Date: 6/13/26 11:24 am From: Ginger Langdon-Lassagne via groups.io <binzer...> Subject: [slocobirding] Bird Atlas Update: Big Weekend Results!
Hi folks!
Barry & I are just back from a week of camping in the vicinity of San Simeon (without cell signal or wifi) so this is news you may already have seen on CalBirds or some other channel, but in case you missed it, here’s the exciting news from the California Bird Atlas Big Weekend, (June 4-7):
We will have more info soon on how things stand for us here in San Luis Obispo County. Thanks for everyone’s support in this!
Ginger Langdon-Lassagne
SLO County Regional Coordinator, CBA
<binzer...>
> From: "Van Pierszalowski via groups.io <http://groups.io/>" <van...> <mailto:<van...>> > Date: June 12, 2026 at 1:16:50 PM PDT
> To: <calbirds...> <mailto:<calbirds...> > Subject: [CALBIRDS] California Bird Atlas Big Weekend 2026 Results
> Reply-To: <van...> <mailto:<van...> >
>
> Hi birders,
>
> I’m happy to report that the inaugural California Bird Atlas Big Weekend (June 4-7, 2026) was a tremendous success! Thank you so much to our partners for organizing 54 (!) field trips and events throughout the state in a single weekend. Special thanks as well to our incredible Regional Coordinators <https://ebird.org/atlascalifornia/about/regional-coordinators> and the broader atlasing community.
>
> Amazingly, 47% of the confirmed breeding codes recorded during Big Weekend represented new confirmations (species breeding in atlas blocks where they hadn't yet been confirmed). This highlights the strategic approach atlasers took throughout the weekend, focusing their efforts on expanding coverage and documenting breeding evidence where it mattered most. Many atlasers reported using Blockboard <https://cba-blockboard.share.connect.posit.cloud/> to help identify these opportunities.
>
> See a recap of Big Weekend statistics below. For a deeper dive (plus some of our favorite photos from the weekend), check out the News post <https://ebird.org/atlascalifornia/news/big-weekend-review> on the CBA eBird platform.
>
> BIG WEEKEND BY THE NUMBERS
> 4,180 Atlas checklists were submitted
> 1,211 atlasers submitted checklists, including 181 first-time atlasers
> 1,575 blocks received data, including 194 blocks that had not previously received Atlas coverage (see the News post <https://ebird.org/atlascalifornia/news/big-weekend-review> for a map)
> 26,809 breeding codes were submitted, including 6,121 confirmed-level codes
> 308 species received breeding codes, including 226 species with Confirmed-level breeding codes
> 4,865 confirmed breeding "block ticks" (each species in each block = one block tick), including 2,287 new confirmed block ticks
> DISCOVERIES
> What appears to be the first confirmed breeding record of Canyon Wren in Solano County was reported <https://ebird.org/atlascalifornia/checklist/S354320273> by Eric Pilotte at Stebbins Cold Canyon Reserve on June 7.
> Atlasers added two new species to the Atlas’s list of confirmed breeders: Bufflehead (reported <https://ebird.org/atlascalifornia/checklist/S352892908> by Sam Eberhard in Lassen County) and Green-winged Teal (reported in three different blocks — two in Plumas County, one in El Dorado County).
> We will be organizing CBA Big Weekends every year throughout the Atlas period (2026-2030), and it will be exciting to see how the results evolve from year to year. Thank you again to the incredible birding community, and here's to another great atlasing weekend starting now.
>
> Happy Atlasing,
> Van Pierszalowski
> Director, California Bird Atlas
> CBA website: www.californiabirdatlas.org <http://www.californiabirdatlas.org/> > Join the CBA eBird project: www.ebird.org/atlascalifornia <https://ebird.org/atlascalifornia/home> >
> -Los Angeles,CA
