Hi Rusty - I think instead that the early arrivers are full adults. In Bolinas Lagoon, we have been seeing increasing numbers in March-May from the late 1980s until now, so the information in BoW is o

Hi all - This leucistic Oregon Junco has been in this location (near 10th and Fulton) for at least a couple of years. I photographed it last September https://ebird.org/checklist/S120263101 in the hop

Nine REPH flew over the SW arm of Lake Merced this morning and 3-4 more were swimming around in the NE section. Also 14 Barn Swallows in the SE section of the NW arm, the only swallow species present.

Hi Bob and all- Xeno-canto has a good selection of calls from each species https://xeno-canto.org/explore?query=winter%20wren https://xeno-canto.org/species/Troglodytes-pacificus and the birds in the

We were able to confirm the WIWR first reported by Scott Bowers and Anna Klafter on 3 January and heard and seen briefly by Rudy Wallen and myself that evening. It favors the large and dense clump of

Briefly at 0825. Will post photos later today. Last time we had one it hung out with the collared-doves and was observed flying around Noriega and 29th, including on the roof of the church along the e

This may help - https://www.birdpop.org/docs/pubs/Pyle_2020_Molt_Age_and_ID_of_MABO_and_NABO.pdf I remain confident that this was a Nazca based on the concave and lumpy bill shape with bulbus tip (giv

This appears to have been another good breeding season for BRPEs. Yesterday Bolinas Lagoon was filled with >2000 birds, the majority of which were fresh juveniles. Hopefully the starvation in SoCal re

Had a male Allen's Hummingbird zing by going N mid-morning. I think this is the earliest I've had one in the Bay Area by at least a few days. They seem to be getting earlier every year- it used to be

I asked Mark Dettling of Point Blue for an update on this project and it is pasted in below. I too have been seeing these banded birds regularly at the east end of the Concrete Bridge - all adults thi

Greetings, I'm unsure how interested SF birders are in Scaly-breasted Munias but by all accounts the ones that have been observed in SF over the past 2-3 years are part of a dispersing and potentially

Yes, it's nearing completion of the second prebasic molt (p8 growing, p9-p10 juvenile) which puts it at 15-18 months of age. The bill color changes that Al mentions are good for telling these from oth

Got a report from Kirsten Lindquist of the Greater Farallon Association of some Cook's Petrels and other interesting tubenoses seen during the ACCESS cruise over the past three days: July 24 - Hawaiia

I had a brief look at a distant frigatebird sp. flying south off Slide Ranch at 10:37 this morning. I wasn't sure enough to report until I was able to confirm it on my laptop this evening (no receptio

Hi Joel - There's a small colony on the buildings to the north of the Thompson Reach mouth, just the other side of the bridge (Doyle Drive) from Quartermaster Reach. https://ebird.org/checklist/S87559

Hi all - I've been asked by several of you about the subspecies/age/sex of the wagtail present yesterday in Quartermaster Reach. I had designated it an adult female lugens ("Black-backed Wagtail," a s

This morning at 0822 near small clearing NE of (below) Stow Lake. More details and bad photo: https://ebird.org/checklist/S83251573 Cheers, Peter

Hi Brian - I would guess (tentatively) either thresher shark or white shark based on your description of size and behavior. No other sharks around here typically jump out of the water and many are not

https://ebird.org/checklist/S80372380 Seems too early for a migrant so perhaps wintered somewhere in the heights cheers, Peter

I first observed it in March 2020 https://ebird.org/checklist/S66295358 as well as this past fall. P