Blue-gray Gnatcatcher |
| Western Bluebird |
| Swainson's Thrush |
| American Robin |
| Wrentit |
| Cedar Waxwing |
| Orange-crowned Warbler |
| Yellow Warbler |
| Black-throated Gray Warbler |
| Townsend's Warbler |
| Hermit Warbler |
| American Redstart |
| MacGillivary's Warbler |
| Wilson's Warbler |
| Common Yellowthroat |
| Western Tanager |
| Spotted Towhee |
| California Towhee |
| Chipping Sparrow |
| Savannah Sparrow |
| Song Sparrow |
| Lincoln's Sparrow |
| White-crowned Sparrow |
| Dark-eyed Junco |
| Red-winged Blackbird |
| Tricolored Blackbird |
| Brewer's Blackbird |
| Brown-headed Cowbird |
| Purple Finch |
| House Finch |
| Pine Siskin |
| Lesser Goldfinch |
| American Goldfinch |
| Wild Turkey |
| Eurasian Collared Dove |
| European Starling |
Contra Costa county 8/18 Baird's Sandpipers
Sorry for the belated report.
Had a fun final day birding Contra Costa county last Thursday, 8/18. The encroaching mid-fall migrant push offered a diversity of passerines at a number of destinations.
I started off the morning waking up late, and not getting out to East County until past 9. Still there were quite a few nice birds scattered around. I started at Bethel Island, mostly looking for migrants at Piper Slough, Willowest Marina and the Frank's Tract overlook. The migrant diversity was quite nice around the island, with highlights including:
Rufous/Allen's Hummingbird-11 including many recently returned migrants (my first for of season for East county) on the "Magic Bottlebrush" by Willowest Marina
Northern Flicker-1 migrant
Pacific-slope Flycatcher-5 including a singing bird
Warbling Vireo-1 at Willowest
Bank Swallow-2 birds still lingering, foraging low over Piper. My lack of a scope meant I could not (effectively) sort through the swallow swarms at the Frank's Tract overlook, so there may have been more buried in there. Still, Steve Glover's and others' intense coverage of this spot mid-August through winter and Spring for many years where they did not see this species regularly makes me believe these seemingly staging birds leave around this time of year
Yellow Warbler-14 was a good sign that Fall migration is progressing. These guys will only get more common as the season continues.
Hermit Warbler-1 by willowest
Yellow-breasted Chat-3 different calling birds at Piper seemed odd: late breeders that evaded detection for nearly a month, or migrants?
Full eBird checklists here:
From there I proceeded onto the Holland Tract. While my visit was somewhat late in the day (curses) there was still an incredible wealth of birds. However, I visited some sites that were legally dubious, and asked some farmers to get tentative permission. For these reasons, I will not disclose where on the tract these birds were, but needless to say, if we can get an arrangement between the local landowners and birders this would allow us to view possibly the best shorebird and migrant passerine habitat in all of east county. Highlights, from just a small bit of walking around, were:
Wood Duck-28 in stagnant ponds explained where flying birds of this species seen at this tract come from
Ring-necked Duck-3 were pretty exceptional in Contra Costa in summer, but perhaps even regular at this site??
Black-necked Stilt-5. Normally any shorebirds are hard at the Holland Tract
Mourning Dove-110 was a good concentration for summer
Ash-throated Flycatcher-1 was a good fall migrant for east county
Bewick's Wren-1 was a rarity for Holland Tract, and my first
Black-throated Gray Warbler-1 along main, public road in cottonwoods
California Towhee-1 was a rarity for Holland Tract, and my first
Full eBird list here: http://ebird.org/ebird/view/checklist/S31143438
From there I continued onto the east end of Orwood road to check on my staked-out flooded fields and was amazed to see they were GONE! While this was a sad sight for me this ultimately indicative of the ephemeral nature of water in East County: if you find water, its likely not there for long, and you'll have to start searching again! Even without water, though, I still managed to find:
Lesser Goldfinch-2 is an interesting species in East county. They seemed to have expanded, possibly through the "greenery belt" created by development through antioch and through to east county in the past 10 or so years. Other recent colonizers include California Towhee and Anna's Hummingbird. It will be interesting to see what comes next!
Full eBird checklist here: http://ebird.org/ebird/view/checklist/S31143779
Left Orwood Tract with a healthy sum of 90 species.
On to Iron House Sanitary District, which continues to depress me, though a flock of Gulls and shorebirds concentrating on the levee was exciting. Rare shorebirds and gulls have been seen roosting in with the expected species when they concentrate like that on the levee. Highlights here included:
Black-necked Stilt-18 was my highest count here in a while, concentrated on the levee
Rock Pigeon-1 out of place bird roosting under the oak right across from the deep pond. Odd there!
Blue Grosbeak-6 was the continuing family group by the entrance
Full eBird list here: http://ebird.org/ebird/view/checklist/S31144370
From there, since I lacked a scope, and hence could not bird the central waterbird spots, I blasted straight to the West County WTP. Highlights here were:
BAIRD'S SANDPIPER-1 continuing, but not present when I arrived (present when I checked 30 minutes later)
Lesser Yellowlegs-2 but surprisingly no Greaters!
Western Gull-250 at the tank south of the Solar Panels
Full eBird checklist here: http://ebird.org/ebird/view/checklist/S31145233
From there I headed on to my new-found birding destination in the county: Point San Pablo. Sure enough, it was productive, especially in the oaks on the leeward side of the peninsula. Highlights included:
Full eBird checklist here: http://ebird.org/ebird/view/checklist/S31146433
From there, I continued on to Meeker Slough and the San Francisco Bay Trail. It was low tide, and mudflats extended past the breakwaters south of Meeker as well as at the slough itself. There were some nice shorebird concentrations, and highlights included:
Greater Scaup-2 continuing summering birds
Black-necked Stilt-1 calling from pond, implying shorebird habitat in there...
Black-bellied Plover-200 in a flock on the mudflats south of the breakwater. I deeply regretted not looking at them to realize they were BB Plovers (as this is my largest ever flock in the county, and this would be the place to have a Golden) when they were perched, and only noticed when they were flying away. So, any shot at a Golden Plover was crushed.
Full eBird list here: http://ebird.org/ebird/view/checklist/S31146875
After that, I decided to cut the day short at 7pm still with a couple hours of light. This was my final full day in Contra Costa county likely til winter, so it was nice to end up with a fine total of 110 species.
The following day, 8/19, I was dropping my car off in Richmond for storage and decided to make one final stop at Pt. San Pablo. Even though it was not as early as I would've liked, there were still some migrants, as well as turnover from the previous day:
BROWN CREEPER-1 seemed like an untimely migrant, calling in the oaks
Blue-gray Gnatcher-3 including 2 seen was a good count for West county
Yellow Warbler-9 notice the overnight change in the Yellow:Wilson's Warbler ratio
Purple Finch-2 are apparently regular here?? (seems odd)
Full eBird checklist here: http://ebird.org/ebird/view/checklist/S31154002
Was nice to bird Contra Costa more extensively than ever this summer, and I learned all kinds of new and cool spots to visit. Hopefully there will be more interesting and exciting birds waiting in winter!
Re: Water for birds
Thanks for suggesting, Verne! For the same reason, I recently got a few
clear saucers from East Bay Nursery and nestled them into my camellia
bushes to provide water sources for feathered friends. The Juncos have
already discovered them!
Miller Knox Phalarope
Yesterday, August 25, mid afternoon at Miller Knox Regional Shoreline Park, Pt. Richmond there was one Red-necked Phalarope on the lagoon. Also present along the lagoon edge, one Black-bellied Plover and three Killdeer. Quite quiet otherwise. A handful of W. Bluebirds and a fairly large flock of foraging House Finches. Heard Nuttall's, but did not see.
Water for birds
Yesterday, for the first time, I saw "my" local Cooper's Hawk drinking from the water saucer I keep filled on the patio fence.
With the ongoing restrictions on irrigation and the conversion of lawns to drought-tolerant plants, fresh water supplies for local birds with limited ranges can be a challenge. Please consider conserving a little amount of water in other places and putting out a small, clean, and dependable water saucer for them.
NPS Centennial, Point Reyes 100 Birds
Carlo Arreglo <auntiestrophe@...>
For anyone counting, we have reports from Five Brooks, Earthquake Trail, Bear Valley Visitor Center and have 53 species and counting. Waiting on reports from the beaches, lighthouse, Chimney Rock, and Abbott's Lagoon. Hope to get 100 to celebrate 100 years of the National Park Service.
Point Reyes National Seashore