Date: 4/11/26 9:50 pm From: Lance Benner via groups.io <lbenner...> Subject: [LACoBirds] Bird Atlas Update for Los Angeles County: 2026 April 11
Hi Everyone, Here's another update on progress with the California Bird Atlas in Los Angeles County. These are results as of the morning of 2026 April 11. LA County eBird Atlasers: 526 eBird Checklists: 8027 Atlas effort: 6075 hoursAtlas blocks with data: 328 (76% of the total)Species with a breeding code: 222 Species with breeding confirmed: 110 32 species have been confirmed in at least 10 blocks: 14 Canada Goose 21 Mallard 16 Mourning Dove 28 Anna's Hummingbird 36 Allen's Hummingbird 13 Great Blue Heron 14 Cooper's Hawk 13 Red-shouldered Hawk 37 Red-tailed Hawk 21 Great Horned Owl 35 Black Phoebe 16 Cassin's Kingbird 20 California Scrub-Jay 39 American Crow 89 Common Raven 21 Oak Titmouse 12 Cliff Swallow 65 Bushtit 12 Northern House Wren 23 Bewick's Wren 35 European Starling 16 Northern Mockingbird 19 Western Bluebird 14 Scaly-Breasted Munia 51 House Sparrow 73 House Finch 18 Lesser Goldfinch 20 Dark-eyed Junco 26 Song Sparrow 34 California Towhee 10 Hooded Oriole 10 Orange-crowned Warbler The number on the left gives the number of blocks where each species has been confirmed. The number of blocks with new confirmations of hummingbird and red-shouldered hawks has slowed considerably, which is expected given that these species nest early, but several other species, such as Cooper's hawk, hooded oriole, orange-crowned warbler, and cliff swallow have picked up. Common Ravens, house finches, and bushtits have been confirmed in the most blocks. Los Angeles County blocks where breeding has been confirmed for at least 10 species: 16 Baldwin Park NW 18 Burbank SE 10 El Monte CE 16 El Monte SE 13 Glendora SE 14 Hollywood CE 26 Hollywood NE 13 Hollywood SE 10 Juniper Hills CW 15 Long Beach CE 12 Long Beach CW 10 Long Beach SE 15 Los Alamitos CW 14 Los Alamitos NW 17 Los Angeles CW 10 Los Angeles NE 20 Los Angeles NW 20 Mount Wilson SE 21 Mount Wilson SW 17 Newhall CW 18 Ontario NW 37 Pasadena CE 26 Pasadena CW 18 Pasadena SE 10 Rosamond CW 21 San Dimas CE 32 San Dimas NE 14 San Fernando SE 10 Val Verde SE 13 Valyermo NW 24 Van Nuys CW 19 Venice NE 10 Warm Springs Mountain CW 38 Whittier SE Here the number gives the number of species in that block that have been confirmed. Note that 30+ species have been confirmed breeding in three blocks: Pasadena CE (37), San Dimas NE (32), and Whittier SE (38). Two weeks ago there were 21 blocks on this list. Now there are 34. We are making progress! Blocks with at least 50 species with breeding codes: 54 Baldwin Park NW 77 Burbank SE 59 El Monte SE 58 Hollywood NE 55 Lake Hughes CW 50 Los Alamitos CW 65 Los Angeles NW 64 Mount Wilson CE 53 Mount Wilson CW 53 Mount Wilson SE 62 Mount Wilson SW 53 Ontario NW 75 Pasadena CE 60 Pasadena CW 51 Pasadena NE 64 Pasadena SE 74 San Dimas NE 81 San Fernando SE 56 Valyermo NW 65 Van Nuys CW 58 Venice NE 62 Whittier SEFor comparison, two weeks ago 14 blocks had at least 50 coded species. Now the total is 22. The numbers in some of these blocks are approaching levels from the first Los Angeles County Bird Atlas from 1995-1999. Some are already higher. Given results from the previous Los Angeles County Bird Atlas, we should be able to push the number of coded species above 50 for most of the blocks along the coastal slope, Santa Monica Mountains, valleys, and in the mountains, although perhaps not in the urban core of Los Angeles. With some effort, many blocks in the Antelope Valley might reach ~30 species. Right now is an excellent time to see evidence of breeding. In the past ten days or so, I've seen numerous birds carrying nesting material, carrying food, feeding young, and a few occupied nests. My own neighborhood has been far more productive than I expected. To date, and in no particular order, I've confirmed breeding for the following species:Bewick's Wren, Common Raven, Oak Titmouse, Anna's Hummingbird, Northern Mockingbird, Red-whiskered Bulbul, European Starling, Bushtit, Dark-eyed Junco, House Finch, and Lesser Goldfinch. So please check your neighborhood! To see how much effort has been contributed (number of hours), number of species coded, confirmed, complete checklists, etc. go to: https://ebird.org/atlascalifornia/effortmap Once you bring up the map, you can zoom in to any particular part of the state, and if you click on each rectangle, you can see a summary of effort and species reported there. Although we're making really good progress in Los Angeles County, we still have a long way to go. There are 434 blocks in the county and more than 100 still have zero data. If you're looking for good areas to contribute, check the map discussed above, zoom in on a block where there's little or no effort, and go birding there. We hope you'll join us! Regards, Lance Lance Benner Pasadena, CA One of your friendly neighborhood regional coordinators for LA County. _._,_._,_
