Date: 3/28/26 11:24 am From: Lance Benner via groups.io <lbenner...> Subject: [LACoBirds] Bird Atlas Results for LA County: 2026 March 28
Hi Everyone, We're off to a very strong start with the California Bird Atlas across the state. In this email I want to summarize some results for Los Angeles County. First, a bit of background: Los Angeles County is divided into 434 rectangular blocks based on the US Geological Survey topographic quadrangle maps. Each quadrangle has a name, such as "Waterman Mountain," and each quadrangle is subdivided into six rectangles that are about 3 miles on a side: Northwest, Northeast, Center West, Center East, Southwest, and Southeast. That is:NW NECW CESW SE I poked around in the California Bird Atlas eBird portal (https://ebird.org/atlascalifornia/home) to see how we're doing since January 1. As of 10 am on the morning of March 28, here are some statistics for LA County: Number of Atlasers = 483Hours of Atlas effort = 4975 eBird checklists = 6817Blocks with data = 315 (73% of the county total) Number of species with breeding codes: 203Number of species with breeding confirmed: 90 Here are the species (in taxonomic order) with breeding confirmed in at least 10 blocks: Blocks 13 Mourning Dove 26 Anna's Hummingbird 35 Allen's Hummingbird 10 Great Blue Heron 11 Cooper's Hawk 13 Red-shouldered Hawk 34 Red-tailed Hawk 19 Great Horned Owl 21 Black Phoebe 11 Cassin's Kingbird 18 California Scrub-Jay 37 American Crow 69 Common Raven 12 Oak Titmouse 54 Bushtit 13 Bewick's Wren 26 European Starling 10 Northern Mockingbird 13 Western Bluebird 13 Scaly-breasted Munia 38 House Sparrow 59 House Finch 14 Dark-eyed Junco 14 Song Sparrow 19 California Towhee Common raven has been confirmed the most: in 69 blocks. Here are the blocks where at least 10 species have been confirmed: Blocks with 10+ Species Confirmed: N Location 13 Burbank SE 13 El Monte SE 19 Hollywood NE 12 Hollywood SW 12 Long Beach CE 11 Long Beach CW 15 Los Alamitos CW 12 Los Alamitos NW 11 Los Angeles CW 16 Los Angeles NW 15 Mt. Wilson SE 16 Mt. Wilson SW 16 Newhall CW 14 Ontario NW 22 Pasadena CE 19 Pasadena CW 11 Pasadena SE 18 San Dimas CE 26 San Dimas NE 23 Van Nuys CW 28 Whittier SE The number on the left gives the number of blocks. Here are the blocks with at least 50 species with a breeding code: Blocks with 50+ Species Coded: N Location 51 Baldwin Park NE 71 Burbank SE 54 Hollywood NE 57 Los Angeles NW 50 Mt. Wilson CW 50 Mt. Wilson SE 55 Mt. Wilson SW 61 Pasadena CE 54 Pasadena CW 55 Pasadena SE 67 San Dimas NE 69 San Fernando SE 57 Van Nuys CW 55 Whittier SE Given that there's been effort in 315 blocks, this means that there's no data for 119 blocks, which are concentrated in the San Gabriel Mountains, the Castaic Highlands (i.e., north of Santa Clarita), and in the Antelope Valley. So we're making really good progress but we still have a lot to do! If you haven't contributed to the bird atlas yet, joining is easy. On a computer, go to https://ebird.org/atlascalifornia/home, scroll down a bit, and look for the green button marked "Join Project" on the left. Click on it and then you can contribute!On a phone, start the eBird app, go to the settings, select the "Portal," and then select the California Bird Atlas. We still need a lot of help so we hope you'll join us! Regards, Lance Lance BennerPasadena, CA _._,_._,_
