I have been wondering about this for years. Vaux's Swifts nest to the north of us, in places like the Napa Valley; they nest to the south of us, in San Jose. Baby Vaux's Swifts found in a fireplace

On a bird walk in El Cerrito Hillside Natural Area yesterday I saw a pair of swifts swirl around each other and fall through the air. Twice. I assume this was a courtship fall. Try as I might, I

Nice find Ethan that's an impressive flight! After multiple visits to the Highland Ridge flight sites this spring that require hiking over a mile and around 800 ft elevation gain to reach, I would

Also... I have made this location a hotspot (it should appear on the maps in ~24 hours) so if you do investigate for yourself, please submit all ebird lists for this location to the “Mt. Diablo

This morning close to the summit of Mt. Diablo I fulfilled a long time dream of mine by stumbling upon a fantastic show of diurnal migration!—entirely by accident. I’ve spent years now

Mountain biking Brionnes today, I saw a Lawrence’s goldfinch pair south of the highpoint of the Old Brionnes trail about 75 yards south on the crest trail. I saw them several times on the fence -

Not being home much the last three weeks, it was nice to be back in my stomping grounds yesterday and today. The park was really quiet Friday, I have no idea.why. It was a little better today, but

Great diversity moving, flycatchers, vireos, warblers, tanagers and grosbeaks - and the accipiters that follow them. No big waves but a steady stream this morning. Moving warblers are females, males

Hello, I was very surprised to find at least 20 Western Tanagers in the Ken Mercer park. They were in groups of 2 to 8 in different areas, mostly going from eucalyptus trees to pine trees. Here is my

I am continually amazed by how good observers birds are. The yard suet feeder went empty. Before filling it I looked around . No birds in sight or calling. I filled it, stepped back 10 feet and

Sorry for the late post. On 5/10 AM on my way to the summit, I ran into a flock of 63 Swainson's Thrushes and 9 West Tanagers in the parking lot. I could not find any other birds in the flock. See

The weather has been tough for weekend birders like myself with every weekend day but one this spring a cold front has moved in and dispersed migrants that have moved, and no active migration on a big

I followed your lead and found this spot this morning. There are some mighty big tom turkeys here. Saw the western Tanager, white breasted Nuthatch, Yellow Warbler and a number of starlings. Also

The last wintering sparrow I saw in my yard was a White-throated sparrow(!) on April 26. Was gone by the weekend I’m pretty confident. Jay Dodge Berkeley

For the last several days we have had several Western Tanagers (certainly 6, perhaps 12) of all ages at the north end of Homestead Rd. Today Walt D. and I watched the Eucalyptus for several minutes,

In the past they and the white crown were usually gone by April 15th but this year not until April 25th. Idell in El Sobrante

A Golden-crowned Sparrow continues to hang around in my backyard. Every time I think it will have left for migration it shows up in the morning and again in the late afternoon/early evening. It was

I’m in the sun below and east of Vollmer. Multiple tanagers, hemit and Townsends warblers moving through. I thinks its foggy west of Vollmer so they are moving through my neighborhood in the sun -

This spring, Phil Georgakakos, Alex Henry, and I wanted to explore some of the more remote parts of Alameda county. So last weekend we spent Friday, Saturday, and Sunday (April 29-May 1) backpacking

Hello everyone, Yesterday, I observed an interesting behavior happen between two Red-shouldered Hawks, in Pleasanton. One had just caught a rat and settled on a branch to eat it when a second hawk